Bitumen Asphaltive · Middle East Supply Desk

Nepal market · Landlocked, and every tonne transits

Bitumen Supply to Nepal: Transit, Grades and Altitude

Nepal has no coastline. It is bounded by India on the south, east and west and by the Tibet Autonomous Region of China on the north, and there is no third option. Every tonne of imported binder that has ever reached a Nepalese asphalt plant crossed somebody else’s customs territory first, and that single fact reorganises the whole transaction rather than adding a delivery charge to the end of it. A cargo discharged at an Indian east-coast port is not imported there; it is entered for transit, moved under a customs procedure to a nominated land customs station on the Indian side of the frontier, and imported at the Nepalese customs office facing it. The delivery term therefore cannot name a port, because the port is in the wrong country. The importer of record is not the party who receives the goods at the quay. The conformity question has to be asked in the destination and, separately, asked about the territory the goods merely pass through. And the crossings themselves have two names each, one on either side of a line, which is why an enquiry that names Birgunj and an enquiry that names Raxaul are frequently the same shipment described from opposite banks. The second thing that makes this market unlike its neighbours is vertical rather than horizontal. Nepal is commonly cited at around 880 km from east to west and between roughly 145 and 240 km from north to south, and inside that band the land rises from the Terai plains, the belt that the standard physiographic description places below about 300 m and much of which lies under 150 m — hot, humid, and behaving in every pavement respect like the northern Indian plain immediately across the border — through the Middle Hills and the Kathmandu valley at around 1,400 m, to mountain roads that carry genuine winters. One country, and the binder argument inverts along the way, which is why this page declines to name a national grade. Add to that a specification tradition that sits close to Indian practice, so that the IS 73 viscosity grades are what a tender is most likely to name, and a monsoon that concentrates most of the year’s rain into little more than three months and compresses the construction season around it. This page sets out the transit route in full, the crossings and what each one is good for, what a transit regime actually asks of a contract, the altitude and climate argument zone by zone, the viscosity grading system and the one trap that catches every exporter who reads a penetration grade as if it were a viscosity grade, and the conformity and documentary machinery as mechanisms rather than as current positions.

0 kmNepalese coastline, and why this page exists
~1,400 mKathmandu altitude, and why one grade fails
60 °CWhere a viscosity grade is defined, not 25 °C
2713.20HS code

Market summary

Nepal has no coastline, so every tonne of imported binder is a transit movement before it is an import

Most destination pages answer one question: what does this market consume, and how does material reach it. Nepal needs that question answered in two stages, because the place where the cargo arrives by sea and the place where it is imported are in different countries, under different administrations, months of planning apart. Then it needs a second answer that no coastal market requires, because the same country contains a subtropical plain and a mountain winter and the binder decision is not the same at both ends.

Nepal sits on the southern flank of the central Himalaya. India lies to the south, the east and the west; the Tibet Autonomous Region of China lies to the north across the main range. The country is commonly described as around 880 km from east to west and between roughly 145 and 240 km from north to south, and within that band the land rises from the Gangetic plain to the highest ground on earth. Two consequences follow for anyone shipping binder into it, and they are the two spines of this page.

The first is that Nepal is landlocked and there is no marginal case. It has no coastline, no port, no navigable route to the sea and no possibility of one. Every imported tonne of bitumen that has ever been laid on a Nepalese road entered through a foreign customs territory. In practice that territory is India, because the Indian frontier is long, low, road-served, rail-connected at one point and reachable from ports that have handled Nepalese transit cargo for generations, while the Chinese frontier crosses the main Himalayan range at altitude. That is a geographic statement rather than a policy one, and it is the reason a Nepalese enquiry has to be planned backwards from a border crossing rather than forwards from a port.

The second is that Nepal is vertical. The Terai, the plains belt along the Indian frontier, is the low ground of the country: the standard physiographic description places it below about 300 m, and much of the belt, including the towns at the principal crossings, lies well under 150 m. It is hot, humid, subtropical, and in every respect that matters to a pavement it behaves like the northern Indian plain on the other side of the line, because it is the same plain. North of it the Siwalik and Mahabharat ranges rise into the Middle Hills, where the Kathmandu valley floor sits at roughly 1,400 m and winter nights are cool enough to matter. North of that again the high mountain districts carry roads that cross passes well above 3,000 m and endure genuine winters with snow, frost and freeze–thaw cycling. A supplier who answers what grade does Nepal use with a single grade has not asked where the site is, and the answer is wrong for most of the country whichever grade is named.

Why the transit dimension dominates the arithmetic

Bitumen is heavy and low in value density. A tonne of paving binder is worth a small fraction of a tonne of most cargo that occupies the same container and weighs the same. Freight is therefore a large share of landed cost rather than a rounding error — and on this route the freight has three distinct segments rather than one. There is an ocean leg to an Indian east-coast port. There is an overland or rail leg across a foreign country to a land frontier. And there is a Nepalese leg from the frontier to the site, which for a Terai destination may be short and for a hill or mountain destination is slow, steep and constrained by the size of vehicle the road will take.

The commercial consequence is blunt and it is the first thing to settle in writing. A price quoted CIF Kolkata or CIF Haldia is a proper offer and it prices the first segment. For a project in Kathmandu, Pokhara, Butwal or Nepalgunj it leaves the two segments that carry the customs risk, the frontier, the transhipment and the mountain road entirely open. Two offers into Nepal cannot be compared unless they are expressed at the same named inland place, and an offer that names a port is not answering the question a Nepalese buyer asked.

Transit is a different procedure, not a longer delivery

This is the point that most first-time exporters into Nepal get wrong, and it is worth stating in its bare form before the detail arrives further down the page. When a consignment is discharged at an Indian port for a Nepalese buyer, it is not imported into India. It is entered under a customs transit procedure, secured, routed to a nominated land customs station on the Indian side of the frontier, and presented there. The import happens on the Nepalese side, at the Nepalese customs office, against a Nepalese declaration lodged by a Nepalese importer of record. Three things follow immediately:

  • There are two customs files, in two countries, on one consignment. They are opened at different times, by different parties, in different systems, and a document that satisfies one does not automatically satisfy the other.
  • The delivery term must name an inland place. Under Incoterms 2020 the rules built around a vessel and a port — FAS, FOB, CFR and CIF — have coherent meaning at Kolkata or Haldia and no coherent meaning at Birgunj, Bhairahawa or Kathmandu, because there is no vessel and no ship’s rail at a land frontier. The rules that work for any mode are FCA, CPT, CIP, DAP, DPU and DDP, and every one of them names a place.
  • The goods cannot be dealt with along the way. A movement running under a customs transit procedure to a nominated office is not one that can conveniently be split between two receivers, partly discharged, decanted or reblended in the transit country, because the whole mechanism rests on the goods that arrive being demonstrably the goods that entered. That constraint is structural rather than administrative, and it is one of the strongest practical arguments against a bulk tanker on this route.

The crossings, and why an enquiry often names the wrong side of one

Nepalese import traffic concentrates on a small number of land crossings, and each of them is a pair of places facing each other across a line. Birgunj on the Nepalese side faces Raxaul in the Indian state of Bihar and is the principal crossing for Nepalese third-country trade; it is the only one served by rail, through the Sirsiya inland container depot. Bhairahawa faces Sunauli in Uttar Pradesh and serves the western hills, Butwal and the road to Pokhara. Biratnagar faces Jogbani in Bihar and serves the eastern Terai and the eastern hills. Nepalgunj faces Rupaidiha in Uttar Pradesh and is the gateway to the mid-western and far-western hills and the Karnali. Kakarbhitta faces Panitanki in West Bengal at the far eastern end of the country, close to Siliguri.

Because each crossing has two names, enquiries routinely describe the same movement from opposite sides, and a supplier who does not recognise the pairs will treat two quotations as two markets. Worse, a routing decided on the Indian name may be the wrong crossing for the Nepalese destination, because the crossings do not substitute for one another: the roads inland from each of them go to different parts of a country whose internal east–west movement is slow. Fix the Nepalese delivery town first, then choose the crossing, then choose the port. That sequence is the opposite of the one a first-time exporter uses, and it is the correct one.

The specification position, stated once at the top

Nepalese road specification practice sits close to Indian practice, and the practical consequence is that the grade names a Nepalese tender is most likely to use are the IS 73 viscosity grades: VG-10, VG-20, VG-30 and VG-40. This page does not restate those tables, because the viscosity grade bitumen and India pages linked at the foot of this page carry them. What it does do, at length, is explain the one thing that costs exporters money on this market and that a grade table does not show: a viscosity grade and a penetration grade are defined by different properties measured at different temperatures, and one certificate does not evidence the other. A penetration grade is a closed band measured at 25 °C. A viscosity grade is defined by absolute viscosity at 60 °C, close to service temperature, and the penetration line inside it is a minimum with no upper bound at all. An offer that answers a VG-30 clause with a 60/70 certificate has not measured the property the clause is built on. That argument is set out in full further down, with the arithmetic.

The season, which is shorter than the calendar suggests

Nepal is a monsoon country. The south-west monsoon conventionally arrives in the east around the second week of June and withdraws around late September or early October, and the great majority of the year’s precipitation falls inside that window — commonly cited at around eighty per cent nationally. Roadworks and asphalt laying are effectively suspended for the duration in most of the country, which compresses the construction season into the months either side of it. At altitude winter takes a further bite out of the other end. The practical result is a market where material has to be pre-positioned rather than called off, where demand concentrates into predictable weeks, and where a consignment that misses a window waits for the next one rather than arriving late. The climate section sets this out zone by zone, together with the landslide season that follows the monsoon in the hills, described as a climatic risk to routing rather than as a claim about the state of any road on any date.

The five things that decide a Nepalese order

  • The delivery town, not the country, and roughly how high it is. Terai, Middle Hills or high mountain are three different binder conversations and three different transport propositions.
  • Which crossing, and therefore which Indian port. The crossing is chosen by the Nepalese destination; the port is chosen by the crossing. Doing it the other way round produces an unnecessary inland leg in the wrong country.
  • Which grade system the clause is written in, and which grade. A viscosity grade and a penetration grade are not translations, and the ageing evidence differs as well as the grade name.
  • Packing, decided by the inland leg rather than by the packaging cost. The combination of a foreign transit leg, a transhipment at the frontier and a mountain road is why drums dominate this market.
  • Which conformity and customs requirements apply, and in which of the two territories. The destination is Nepal; the transit country is India; the questions are different and both have to be put to a licensed customs broker.

What this page does not tell you

It does not state that any port, berth, terminal, road, railway, inland container depot, border post or transit service is open today, running to a schedule, equipped for this commodity or available for your cargo. Geography is described because geography is stable and publicly checkable; operating status is not, it changes, and it belongs to the freight forwarder who is accountable for it. Road distances, where given at all, are commonly cited approximations for orientation and are not a basis for a freight calculation. No transit times, freight rates, vehicle payloads, vessel or tanker capacities, port throughput or draught figures, container free time periods, detention charges, duty rates, taxes, levies, exchange rates or currency parities appear anywhere. No haulier, forwarder, terminal operator, clearing agent, inspection body, railway operator, refinery, product brand or client is named as a counterparty, and no presence, office, agency or shipping history in Nepal, India, Bangladesh or China is claimed. It states no position on whether bitumen is currently within the scope of any conformity, certification or import-control scheme in any country on the route, and it names no currently appointed inspection agent, for the reason set out at length in the conformity section. It quotes no Nepalese national standard designation for paving bitumen. And it is not legal, customs, regulatory, insurance or compliance advice; a buyer moving goods across these frontiers must take independent advice covering the goods, the parties, every customs territory on the route and the payment mechanism.

Sea gateways

Where a Nepal-bound cargo actually lands, and why it is an Indian east-coast port

Nepal has no port, so the sea leg ends in another country and the choice of that country’s port is made by reference to a Nepalese border crossing hundreds of kilometres inland. Kolkata and Haldia are the historic gateways for Nepalese third-country trade, sitting on the Hooghly at the head of the Bay of Bengal and closest by land to the eastern and central crossings. Visakhapatnam, further south on the Andhra coast, is an alternative that appears in Nepalese transit planning as a deep-water option. This table is a map, not a timetable: it states nothing about whether any facility is open, what it handles, whether it can receive this commodity in your packing, or whether any transit arrangement is currently available through it.

Sea gateways used or discussed for Nepalese transit cargo, the Nepalese crossings each naturally feeds, and the planning point each raises.
Gateway Position and character Nepalese crossings it naturally feeds What distinguishes it What a bitumen planner should note
Kolkata, on the Hooghly A riverine port well upstream from the open sea on the Hooghly distributary of the Ganges, in West Bengal. The approach is a long river passage rather than a coastal one Historically all of them, and by land most naturally Kakarbhitta and the eastern and central crossings; Birgunj by road and by the rail route The classical gateway for Nepalese third-country trade and the port around which the transit machinery was originally built. It is a river port, which is the single most important thing to know about it The default assumption on many Nepalese enquiries, and the one most worth testing rather than accepting. A river port is a different kind of proposition from an open-coast one, and questions about its approach, its handling and its suitability for a particular parcel belong to a freight forwarder rather than to a supplier page. No draught, channel, throughput or berth figure is stated here and none should be inferred. What matters commercially is that whatever lands here is entering a transit procedure rather than an import, so the party who can act at the quay is not the Nepalese buyer.
Haldia, downstream on the Hooghly A dock complex on the western bank of the Hooghly, downstream of Kolkata and nearer the sea, developed to handle vessels and cargoes that the upstream docks are less suited to The same set as Kolkata, with the same land routings onward The bulk and liquid-oriented complement to the upstream docks, and the second of the two historic Nepalese gateways. It sits under the same port administration as Kolkata Named in Nepalese transit practice alongside Kolkata often enough that the pair should be treated as one gateway with two discharge points rather than as two competing ports. For a bitumen planner the distinction that matters is not which of the two is nominally larger but which one can receive the packing you are shipping and release it into the transit procedure your broker has arranged. That is a forwarder and clearing agent question, in writing, before the parcel is fixed. Heated tankage, drum handling, covered storage and the ability to hold a parcel are contracted commercial arrangements with individual operators and can never be inferred from a port’s name or reputation.
Visakhapatnam, on the Andhra coast A natural harbour on the east coast of India, a long way south of the Hooghly ports and with a direct sea approach rather than a river one Reached overland to the same crossings, but the land distance from it to the Nepalese frontier is materially greater than from the Hooghly ports A deep-water east-coast alternative that appears in Nepalese transit discussion as an additional gateway. Its advantage is maritime; its disadvantage is the length of the Indian land leg Worth putting to the forwarder rather than assuming. The trade-off is explicit: a direct coastal approach against a longer overland movement inside the transit country, which on a low value density cargo is exactly the segment where the money goes. The number of frontier events does not change — it is still one transit country and one crossing — but the exposure to the Indian leg lengthens, and so does the time under a transit procedure and under inland transit insurance. This page states nothing about which arrangements are currently available through which port.
Other Indian east-coast ports The eastern Indian seaboard carries several further ports between the Hooghly and the Andhra coast In principle the same crossings, by longer or shorter land legs The list of ports available for Nepalese transit has been extended over time as arrangements have been revised Named here only to make the map honest, and deliberately not enumerated as available options. Whether a given port may currently be used for Nepal transit traffic, for this commodity, in this packing, is a matter of current arrangements between two governments and of the operational reality at the facility. It is a question for a licensed customs broker in Nepal and a freight forwarder, answered in writing and dated, and re-asked if the shipment slips. Nothing here asserts that any port beyond the three named above is or is not available.
Indian west-coast ports The Arabian Sea coast, a very long way west of the Nepalese frontier by land None naturally Geographically the wrong side of the subcontinent for a Nepalese destination Listed so that the comparison is closed rather than left open. For a cargo originating in the Middle East the west-coast approach can look attractive on the sea leg alone, and that is precisely the trap this page warns about throughout: the sea leg is the segment that prices easily and the land leg is the segment that costs. A west-coast landing puts the whole width of northern India between the discharge point and the Nepalese frontier. If a forwarder proposes it, ask for the comparison at the same named inland place in Nepal, not at the port.
Bangladeshi ports, by way of the Siliguri corridor Mongla and Chittagong lie on the Bay of Bengal in Bangladesh. The land route from either to Nepal runs north through Bangladesh to the Banglabandha crossing, faces Phulbari on the Indian side, and then runs west through the narrow Indian corridor at Siliguri to Panitanki and Kakarbhitta Kakarbhitta in the far east, and only Kakarbhitta A genuinely different gateway country, and the one alternative to Indian ports that involves a short rather than a heroic land leg. It still crosses Indian territory, because the Indian corridor at Siliguri separates Bangladesh from Nepal Worth understanding as a mechanism because Nepalese trade policy has long treated Bangladeshi ports as a diversification option and buyers in the eastern Terai raise it. Two structural points. First, this routing does not remove India from the transaction: the Phulbari to Panitanki leg is Indian territory, so there are two frontiers on the land side rather than one plus an Indian transit. Second, it is a far-eastern routing and it serves the far east of Nepal; it is not an alternative for Nepalgunj or the far west. Whether it is currently available for this commodity is entirely a question for a clearing agent in the destination, and nothing here asserts it.
Chinese ports, by way of the northern crossings The Chinese sea ports are on the Pacific coast, thousands of kilometres from Nepal, and the land route reaches Nepal across the main Himalayan range through crossings such as Rasuwagadhi facing Kerung and Tatopani facing Zhangmu The northern crossings only, into the central hills The only routing that does not touch India at all, and the only one that has to cross the highest mountain range on earth to get here Included because a complete map of a landlocked country’s options has to include it, and because transit arrangements with the northern neighbour have been the subject of agreement between the two governments; this page states nothing about their current terms, scope or operability. For a heavy, low value density commodity the arithmetic is unkind: the sea leg is far longer, the land leg crosses high passes on mountain roads, and the altitude and winter closure characteristics of a high Himalayan crossing are not those of a Terai land customs station. This page states nothing about the current status, capacity or availability of any northern crossing, and a buyer considering one should treat every operational question about it as a forwarder question answered in writing and dated.
Four cautions belong with this table. First, it describes geography and mechanism, not availability. Whether any gateway above is open, whether it handles this commodity, whether covered storage or heated tankage exists for your parcel, and whether a transit arrangement currently runs through it are operating questions that change and must be confirmed in writing with a freight forwarder and a licensed customs broker before a contract is signed. Second, no draught, throughput, capacity, berth or channel figure is stated anywhere on this page, and none should be inferred from the descriptions above. Third, the port is chosen by the crossing and the crossing is chosen by the Nepalese town. Reversing that order is the commonest planning error on this route and it is expensive, because it buys an unnecessary land leg inside the transit country. Fourth, whatever the gateway, the cargo lands in a country that is not the destination: the party who can act at the quay, the declaration that is lodged there and the guarantee that secures the movement all belong to the transit leg, not to the Nepalese import. Petroleum bitumen falls under HS heading 2713.20; the full national subheading and any duty, levy or tax treatment must be confirmed with a licensed customs broker in Nepal, and no rates of any kind are stated here.

Border crossings

The crossings, both names, and what lies inland from each

This is the table that decides a Nepalese shipment, and it is the one no generic supplier page carries. Each crossing is a pair: a Nepalese place and an Indian place facing each other, with a Nepalese customs office on one side and an Indian land customs station on the other. They are not interchangeable, because the roads inland from each go to different parts of a country in which east to west movement is slow and north to south movement climbs. Read the Nepalese destination column first and work outward. Nothing here states that any crossing is open, staffed for commercial freight of this description, or usable on your date.

Principal Nepalese border crossings with their Indian counterparts, the inland clearance arrangements at each, and the Nepalese hinterland each serves.
Nepalese side Indian side Where it is, and what it serves inland Inland clearance and rail What it means for a bitumen consignment
Birgunj, in Parsa district in the central Terai Raxaul, in Bihar The central Terai directly north of the Bihar plain, and the shortest and most direct approach to the Kathmandu valley by way of Hetauda. The Tribhuvan Highway climbs from Hetauda over the Mahabharat range through the pass at Daman, commonly cited at around 2,300 m, before descending into the valley; a lower and longer alternative runs east to Narayangadh and then up the Trishuli valley on the Mugling road The principal inland clearance point for Nepalese third-country trade. The Sirsiya inland container depot at Birgunj was built with a broad-gauge rail link across the frontier to Raxaul, physically connecting Nepalese inland clearance to the Indian railway network, and it is the only Nepalese inland clearance point to have been connected to a railway. Whether any service runs on it for this commodity on your date is a forwarder question and is not stated here The default crossing for a central or Kathmandu-bound consignment, and the one where a container can plausibly arrive by rail rather than by road. Three planning consequences. First, rail arrival changes the handling profile: the box is discharged and stripped at an inland depot rather than trucked the whole way, which reduces road handling events but concentrates them at one place. Second, the climb to Kathmandu is the real constraint, not the frontier: whatever the vehicle carrying a consignment from Birgunj, it has to get up and over the Mahabharat, and the practical vehicle size is set by that road rather than by the highway in the Terai. Third, whether any rail service is running for this commodity in this packing on your date is a forwarder question in writing, and nothing here asserts it.
Bhairahawa, in Rupandehi district, with the frontier point at Belahiya Sunauli, in Uttar Pradesh The western Terai, and the natural gateway to Butwal, the Siddhartha Highway north through Palpa and Tansen to Pokhara, and the western hills generally. Lumbini lies close by An inland clearance depot has been established at Bhairahawa for road-borne cargo; whether it is operating and accepting this commodity on your date is a forwarder and broker question. There is no rail connection across this frontier The right crossing for a Pokhara, Butwal, Palpa or western-hills project and the wrong one for Kathmandu. The Siddhartha Highway is the classic Nepalese hill road: it climbs steeply out of the Terai, follows ridges and river gorges, and the maximum practical vehicle is set by radius and gradient rather than by weight limit alone. That makes the packing decision here more binding than at Birgunj — a drum can be transferred to a smaller vehicle for the final climb, and a bulk tanker cannot be made smaller. Confirm the vehicle the receiving site can actually accept before agreeing the packing, not after.
Biratnagar, in Morang district, with the frontier point at Rani Jogbani, in Bihar The eastern Terai, Nepal’s eastern industrial belt, and the roads north into the eastern hills toward Dhankuta and beyond An inland clearance depot has been established at Biratnagar for road-borne cargo; its operating status on your date is a forwarder and broker question. A rail alignment on this frontier has been the subject of development work over a long period; this page states nothing about what is built, commissioned or in service The natural crossing for an eastern Terai or eastern hills project, and the one at which a buyer in Dharan, Itahari or Damak is likely to be clearing. The Terai leg from here is flat and fast by Nepalese standards; the hill leg north of Dharan is not, and the same vehicle-size argument as at Bhairahawa applies from the moment the road leaves the plain. Do not assume that because Biratnagar is a substantial commercial centre the receiving site further north can take the same vehicle.
Nepalgunj, in Banke district, with the frontier point at Jamunaha Rupaidiha, in Uttar Pradesh The mid-western and far-western Terai, and the gateway to the Karnali: the road north through Surkhet toward Jumla and the mid-western hills, and the approaches to the far-western districts An inland clearance depot has been established at Nepalgunj for road-borne cargo; its operating status on your date is a forwarder and broker question. No rail connection The crossing that matters most for the least-served part of the country, and the one where pre-positioning is not a precaution but the plan. Everything north of Surkhet is high, remote and slow, with roads that are seasonal in character and a construction window narrowed at both ends by the monsoon and by winter. A consignment for Jumla or the Karnali districts is a consignment that has to be delivered in quantity when the road allows and stored, which makes drum condition, covered storage and staged call-off the governing considerations rather than the packaging cost per tonne.
Kakarbhitta, in Jhapa district at Mechinagar Panitanki, in West Bengal The far eastern corner of the country, at the head of the East–West Highway, close to Siliguri on the Indian side. It serves the far-eastern Terai and the roads north toward Ilam and the eastern hills An inland clearance depot has been established at Kakarbhitta for road-borne cargo; its operating status on your date is a forwarder and broker question. No rail connection across this frontier One of the shorter land legs from the Hooghly ports, which is why it recurs in eastern Terai planning — though no distance is stated here and the comparison with Birgunj is closer than most buyers assume, and the only crossing that connects usefully to a Bangladeshi routing by way of Phulbari and Banglabandha. Two cautions. It is the far eastern end of a country whose internal east to west movement runs the length of the Terai on a single highway, so it is a poor gateway for anything west of the centre. And a short land leg on the Indian side does not shorten the Nepalese leg: for an Ilam or eastern-hills site the climb still has to be made.
Krishnanagar, in Kapilvastu district Barhni, in Uttar Pradesh The western Terai west of Bhairahawa, serving Kapilvastu and the roads north A smaller road crossing without a major inland clearance facility of the kind found at the five principal points Named for completeness of the map because a buyer in the western Terai will encounter it. Smaller crossings can be entirely appropriate for domestic bilateral trade and are a different proposition for third-country transit cargo moving under a customs procedure to a nominated station. Which crossings are nominated for transit traffic, and whether this one is among them for your commodity, is a question for a licensed customs broker in Nepal, in writing and dated. Nothing here asserts it.
Gaddachauki, in Kanchanpur district near Bhimdatta Banbasa, in Uttarakhand The far western end of the country, at the western terminus of the East–West Highway, serving the far-western Terai and the approaches to the far-western hills A road crossing serving the far west, without the inland clearance scale of the principal points The far-western equivalent of Kakarbhitta and subject to the same logic in reverse: it is the right end of the country for a far-western Terai project and the wrong end for anything else. As with Krishnanagar, whether it is a nominated point for third-country transit cargo is a broker question and is not stated here. For a far-western hill project the practical comparison is between this crossing and Nepalgunj, and it is made on the Nepalese road rather than on the Indian one.
Rasuwagadhi, in Rasuwa district Kerung, in the Tibet Autonomous Region of China The central northern frontier, reached from Kathmandu by the road north through Trishuli and Dhunche. A high Himalayan crossing rather than a plains one A land crossing on the northern frontier; not part of the Indian transit system and not served by any inland container depot of the Terai type Included so that the map is complete and because Nepal’s transit options are not limited to one neighbour as a matter of geography. Whether they are open to this commodity as a matter of arrangement is a separate question, and this page answers neither half of it. For binder the arithmetic is unfavourable and should be stated plainly: the sea leg to a Chinese port is far longer, the land leg crosses the main range, and the road from the frontier to Kathmandu is a mountain road with the seasonal characteristics of one. This page states nothing about the current status, capacity, opening or usability of this or any northern crossing on any date.
Tatopani, in Sindhupalchok district Zhangmu, in the Tibet Autonomous Region of China The historic northern crossing on the Araniko Highway north-east of Kathmandu, following the Bhote Koshi gorge As above; a northern land crossing outside the Indian transit system The other northern point, and the same caution applies with the same force. The Araniko Highway is a gorge road in young, steep, tectonically active terrain, which is a description of its geology and not a statement about its condition on any date. Any plan that depends on a northern routing has to be confirmed with a forwarder and a clearing agent before a contract is signed, and this page takes no position on it.
Four things to take from this table. First, every crossing has two names and they are not two crossings. Birgunj and Raxaul, Bhairahawa and Sunauli, Biratnagar and Jogbani, Nepalgunj and Rupaidiha, Kakarbhitta and Panitanki are five frontier points described from either side, and an enquiry that names only the Indian side is describing a Nepalese destination it has not yet stated. Second, the crossing is chosen by the Nepalese town, and the port is chosen by the crossing. Nepal’s internal geography makes east to west movement slow and north to south movement steep, so landing a far-western cargo at the eastern end of the country is a mistake that no freight rate recovers. Third, Birgunj is the only rail-served point, through the Sirsiya inland container depot, and that is a structural fact about the corridor rather than a claim that any service is running. Fourth, the frontier is not the constraint; the Nepalese road beyond it is. At Birgunj the climb to Kathmandu, at Bhairahawa the Siddhartha Highway, at Nepalgunj the road to Surkhet and the Karnali, and at Biratnagar the eastern hill roads all set the practical vehicle size and therefore the packing. Fix the receiving vehicle before fixing the packing, and fix both before agreeing a delivery term.

Transit, delivery terms and routing economics

What transit through a third country actually asks of the contract

Everything a buyer plans at an Indian port is provisional until the crossing and the Nepalese destination are settled, and everything a seller writes into a contract is wrong until it acknowledges that the goods will be imported in a country the vessel never reaches. This section describes the transit machinery as a mechanism. It states no current terms, no current arrangements and no current status, because those are matters for two governments and for the licensed customs brokers who work under them.

The legal frame, described as a frame

The right of a landlocked state to move goods across a neighbour’s territory is not an informal courtesy; it rests on a stack of instruments, and understanding the stack explains why the paperwork looks the way it does. At the multilateral level, freedom of transit is addressed in Article V of the General Agreement on Tariffs and Trade, and there is a dedicated United Nations Convention on Transit Trade of Land-locked States concluded in 1965. At the bilateral level, Nepal’s third-country trade across India has long been governed by a treaty of transit between Nepal and India, periodically renewed and revised, with subordinate protocols and memoranda setting out routes, nominated customs points, procedures and the treatment of particular categories of goods.

This page describes that arrangement as a mechanism and states nothing about its current terms, its current renewal position, the routes currently nominated under it or the treatment of any particular commodity within it. Those change, they are settled between two governments, and an undated supplier page asserting them is precise enough for a buyer to plan a shipment on and wrong often enough to ruin one. Get the current position in writing and dated from a licensed customs broker in Nepal, and get it again if the shipment slips.

Transit is a procedure, not a longer delivery

The structural features of a transit regime are stable even when the detail is not, and they are worth stating because they are what makes a Nepalese shipment different from a coastal one.

  • The goods do not enter the transit country’s economy. They are landed and moved under a customs procedure that suspends the duties and taxes that would otherwise fall due, on the basis that they will leave again at a nominated point. Nothing about that movement is an import into the transit country, and nobody in the transit country is the importer of record.
  • A declaration specific to transit is used. For Nepal-bound traffic across India the instrument is conventionally a customs transit declaration, commonly referred to by the initials CTD, lodged for the movement from the port of landing to the nominated Indian land customs station. Its current form, content, lodgement route and supporting requirements are matters for a licensed broker and are not described here.
  • The movement is secured. Because duties are suspended rather than paid, the transit country requires security — conventionally a bond, a bank guarantee or an equivalent instrument — standing in for the charges that would fall due if the goods failed to leave. Somebody has to provide it, it has a value, and it has a cost. Ask at the enquiry stage who provides it and how it is priced, because it is a real line and it is frequently invisible in a first quotation.
  • The route and the exit point are nominated, not chosen en route. A transit movement runs from a stated port to a stated land customs station. It is not an opportunistic routing that can be redirected because a road is busy, and it cannot be split between two crossings because a buyer has two sites.
  • The goods cannot be dealt with along the way. No partial discharge, no decanting, no reblending, no sale in the transit country. This is the structural reason a bulk tanker is a poor fit for this route, and it is also why a single order destined for two Nepalese regions is best planned as two consignments from the enquiry rather than discovered as such at the frontier.
  • Discharge of the procedure happens at the exit. The security is released when the goods are accounted for at the nominated station. Until then the movement is live and somebody carries the exposure.

The two customs files, and the order they are opened in

A Nepalese consignment generates two entirely separate customs events. On the Indian side there is the port entry and the transit declaration, handled by an Indian clearing agent acting for whoever is the party of record for the transit movement. On the Nepalese side there is the import declaration — known locally as the pragyapan patra — lodged at the Nepalese customs office facing the crossing, by a Nepalese importer with the registrations that Nepalese law requires. Nepal’s customs administration sits under the ministry responsible for finance and operates an electronic declaration system of the UNCTAD ASYCUDA family; importers are ordinarily required to hold the registrations and identifiers that the customs and central bank framework specifies, including an export–import code and tax registration. Which registrations apply to a particular buyer, and what evidence they need from the seller, is a broker question.

The practical consequence for a seller is one that first-time exporters miss. The commercial documents are needed earlier than on a coastal shipment, and they are needed by two different parties. The transit declaration on the Indian side and the import declaration on the Nepalese side both draw on the invoice, the packing list, the transport document and the certificate of origin, and a discrepancy between the copies used on either side of the frontier is a hold in a country where neither the seller nor the buyer is standing. Fix the goods description word for word at contract stage and never let it drift across the invoice, the packing list, the bill of lading, the transit declaration, the certificate of analysis and the credit.

Rail, the Sirsiya depot, and what a rail arrival changes

Nepal has no extensive national railway network of the kind that carries freight inland from a frontier. What it has, and what makes Birgunj the principal crossing, is a broad-gauge rail link across the frontier from Raxaul to the Sirsiya inland container depot at Birgunj, which physically connects Nepalese inland clearance to the Indian railway network. The gauge is the Indian broad gauge, so there is no break of gauge on the Indian side of the movement — a genuine structural advantage that several other landlocked corridors described elsewhere on this site do not have.

What a rail arrival changes, if one is available, is the handling profile rather than the customs position. The container moves inland as a unit and is stripped at an inland depot rather than at the port, which reduces the number of road handling events but concentrates them at a single place with a single set of records. What it does not change is the transit procedure, the security, the nominated exit or the fact that the goods are imported in Nepal rather than in India. And whether any rail service is running, whether it accepts this commodity, whether it accepts your packing and what the wagon and container arrangements are, are operating matters that change and belong to a freight forwarder in writing. Nothing on this page asserts that a rail movement is available.

The road legs, and the three of them there are

A Nepal-bound consignment has, at most, three road segments and each has a different character.

  • The Indian leg, from the port to the frontier. Long, on a foreign network, under a transit procedure, with the vehicle and the goods secured. This is the segment where the transit security is live and where a discrepancy between documents and load has the most expensive consequences.
  • The Terai leg, from the crossing along the plain. Nepal’s East–West Highway, the Mahendra Highway, runs the length of the Terai from Mechinagar in the east to Bhimdatta in the far west and is commonly cited at around a thousand kilometres. It is flat, and by Nepalese standards it is fast. It is also, for most of that distance, the only through east–west route in the country, which is why a cargo landed at the wrong end of the Terai stays wrong.
  • The hill leg, from the plain to the site. This is the segment that decides the packing. Roads such as the Tribhuvan Highway from Hetauda over the pass at Daman, the Narayangadh to Mugling road up the Trishuli, the Prithvi Highway to Pokhara and the Siddhartha Highway from Butwal through Palpa are mountain roads with gradients, tight radii and river gorges. The practical maximum vehicle is set by the road rather than by a weight table, and a consignment that arrives at the Terai in one vehicle may need to leave it in several.

Container detention, and the cost line that catches Nepal buyers

On a coastal delivery a container is emptied near the port and returned to the line without leaving the customs territory it landed in. On a Nepalese delivery the box crosses an international frontier with the cargo and has to come back across it, and the round trip is measured accordingly. Shipping lines allow a contractually agreed period of free time and charge detention thereafter; the free period and the charge are commercial terms between the buyer and the line, and no figures are stated here. The exposure is real enough that stripping at an inland depot at or near the crossing and moving drums onward on Nepalese vehicles is a routine plan rather than an exception. That decision has to be made before the cargo is booked, because it changes the packing plan, the handling count, the insurance arrangement and the number of places a drum count can be disputed. Ask the question at the enquiry stage rather than discovering it on an invoice.

The delivery term has to name an inland place, and here it has to name the right one

Under Incoterms 2020, FAS, FOB, CFR and CIF are rules for sea and inland waterway transport. They are built around a vessel and a port, they have coherent meaning for a parcel discharging at Kolkata, Haldia or Visakhapatnam, and they have no coherent meaning for a truck arriving at Birgunj or a container stripped at Bhairahawa, because there is no vessel and no ship’s rail at a land frontier. The rules that work for any mode are FCA, CPT, CIP, DAP, DPU and DDP, and every one of them requires a named place.

Four errors recur on Nepalese business, and three of them are specific to a landlocked destination:

  • Quoting CIF Kolkata against a Kathmandu project and calling it a delivered price. It is not. It prices the sea leg and leaves the transit leg, the frontier, the transhipment and the climb to the valley open. If a CIF port price is quoted, label it as what it is on the face of the offer so the buyer compares like with like.
  • Naming a country rather than a place. DAP Nepal is not a delivery term. DAP followed by a named town, depot, plant or project site is. On this route the named place must also settle who arranges the formalities at the frontier and who bears the cost of a vehicle standing and waiting, because on a land movement the truck and the driver are idle at somebody’s expense while a declaration is processed.
  • Naming an inland place in the wrong country and calling it delivered. A term naming Raxaul is a term ending on the Indian side of the line. A term naming Birgunj is a term ending on the Nepalese side. Those are different obligations with a customs frontier between them, and the difference is precisely the part of the journey a Nepalese buyer most wants priced. Say which side of the line the named place is on, in words.
  • Agreeing DDP into Nepal casually. DDP puts import clearance and charges on the seller. In a country where the seller has no presence, cannot hold the local registrations and cannot be the importer of record, that is a far heavier undertaking than it looks on a term sheet, and on this route it also drags the seller into a transit procedure in a third country. Treat DDP as an exception requiring deliberate structuring, not as a convenience.

Insurance, and the gap after the port

Two points are specific enough to be worth stating carefully. First, a marine cargo policy that ends at the Indian port does not cover a movement across India and into Nepal. Inland transit cover has to be arranged deliberately and it has to run across the frontier rather than stopping at it; a policy that lapses at the line leaves the most handling-intensive part of the journey uncovered. Carrier liability under a road carriage arrangement is limited and is not cargo insurance, and it will not make a buyer whole on a full load lost on a hill road. This is the most commonly missed line on a first Nepalese shipment. Second, the delivery term and the insurance arrangement have to be chosen together rather than in sequence: CIF and CIP are the rules under which the seller procures cover, and a buyer intending to place cover locally should be contracting on CFR, CPT or FOB instead. Confirm the position, including any local placement requirement in the destination, with an insurance broker before the delivery term is agreed rather than afterwards.

Payment, the currency relationship, and the credit

One currency point is worth knowing before a Nepalese negotiation starts, because it is specific to this pair of countries and it shapes how a buyer reads a price. The Nepalese rupee has long been maintained at a fixed relationship to the Indian rupee rather than floating independently against it, so a Nepalese buyer’s exposure on a dollar-denominated contract moves with the Indian rupee in a way it would not in any other market on this site, and a comparison against an Indian landed price is not distorted by a cross rate between the two currencies. That is a structural description rather than a quotation of any rate: no rate, parity figure or forecast is stated on this page, and the current position and any hedging arrangement belong to the buyer’s bank. Import payment itself is regulated through the framework administered by the central bank, and letters of credit are the ordinary instrument for a cargo of this size and character. A documentary credit is a mechanism for paying against documents, and on this route the documents are the whole exposure, so the credit has to be drafted against the documents that will actually exist. Two Nepal-specific cautions. Do not draft a credit calling for a document that a transit movement does not generate, and do not call for a document only obtainable in the destination as a condition of a payment that has to be made before the goods get there. And settle at drafting stage which transport document the credit will accept, because a movement that arrives by rail and road inland does not produce the same document as one that ends at a quay. A credit that calls for a marine bill of lading covering a delivery to an inland Nepalese place has an internal contradiction in it, and it will be discovered by a bank rather than by a forwarder.

The order to take the decisions in

Because a transit consignment has more moving parts than a coastal import, the sequence matters, and taken in this order no decision invalidates the one before it.

  • First, establish the Nepalese delivery town and roughly how high it sits. Everything else follows and nothing can be settled before it.
  • Second, choose the crossing that serves that town — Birgunj for the centre and the Kathmandu valley, Bhairahawa for Butwal, Pokhara and the western hills, Biratnagar for the east, Nepalgunj for the mid-west and the Karnali, Kakarbhitta for the far east.
  • Third, choose the port from the crossing, not the crossing from the port, and say on the offer which gateway the price is built on.
  • Fourth, put the transit questions to a licensed customs broker in Nepal in writing: which routes and stations are nominated, what security the movement requires and who provides it, and what the Nepalese import needs from the seller.
  • Fifth, settle the routing, the mode and the operating status with a freight forwarder in writing, including whether the box goes inland or is stripped at the crossing, and what the detention exposure is.
  • Sixth, read the tender’s binder clause and establish whether it is written in the viscosity grade system or the penetration system, then settle the ageing evidence before the batch is certified.
  • Seventh, choose the packing from the hill leg and the receiving vehicle, then convert tonnage into containers with the arithmetic further down this page and into vehicles with the forwarder.
  • Eighth, choose the Incoterms 2020 rule from the mode and name the place precisely, stating which side of the frontier it is on, and settle who bears standing time at the crossing.
  • Ninth, write the test schedule into the contract and inspect at loading, with sampling to IS 1201 or ASTM D140, sealed retained samples held by both parties, and a recorded drum count, drum condition and seal number at every handover — of which this route has more than most.

Altitude, climate and season

One small country, three climates, and why this page names no national grade

Nepal spans a vertical range that no other market on this site approaches, and it does so over a horizontal distance short enough that a single road can cross two of the zones in a morning. The Terai below about 100 m is subtropical and behaves like the northern Indian plain because it is the northern Indian plain. The Middle Hills, with the Kathmandu valley floor at roughly 1,400 m, are temperate with cool winter nights. The high mountain districts carry roads with real winters, frost and snow. The rutting argument, the thermal cracking argument and the moisture argument each govern in a different zone, and no single binder answers all three. Read this table before agreeing a grade for a site you have not located and whose altitude you have not asked for.

Nepalese climate and altitude zones, their season character, and the binder, packing and scheduling consequence of each.
Zone Where it is, and roughly how high Season and rainfall character Temperature character What it means for binder, packing and season
The Terai, the plains belt The southern strip along the Indian frontier, from Jhapa in the east through Birgunj, Bhairahawa and Nepalgunj to Kanchanpur in the far west. Placed below about 300 m in the standard physiographic description, with much of the belt and the towns at the principal crossings well under 150 m, rising gently northward to the foot of the Siwaliks Subtropical monsoon. The great majority of the year’s rain falls in the south-west monsoon, conventionally from around the second week of June to late September or early October. The pre-monsoon months are hot and increasingly humid; the post-monsoon and winter months are dry Hot. Pre-monsoon maxima commonly reach around 40 °C in April, May and early June before the rains break, with high humidity through the monsoon itself. Winter is mild by any Himalayan standard, with cool nights and persistent fog in December and January Pavement temperature is the governing case and rutting is the governing failure mode, which points to the harder end of the viscosity grade range. This is where Indian plains practice applies almost without adjustment, because it is the same plain and the same climate. Two packing points. The monsoon makes covered storage a requirement rather than a preference, and a drum head that collects standing water is a safety problem rather than a housekeeping one. And the winter fog affects road movement on both sides of the frontier in a way that is climatic and predictable rather than exceptional.
The Inner Terai and the Dun valleys Chitwan, Dang, Deukhuri, Surkhet and the other broad valleys enclosed between the Siwalik and Mahabharat ranges. Typically a few hundred metres above the outer Terai Monsoon, with rainfall generally heavier than the outer plain because the first ranges force the moist air upward. The monsoon window is broadly the same Warm to hot, with maxima a little below the outer Terai and a somewhat wider day to night range as the enclosing ranges reduce the maritime influence of the open plain Effectively a warm-climate case that is nearly the Terai case, and in binder terms it is treated as such. What changes is the water: the enclosed valleys are wetter, drainage is a live design question, and moisture damage in the mix becomes a real durability risk rather than a theoretical one. That is answered in the mix design and the aggregate affinity rather than in the binder grade, which is a point worth making explicitly to a buyer who expects a grade change to solve it.
The Siwalik and Mahabharat crossings The ranges that every road from the Terai to the hills has to cross: the Tribhuvan Highway over the pass at Daman, commonly cited at around 2,300 m; the Narayangadh to Mugling road up the Trishuli gorge; the Siddhartha Highway through Palpa Heavy monsoon rainfall on the southern faces, which are the first ground the monsoon meets after the plain. The post-monsoon months are the clearest and the driest working period Cooler with height and with a widening day to night range. Frost is possible at the higher passes in winter Not really a construction zone in its own right so much as the segment every hill consignment crosses, and that is exactly why it belongs in a binder planning table. The vehicle that can make these climbs sets the packing for everything beyond them. The rainfall and the young, steep, tectonically active geology make these alignments the classic landslide-exposed sections of the Nepalese network during and after the monsoon, which is a climatic and geological description and not a statement about the condition of any road on any date.
The Middle Hills and the Kathmandu valley The broad belt of hills between the Mahabharat and the high mountains, containing most of the population outside the Terai. The Kathmandu valley floor sits at roughly 1,400 m; Pokhara is lower, commonly cited at around 800 m; hill towns range from a few hundred metres in the valleys to well over 2,000 m on the ridges Monsoon-dominated, with the same June to September window and considerable local variation with aspect and altitude. Winter is dry and clear Warm temperate. Kathmandu summer maxima commonly sit around the high twenties to around 30 °C, and winter minima commonly fall to around 2 to 5 °C with ground frost in the valley on the coldest nights. The day to night range is wide in the dry season The zone where the argument changes hands, and the reason this page refuses a national grade. The sustained pavement temperature case weakens relative to the Terai and thermal cycling becomes a real consideration, so the hardest grades are no longer the automatic answer and the softer end of the viscosity range earns a hearing on a lightly loaded hill road. Against that, the Kathmandu valley itself carries heavy, slow, channelised traffic on a limited network, and heavy slow traffic in a warm valley is a rutting case regardless of altitude. Read the traffic as carefully as the altitude here.
Pokhara and the wettest belt The Pokhara valley and the southern flanks immediately below the Annapurna massif, where the mountains rise abruptly from comparatively low ground The wettest part of the country by a wide margin, with annual rainfall commonly cited well above 3,000 mm and a monsoon that is both intense and long by Nepalese standards Mild and humid; warm summers and cool but not cold winters at valley level The clearest case in Nepal where the governing durability problem is water rather than temperature. Moisture damage and drainage dominate the conversation, and both are answered at mix level with the project aggregate rather than in the binder grade. For packing this is the most aggressive storage environment in the country: uncovered drums here deteriorate visibly within a season, and the working window is bounded by rain more tightly than anywhere else.
The high mountain districts Mustang, Manang, Dolpa, Humla, Jumla and the upper valleys of the Karnali, Solukhumbu and the northern belt generally. Roads reach settlements well above 2,000 m and cross passes above 3,000 m Two distinct regimes. The southern-facing valleys receive the monsoon; the trans-Himalayan valleys north of the main range, such as upper Mustang and parts of Dolpa and Manang, lie in the rain shadow and are arid, with a very different precipitation pattern from the rest of the country The only genuinely cold pavement environment in the country. Winter brings sustained sub-zero night temperatures, snow, and repeated freeze–thaw cycling at the road surface. The diurnal range in the dry season at altitude is extreme by the standards of anywhere else on this page This is the one zone on this site where the low-temperature end of the binder specification is a real design constraint rather than a box in a clause. It has to be said plainly that the IS 73 viscosity grades carry no low-temperature acceptance line at all, so a grade name alone cannot answer a mountain question. Where low-temperature performance genuinely governs, the tool that has a line for it is performance grading, where the low-temperature grade is established by bending beam rheometer testing under AASHTO T313 on material aged in a pressure ageing vessel under AASHTO R28. That is a specification conversation to have with the engineer before the tender is answered, not a substitution to make afterwards. Practically, most high mountain work is also constrained to a short summer window and supplied by pre-positioning, which makes drum condition and storage the dominant logistics question.
The monsoon, taken on its own The whole country, arriving from the south-east and progressing north-west Conventionally from around the second week of June to late September or early October, with the withdrawal later in the east than in the far west. Commonly cited at around eighty per cent of annual precipitation nationally, concentrated into a little over three months Warm and saturated at low altitude; the cloud and rain suppress maxima in the Terai relative to the pre-monsoon peak while raising humidity sharply Not a binder question but a project question that touches every part of a consignment. Asphalt laying is effectively suspended across most of the country for the duration, so the construction season is compressed into the months either side and demand concentrates accordingly. Two consequences for a supplier. Material for a monsoon-side programme has to be pre-positioned before the window closes or brought in immediately after it opens, which makes staged call-off and covered storage the plan rather than a contingency. And a consignment arriving during the monsoon may spend weeks in a yard in heavy rain before it is used, which is the single strongest argument for new steel drums, tight closures and covered storage on this market.
The post-monsoon landslide season The hill belt generally, and the Siwalik and Mahabharat crossings in particular The period during and immediately after the heaviest monsoon rainfall, when slopes are saturated. The risk is a function of rainfall intensity, slope saturation and the young, steep, fractured geology of a tectonically active mountain belt Not a temperature phenomenon Included as a routing consideration described climatically, and deliberately not as a statement about the status of any road. Slope failure risk on Nepalese hill alignments is highest when the ground is saturated, which is a physical description of the terrain and the season rather than an operational claim. The planning response is the same one the season already dictates: move material to the hills outside the saturated months, pre-position rather than call off, and treat any monsoon-period hill delivery schedule as provisional and confirmed with a forwarder in writing. This page states no position on the condition, availability or safety of any route on any date.
The winter fog of the plain The Terai and the northern Indian plain across the frontier, most pronounced in December and January Dry season phenomenon: persistent radiation fog over the Gangetic plain during the coldest weeks Cool, damp and still. Daytime temperatures are suppressed and visibility can be very low for extended periods Relevant because it affects the transport leg on both sides of the frontier at the same time, and because it falls squarely inside the post-monsoon construction window when a buyer most wants material moving. It is not a reason to change a grade. It is a reason to build slack into a delivery schedule for December and January rather than treating a slow week as a failure, and it is a question to raise with a forwarder rather than to discover. Its second effect is on laying: cool, damp, still conditions shorten the compaction window and raise the risk of a mat cooling before it is finished, which is a paving management issue in the Terai winter.
Four planning consequences follow, and they are why this page gives no national grade. First, establish the town and its altitude before agreeing a grade. Nepal contains a rutting-dominated subtropical plain, a moisture-dominated wet hill belt and a genuinely cold mountain zone, and no single grade serves all three. Second, the low-temperature end is a real constraint in Nepal, and only in one zone. That is an unusual conclusion on this site and it is stated deliberately: the viscosity grade system has no low-temperature line, so a high mountain project that needs one has to specify it separately and evidence it separately. Third, the season is shorter than the calendar. The monsoon removes the middle of the year across most of the country and winter removes part of the remainder at altitude, so the practical hill window is narrow and material has to be pre-positioned rather than called off. Fourth, a Nepalese consignment passes through several of these regimes on the way to its site, which matters for the packing and the storage rather than for the grade: material that is fine in a dry Kathmandu compound may have sat in an open Terai yard through a fortnight of monsoon rain to get there.

Specification practice

How a Nepalese tender names its binder, and the trap in reading a penetration grade as a viscosity grade

This is the section where offers into Nepal fail, and the failure is almost never about the material. It is about which property the grade is defined by, and about a certificate that measured the wrong one. The grade tables themselves are on the viscosity grade and India pages linked at the foot of this page; what follows is the part those tables cannot show.

Where Nepalese specification practice comes from

Nepalese road engineering practice sits close to Indian practice. The reasons are structural rather than sentimental: the two networks meet at the frontier, the technical literature, the training and the contracting community overlap heavily, materials and plant move across the same border, and the design lineage that Nepalese standard specifications draw on is the Indian one. In concrete terms, an engineer working on a Nepalese road project is working in a documentary world where the Indian Standards published by the Bureau of Indian Standards, the codes of practice of the Indian Roads Congress and the specification for road and bridge works published by the Indian ministry responsible for road transport and highways are the familiar references, alongside the Nepalese Department of Roads’ own standard specifications and the Nepal Road Standard.

For a supplier the practical consequence is the one that decides how the offer is written: the grade names a Nepalese tender is most likely to use are the IS 73 viscosity grades — VG-10, VG-20, VG-30 and VG-40 — rather than the penetration bands that a Middle East export certificate carries by habit. It is not universal. Older documents, private work, donor-financed projects designed by international consultants and some municipal packages may use penetration designations or something else entirely. But the default assumption for a Nepalese public road tender should be the viscosity system, and an offer that assumes otherwise is answering in the wrong language before anyone has looked at the numbers.

What a viscosity grade actually is, which is not what most exporters think

A penetration grade and a viscosity grade are not two ways of writing the same requirement. They are defined by different properties measured at different temperatures, and the difference is not academic.

  • A penetration grade is a closed band at 25 °C. A designation such as 60/70 means the penetration of the material, measured with a standard needle under a 100 g load for 5 s at 25 °C to IS 1203 or ASTM D5, must fall between 60 and 70 tenths of a millimetre. There is a floor and there is a ceiling. It is a consistency measurement made at a temperature far below the one at which a pavement fails in hot weather.
  • A viscosity grade is defined by absolute viscosity at 60 °C. The grade name is the point: in the IS 73 system the number in VG-10, VG-20, VG-30 and VG-40 corresponds to the nominal absolute viscosity at 60 °C in hundreds of poise, and each grade is bounded by a viscosity band measured to IS 1206 (Part 2), the analogous method being ASTM D2171. Sixty degrees is not an arbitrary temperature; it approximates a hot pavement, which is where a binder is asked to resist rutting. The system was adopted precisely because it grades the material where the material has to work.
  • The penetration line inside a viscosity grade is a minimum, not a band. This is the single most misunderstood feature of the system. IS 73 does specify a minimum penetration at 25 °C for each viscosity grade, but there is no upper bound on it. A grade therefore constrains consistency at service temperature tightly and constrains it at 25 °C only from below.
  • There is also a minimum kinematic viscosity at 135 °C, measured to IS 1206 (Part 3), the analogous method being ASTM D2170. That is the mixing and pumping end of the curve, and it is the line that speaks to whether the material will handle sensibly in a plant.

So a viscosity grade specification is, in effect, a specification of the shape of the temperature–consistency curve: bounded at 60 °C where rutting happens, floored at 25 °C to prevent an over-hard material, and floored at 135 °C to keep the mixing behaviour sane. A penetration grade specifies one point on that curve and infers the rest.

The trap, stated once and with the arithmetic

The trap is the habit of treating VG-30 as a synonym for 60/70 and VG-10 as a synonym for 80/100. Those pairings appear in conversation, in trader emails and in cross-reference tables, and they are useful as rough orientation. They are not equivalences and a certificate for one does not evidence the other. The failure runs in both directions and it is worth setting out both, because a supplier will meet both.

  • A 60/70 certificate does not evidence VG-30. The defining property of VG-30 is absolute viscosity at 60 °C, and a penetration-grade certificate has not measured it. Penetration at 25 °C does not determine viscosity at 60 °C, because two binders with identical penetration can have materially different temperature susceptibility and therefore different viscosities at service temperature. That is not a theoretical possibility; it is the reason the viscosity system was adopted in the first place. A batch can sit squarely in the 60–70 dmm window and fall outside the VG-30 viscosity band, and nothing on a penetration certificate reveals it.
  • A VG-30 certificate does not evidence 60/70 either. Because VG-30’s penetration requirement is a minimum with no ceiling, a compliant VG-30 batch can measure well above 70 dmm and still be a correct VG-30, while failing a literal 60/70 clause outright. It can also measure below 60 dmm — a batch at 50 dmm can satisfy the VG-30 penetration minimum and fail 60/70 at the other end. Either way the substitution fails.
  • The ageing evidence differs too, and this is the line that is most often simply missing. IS 73 controls hardening through a viscosity ratio: the absolute viscosity at 60 °C of the residue from the rolling thin film oven test, measured to IS 9382 with the analogous method ASTM D2872, divided by the absolute viscosity at 60 °C of the original material, with a maximum of 4.0. That single line requires absolute viscosity at 60 °C to be measured twice, before and after ageing. A Middle East export certificate written in the ASTM penetration idiom typically carries loss on heating and drop in penetration from a thin film oven test to ASTM D1754 instead. Those are different exposures measuring a different thing, and no arithmetic converts one into the other. A certificate without absolute viscosity on it cannot evidence a viscosity grade, before or after ageing, and the gap is not closable after the cargo has sailed.
  • The ductility convention differs. In the IS 73 system ductility is specified on the residue after the rolling thin film oven test, measured to IS 1208, the analogous method being ASTM D113. The ASTM penetration-grade convention reports ductility on the original material. A certificate showing a ductility figure with no indication of whether it was run on the original or on the aged residue does not answer an IS 73 clause, and a figure on the original does not answer a requirement on the residue.

What to do about it, in the order that works

  • Quote in the same words the tender uses. If the clause says VG-30, the offer says VG-30. Do not silently offer a penetration grade against a viscosity clause, and do not let a data sheet do it on your behalf.
  • Schedule the absolute viscosity tests before the batch is certified. Absolute viscosity at 60 °C on the original and on the rolling thin film oven residue, plus kinematic viscosity at 135 °C, have to be run and printed. Adding them afterwards is not possible in any useful sense, because the certificate has to describe the material that was loaded.
  • Print the method designation beside every result. Where the tender is written in the Indian idiom, print the IS designation; where the certificate is produced in an ASTM laboratory, print both. A number without a method is a number a destination laboratory cannot reproduce.
  • Where a cross-reference is unavoidable, get it in writing from the engineer before dispatch. A cross-reference table is a basis for a conversation with the engineer. It is never a defence at delivery, and on this route the delivery is at the far end of a foreign transit leg and a mountain road.

The bodies to know, described by what they do

Five institutions are worth a buyer or a supplier being able to name, and they are named here as public bodies rather than as counterparties. None is a counterparty of ours and no relationship with any of them is claimed or implied.

  • The Nepal Bureau of Standards and Metrology is the national standards body, sitting under the ministry responsible for industry, commerce and supplies. Its functions are the ordinary functions of a national standards body: developing and publishing Nepal Standards, operating a national certification mark scheme, acting as the national metrology authority and carrying responsibilities in relation to conformity assessment for goods placed on the market. It is the body a Nepalese tender means when it refers to a national standard.
  • The Department of Roads, under the ministry responsible for physical infrastructure and transport, is the central roads authority for the strategic network. Its standard specifications for road works and its design and construction guidance are the documents from which most Nepalese binder clauses on strategic road projects descend, and its central and regional laboratories are the sort of facility at which a consignment may be verified at destination.
  • A separate central body carries responsibility for local infrastructure and local roads, and since federalisation Nepal’s provincial and local governments also procure road works in their own right. The practical consequence is the ordinary one: there is no single Nepalese procurement practice to quote against, and packages from different authorities can carry different clauses.
  • Public procurement is governed by a national public procurement framework administered by a dedicated monitoring office, which is why a Nepalese tender arrives as a structured dossier with technical and administrative clause books rather than as a purchase enquiry.
  • On the Indian side, the Bureau of Indian Standards is the national standards body that publishes IS 73 and the IS test methods cited throughout this page, and the Indian Roads Congress publishes the codes of practice that much of the design guidance in the region descends from. They matter to a Nepalese shipment twice over: their documents are the technical references a Nepalese clause is likely to cite, and India is the territory the goods physically cross.

This page quotes no Nepalese national standard designation for paving bitumen. The reason is the same as on every market page here. Procurement runs through a central roads department, a local infrastructure body, provincial and local governments and donor-financed projects designed by international consultants, and their documents are not uniform enough to be reduced to one reference. A number quoted from memory into a compliance box on an offer form is a false compliance claim sitting inside a contract, and an invented national standard number is the worst thing a supplier page can print, because it is precise enough for a buyer to rely on and wrong often enough to ruin a shipment. If an enquiry form asks which Nepalese standard the cargo complies with, the honest answer is that the binding requirement is the one the tender document incorporates, and that you will quote against that clause once you have seen it. Ask for the clause. It is a normal request and a serious buyer will send it.

The edition question, which is real here

IS 73 has been revised more than once, and the change from a penetration-based to a viscosity-based grading system is itself the product of a revision. That has two consequences on this market. First, a clause citing IS 73 without an edition is incomplete, because the grade names and the acceptance limits are not identical across editions. Second, older Nepalese documents may still be written in penetration designations inherited from the earlier practice, so a supplier will genuinely meet both systems in the same market and occasionally in the same tender dossier. The response is not to guess which is intended. It is to ask, in writing, which edition of which standard the clause incorporates, and to take the acceptance limits from that text rather than from a data sheet or from memory. The same discipline applies to the modified binder and emulsion standards described below, which have also been revised.

Modified binder, emulsion and cutback in the Indian idiom

These are not exotic corners of a Nepalese catalogue. A country of hill roads, surface-dressed rural network and heavy monsoon patching uses spray-applied products in quantity, and the designation grammar for them is Indian rather than ASTM or European.

  • Polymer modified bitumen in Indian practice is specified under IS 15462. The designation convention in that standard has changed between editions, so the edition the clause cites governs the grade names as well as the limits. The correct response to a clause that says only PMB is to ask which standard, which edition and which grade, and to require the elastic recovery and storage stability evidence that a modified binder specification exists to control rather than accepting the word polymer on a data sheet. Note also the transit consequence: modified binder in bulk wants controlled heating and agitation to stay homogeneous, which is a poor fit for a tanker standing at a land customs station, so on this route modification argues strongly for drums.
  • Bitumen emulsion in Indian practice is specified under IS 8887, with the cationic families designated by breaking behaviour in the rapid, medium and slow setting convention. Two physical cautions for Nepal specifically: an emulsion has a finite storage life and dislikes both heat and prolonged standing, so a consignment that spends weeks on a sea leg, a transit leg and a hill road is exposed to exactly the conditions that break it; and emulsion is the product most likely to be wanted for monsoon and post-monsoon patching, which is the period when the road to the site is least reliable. Where the leg is long, plan the shelf life explicitly and in writing.
  • Cutback bitumen in Indian practice is specified under IS 217. A cutback carries solvent, and its flash point and handling regime are nothing like a paving grade’s, which matters in an open storage yard in a hot Terai pre-monsoon May.

The band is not a point, and here the point is a curve

Two cargoes can both be genuine VG-30 and behave differently on a Nepalese pavement. One sits near the bottom of the viscosity band with a comparatively high penetration; the other sits near the top with a lower one. Both are in grade and both pass a conformity check. On a heavily loaded Terai highway approach or a channelised Kathmandu junction they are not the same material. The practical responses, in order of usefulness: require the measured values on a batch-specific Certificate of Analysis rather than a sheet that reprints the grade limits; agree a narrower contractual window in writing for the shipment, which leaves the grade name and the tender satisfied while giving you a contractual right to the material you actually need; and read absolute viscosity at 60 °C and softening point as hard as you read penetration, because those are the lines that speak to behaviour at service temperature and they are the lines most often skimmed on an export offer.

The transit route adds a second reason to insist. A rejected parcel at an Indian port is a cargo sitting in a foreign country under a transit procedure with a security instrument live behind it. A rejected parcel that has crossed the frontier, been cleared into Nepal, been hauled up a hill road and discharged at a site is a problem with no realistic reverse gear at all. The inspection you did not pay for at the loading point is the argument you cannot win afterwards.

Adulteration, solubility and the discipline of the handover

A Nepalese consignment changes hands more often than almost any other bitumen movement on this site: loading point, vessel, Indian port, transit vehicle or wagon, inland depot at the crossing, stripping, Nepalese vehicle, and a final hill haul that may involve a further transfer to a smaller truck. Each of those is a place where quantity, condition or composition can be argued about. The technical defence is unglamorous and effective. Solubility is the line that shows whether the material is bitumen or bitumen extended with mineral matter; ask for it to IS 1216 or ASTM D2042 with the solvent stated, and if a certificate omits solubility altogether treat that as a finding rather than an oversight. Appoint an internationally recognised inspection company to attend loading, sample across the consignment to IS 1201 or ASTM D140, and seal retained samples held by both parties. Then carry that discipline across the frontier: record drum count, drum condition and seal numbers at every handover, because a recorded count is what closes a quantity argument before it opens, and on this route there are more handovers to record than on any coastal delivery.

Five questions to ask about any Nepalese binder clause

  • Is this a viscosity grade or a penetration grade? Settle it before anything else, because it decides which properties have to be measured and therefore what the laboratory has to do before the batch is certified.
  • Which standard and which edition does the clause incorporate? The grade names and the acceptance limits both live in the cited text, not in the grade name and not in a data sheet.
  • Which ageing procedure is controlled, and is absolute viscosity required on the residue? If the clause controls a viscosity ratio, a thin film oven loss-on-heating line does not answer it and the test has to be scheduled in advance.
  • Does the site need a low-temperature property, and does the cited standard have one? For a high mountain project the honest answer is that a viscosity grade has no low-temperature line, so if one is needed it has to be specified and evidenced separately.
  • Are spray-applied products in the same package? Emulsion under IS 8887 and cutback under IS 217 are separate products with their own acceptance tables, and a paving-grade certificate evidences nothing at all for them.

What a usable Certificate of Analysis looks like for this market

  • Batch or lot identification tying the certificate to the drums actually loaded, not a typical-values sheet reissued for every consignment.
  • Absolute viscosity at 60 °C as a measured value, with the method designation printed beside it. Without this line a viscosity grade is not evidenced, whatever else the certificate says.
  • Absolute viscosity at 60 °C on the rolling thin film oven residue, and the ratio calculated, where the clause controls hardening that way.
  • Kinematic viscosity at 135 °C, penetration at 25 °C and softening point as measured values, each read against any narrower contractual window agreed for the shipment.
  • Ductility with the condition stated — original or aged residue — because the two conventions differ between the systems and a bare figure answers neither reliably.
  • Solubility with the solvent and the designation stated, and flash point with the method stated.
  • Where a modified binder is supplied, the standard, the edition and the grade actually met, with the elastic recovery and storage stability evidence, rather than the word polymer.
  • Nothing about adhesion or water sensitivity. Those are mix-level questions answered with the project aggregate, and no binder certificate can carry them — which matters here because in the wet Nepalese hill belt they are the governing durability questions.

Grade designations

The viscosity grades, what defines each one, and the penetration grade it is habitually confused with

This is the table to read before answering a Nepalese tender. It sets out what each IS 73 viscosity grade is defined by, the penetration grade it is casually treated as equivalent to, and why that treatment fails. The defining property in every case is absolute viscosity at 60 °C measured to IS 1206 (Part 2), the analogous method being ASTM D2171, and the penetration figure is a minimum with no upper bound. The full requirement tables are on the viscosity grade pages linked at the foot of this page; what is set out here is the structural argument those tables do not make.

IS 73 viscosity grades, their defining property, the penetration grades they are habitually read as, and why the reading fails in both directions.
Grade Defining property and band Penetration at 25 °C in the grade Habitually read as Why that reading fails, and in which direction
VG-10 Absolute viscosity at 60 °C, IS 1206 (Part 2) / ASTM D2171, nominally around 1,000 poise with the band set in the cited edition of IS 73. Minimum kinematic viscosity at 135 °C, IS 1206 (Part 3) / ASTM D2170 A minimum only, with no upper bound. The softest of the four grades and therefore the highest penetration minimum 80/100 and, in some conversations, 85-100 Fails in both directions and the softer grades fail worse, because an open-ended penetration minimum on a soft grade covers a very wide range of material. A batch can satisfy the VG-10 penetration minimum and measure far above the top of an 85-100 window while remaining a correct VG-10. And an 85-100 certificate says nothing at all about absolute viscosity at 60 °C, which is the property the grade is defined by. In Indian practice this is the grade associated with spray applications and with cold regions rather than with mainstream hot-plain paving, which is a usage point rather than a substitution rule.
VG-20 Absolute viscosity at 60 °C, IS 1206 (Part 2) / ASTM D2171, nominally around 2,000 poise with the band set in the cited edition. Minimum kinematic viscosity at 135 °C A minimum only, higher than VG-30’s and lower than VG-10’s Nothing in particular, which is itself informative The grade that is specified least often, and worth understanding for exactly that reason. It sits between the spray-and-cold-region grade and the mainstream paving grade, and in practice tenders tend to reach for one or the other rather than for the middle. If a Nepalese clause does name VG-20, do not assume it is a loose way of saying VG-30. Ask, because the viscosity band is genuinely different and the material is genuinely different.
VG-30 Absolute viscosity at 60 °C, IS 1206 (Part 2) / ASTM D2171, nominally around 3,000 poise with the band set in the cited edition. Minimum kinematic viscosity at 135 °C A minimum only, with no upper bound 60/70, almost universally The most consequential pairing on this market and the one that costs the most money. Every part of it is wrong as an equivalence. A 60/70 certificate carries no absolute viscosity measurement, so it cannot evidence the defining property. A compliant VG-30 batch can measure above 70 dmm or below 60 dmm and remain a correct VG-30 while failing a literal 60/70 clause. And the ageing evidence differs: IS 73 controls a viscosity ratio calculated from absolute viscosity before and after the rolling thin film oven test, while a 60/70 export certificate carries loss on heating and drop in penetration from a thin film oven test. The two are different exposures measuring different things. This is the mainstream paving grade for the hot Nepalese Terai, and it is the grade most Nepalese enquiries are actually about.
VG-40 Absolute viscosity at 60 °C, IS 1206 (Part 2) / ASTM D2171, nominally around 4,000 poise with the band set in the cited edition. Minimum kinematic viscosity at 135 °C A minimum only, and the lowest of the four 40-50, or 30/40 heard as a trade designation The hardest of the four grades, associated in Indian practice with heavily loaded pavements, intersections and high-stress locations rather than with general paving. The same failure applies: an ASTM 40-50 certificate is a closed penetration band with no absolute viscosity on it, and a VG-40 requirement is a viscosity band with an open penetration floor. Note also that 30/40 belongs to no current ASTM grade at all; ASTM D946 names 40-50 as its hardest grade, so a 30/40 designation heard in trade is a name without a standard behind it and has to be resolved before it is quoted.
The penetration grades themselves: 40-50, 60-70, 85-100 Penetration at 25 °C, 100 g, 5 s, IS 1203 / ASTM D5, as a closed band with a floor and a ceiling. Ageing controlled by loss on heating and drop in penetration after a thin film oven test, ASTM D1754 The defining property, bounded at both ends VG-40, VG-30 and VG-10 respectively Set out here as the mirror image of the rows above, because a supplier will meet the argument from this side too. The direction of failure is the same: the penetration system has measured consistency at 25 °C and controlled ageing by a different exposure, and neither of those answers a viscosity clause. Where a Nepalese clause genuinely is written in penetration designations — and older documents and some private work are — then a penetration certificate is the right document and a viscosity certificate is the incomplete one. Establish which system the clause is in before deciding which certificate is deficient.
80/100, the trade designation Nothing. It is a trade name rather than a grade in a current standard Not defined by any current standard VG-10, or 85-100 Worth a row of its own because it circulates widely in South Asian trade. ASTM D946 names 85-100 and contains nothing called 80/100. The European standard EN 12591 names the band 70/100 and likewise contains nothing called 80/100. The arithmetic proves the difference: a batch measuring 82 dmm satisfies a literal 80/100 and satisfies EN 12591 70/100 but fails ASTM 85-100 outright, while a batch at 74 dmm satisfies 70/100 and fails both of the others. On a Nepalese enquiry the right response to 80/100 is to ask which requirement table the clause intends and settle it in writing before certification, not to pick the nearest thing and hope.
Performance grades, PG 58-16, PG 64-10 and the rest Two numbers: a high-temperature grade and a low-temperature grade, established under the AASHTO M320 framework with dynamic shear rheometer testing under AASHTO T315, pressure ageing under AASHTO R28 and bending beam rheometer testing under AASHTO T313 Not a defining property of the system at all Nothing in the IS 73 system, because there is no equivalent Included because of the one Nepalese question the viscosity system cannot answer. A viscosity grade has no low-temperature acceptance line, so for a high mountain site where winter cracking is a genuine design risk the grade name carries no information about the property that governs. Performance grading is the framework that does carry it, in the second number. This is a specification conversation to have with the engineer before the tender is answered, and it is not a substitution to be made unilaterally: a PG certificate does not evidence an IS 73 grade any more than the reverse.
Three things to do with this table. First, establish which system the clause is written in before comparing anything. A viscosity grade and a penetration grade are not two names for one requirement, and the failure is not a near miss on a number — it is a property that has not been measured at all. Second, never substitute silently. Quote in the same words the tender uses, state on the offer which standard and which edition the material is certified to, print the measured absolute viscosity, kinematic viscosity, penetration and softening point from a batch-specific Certificate of Analysis, and obtain the engineer’s written approval for any cross-reference before dispatch. A cross-reference is a basis for a conversation with the engineer; it is never a defence at delivery, and on this route delivery is at the far end of a transit leg and a hill road. Third, settle the ageing evidence at the same moment as the grade, because that is the divergence a grade-name comparison hides entirely and it is the one that cannot be corrected after loading. Nothing in this table is a supplier’s published value: the defining properties are those the cited standards define, and the binding specification for any shipment is the one written into the sales contract and evidenced by the batch Certificate of Analysis.

Technical data

The two grades a Nepalese tender usually names, line by line, with the method that produces each

Where a Nepalese clause is written in the viscosity system, the argument sits between VG-30 for the hot Terai and the mainstream network and VG-10 for spray applications and for cold-region work. The two columns below set them side by side with the test methods that produce each line, given in the Indian Standard designation first because that is what a Nepalese or Indian clause will cite, with the analogous ASTM method beside it so that a certificate produced in an ASTM laboratory can be read across. Where a line is an acceptance requirement of IS 73 it is described as such; where it is a value commonly published on export data sheets rather than a requirement of the grading standard, that is stated explicitly. Acceptance limits for any shipment come from the edition of the standard the tender incorporates, not from this table.

Requirement and reporting lines for Bitumen VG-30 and Bitumen VG-10, with the Indian Standard test method and its ASTM analogue for each.
Property Test method: IS, and the ASTM analogue Unit Bitumen VG-30 Bitumen VG-10
Absolute viscosity at 60 °C — the defining property of the grade IS 1206 (Part 2) / ASTM D2171 poise 2400–3600 800–1200
Kinematic viscosity at 135 °C IS 1206 (Part 3) / ASTM D2170 cSt (mm²/s) 350 min 250 min
Penetration at 25 °C, 100 g, 5 s IS 1203 / ASTM D5 dmm (0.1 mm) 45 min, with no upper bound in the grade 80 min, with no upper bound in the grade
Softening point, ring and ball IS 1205 / ASTM D36 °C 47 min 40 min
Flash point, Cleveland open cup IS 1209 / ASTM D92 °C 220 min 220 min
Solubility in trichloroethylene IS 1216 / ASTM D2042 wt % 99.0 min 99.0 min
Resistance to hardening: viscosity ratio at 60 °C after the rolling thin film oven test IS 1206 (Part 2) on the residue from IS 9382 / ASTM D2171 on the residue from ASTM D2872, AASHTO T240 ratio 4.0 max 4.0 max
Resistance to hardening: ductility of the residue at 25 °C, 5 cm/min IS 1208 on the IS 9382 residue / ASTM D113 on the ASTM D2872 residue cm 40 min 75 min
Loss on heating and drop in penetration, the ASTM penetration-grade convention ASTM D1754 (thin film oven), with ASTM D5 on the residue wt % and % of original Carried by default on Middle East export certificates. It is not the ageing control IS 73 uses and the two are not interchangeable Carried by default on Middle East export certificates. It is not the ageing control IS 73 uses and the two are not interchangeable
Specific gravity at 27 °C IS 1202 / ASTM D70 Reported on the certificate. Commonly published in the region of 1.0 for paving grades; take any acceptance limit from the cited standard Reported on the certificate. Commonly published in the region of 1.0 for paving grades; take any acceptance limit from the cited standard
Water content IS 1211 / ASTM D95 vol % 0.2 max as commonly published; take the acceptance limit from the cited edition 0.2 max as commonly published; take the acceptance limit from the cited edition
Ductility at 25 °C on the original material IS 1208 / ASTM D113 cm An ASTM penetration-grade convention. Where a figure is quoted, state whether it was run on the original or on the aged residue, because the two conventions are not interchangeable As for VG-30
Low-temperature performance No line exists in the viscosity grading system. Where required: AASHTO T313 bending beam rheometer on material aged under AASHTO R28, within the AASHTO M320 framework °C Not specified by the grade. For a high mountain site it has to be specified and evidenced separately Not specified by the grade. For a high mountain site it has to be specified and evidenced separately
Sampling of the consignment IS 1201 / ASTM D140 Sample across the consignment at loading, with sealed retained samples held by both parties Sample across the consignment at loading, with sealed retained samples held by both parties
Affinity between binder and aggregate, and moisture damage in the mix Mix-level testing with the project aggregate No binder certificate evidences this. It governs durability in the wet Nepalese hill belt and has to be commissioned separately No binder certificate evidences this. It governs durability in the wet Nepalese hill belt and has to be commissioned separately
Five points of detail, and on this market they decide whether an offer survives. First, the absolute viscosity rows are the ones to settle before anything else. They are the defining property of the grade, they appear on no penetration-grade export certificate, and they have to be scheduled before the batch is certified rather than added afterwards. Second, the ageing control is a ratio, not a loss. Calculating it requires absolute viscosity at 60 °C on the original and on the rolling thin film oven residue, and a thin film oven loss-on-heating line does not substitute for it in any degree. Third, acceptance limits come from the edition of the standard the tender cites. IS 73 has been revised, the grading basis itself changed at one of those revisions, and a clause citing the standard without an edition is incomplete; ask, and take the limits from that text rather than from a data sheet or from this page. Fourth, the penetration line is a floor and not a band, which means the grade permits a wider spread of material at 25 °C than a buyer used to penetration grades expects. Where the position within that spread matters — and on a loaded Terai highway or a channelised Kathmandu junction it does — agree a narrower contractual window in writing for the shipment and require the measured value on a batch-specific Certificate of Analysis. Fifth, and stated as an honest limit rather than an omission: the viscosity grading system has no low-temperature acceptance line, so it cannot answer the question a high mountain project has to ask. Raise that with the engineer before the tender is answered. The binding specification for any shipment is the one written into the sales contract and evidenced by the batch Certificate of Analysis.

Grade selection

Choosing the binder for a Nepalese site, by altitude and by load

Grade choice in Nepal is driven by a temperature case that weakens as the road climbs and a low-temperature case that appears only at the top. Decide which zone the site is in and how heavily it is loaded before deciding the grade, and treat these as the direction of travel for a conversation with the engineer rather than as a substitute for the tender document. Every card below names the grade in the system a Nepalese clause is most likely to use.

1

Bitumen VG-30

The mainstream grade for the Nepalese Terai and for most of the strategic network, and the grade most Nepalese enquiries are actually about. It is the sound default where pre-monsoon maxima reach around 40 °C on a plain that behaves exactly like the northern Indian plain across the frontier, and where rutting is the governing failure mode. Two things to insist on. Require absolute viscosity at 60 °C as a measured value on the batch certificate, because it is the property the grade is defined by and it is absent from every penetration-grade export sheet. And require the measured penetration too, because the grade floors it without capping it, so a compliant batch can be materially softer than a buyer expecting 60/70 assumes.

2

Bitumen VG-40

The harder grade, associated in the practice this market draws on with heavily loaded pavements, intersections and high-stress locations rather than with general paving. In Nepalese terms that means a predictable and identifiable set of places: the Terai highway approaches to the border crossings, the truck standing and turning areas around Birgunj, Bhairahawa, Biratnagar and Nepalgunj, the loaded sections of the East–West Highway, and channelised junctions in the larger Terai towns where slow heavy vehicles sit on hot pavement. It is an answer to load and heat together, not to heat alone, and specifying it for a lightly trafficked hill road buys stiffness where flexibility would serve better.

3

Bitumen VG-10

The softest of the four grades, associated in this tradition with spray applications and with cold-region work rather than with mainstream hot-plain paving. Both of those uses are real in Nepal: a large part of the rural and hill network is surface dressed rather than surfaced in dense asphalt, and the hill and mountain belt is genuinely cooler than the plain. Two cautions. Its penetration requirement is a minimum with no ceiling, which on a soft grade covers a very wide range of material, so the measured value matters more here than on any other grade. And do not let the cold-region association be read as an answer to a high mountain low-temperature problem: the grade has no low-temperature acceptance line, and softer is not the same as certified for cold.

4

Bitumen VG-20, and why it is rarely named

The grade that sits between the spray-and-cold-region grade and the mainstream paving grade, and the one specified least often. It is included here for a practical reason rather than a technical one: if a Nepalese clause does name VG-20, do not assume it is a loose way of writing VG-30 and do not assume a VG-30 certificate will be accepted against it. The viscosity band is genuinely different and so is the material. Ask the engineer, confirm the edition of the standard the clause cites, and quote against that rather than against the grade you have available.

5

Polymer modified binder

The realistic answer where the pavement is both hot and heavily loaded, which in Nepal means the Terai highway sections carrying loaded freight, the approaches and standing areas at the border crossings, and the busiest urban junctions. In Indian practice, which Nepalese practice follows here, polymer modified bitumen is specified under IS 15462, and the designation convention has changed between editions of that standard, so the clause has to name the edition and the grade rather than the word polymer. Require the elastic recovery and storage stability evidence the specification exists to control. One route-specific consequence: modified binder in bulk wants controlled heating and agitation to stay homogeneous, which is a poor fit for a tanker standing at a land customs station on a transit movement, so on this corridor modification argues strongly for drums.

6

The high mountain case, and the honest limit of a grade name

The one Nepalese question the viscosity system cannot answer, and it is better to say so than to sell around it. In the high mountain districts winter brings sustained sub-zero nights, snow and repeated freeze–thaw at the surface, and the governing risk moves from rutting to low-temperature cracking and durability. No IS 73 grade carries a low-temperature acceptance line, so no grade name evidences performance against that risk. The framework that does carry it is performance grading, where the second number is established by bending beam rheometer testing under AASHTO T313 on material aged under AASHTO R28 within the AASHTO M320 framework. Raise it with the engineer before the tender is answered. A PG certificate does not evidence an IS 73 grade either, so this is a specification decision rather than a substitution.

7

Emulsions and cutbacks for the hill network

These belong on a Nepalese page more than on most, because a large share of the rural and hill network is surface dressed, every square metre of new granular base wants a prime coat, and monsoon and post-monsoon patching is a recurring national workload rather than an occasional one. In the Indian idiom that Nepalese practice follows, cationic bitumen emulsion is specified under IS 8887 with the rapid, medium and slow setting families, and cutback bitumen under IS 217. Two cautions specific to this route. An emulsion has a finite storage life and dislikes heat and prolonged standing alike, and a consignment that spends a sea leg, a transit leg and a hill road getting to site is exposed to exactly the conditions that break it, so buy close to the point of use or plan the shelf life explicitly. And a cutback carries solvent, with a flash point and a handling regime nothing like a paving grade’s, which matters in an open Terai storage yard in May.

Season, packing and handling

The monsoon window, the hill road and why drums win on this route

Packing on most markets is a cost decision. On this one it is decided by three things in sequence: how long the season is, how many times the cargo is handled between the vessel and the site, and what size of vehicle the last road will accept. All three point the same way, and the arithmetic below is where a Nepalese enquiry should start rather than finish.

The season is shorter than the calendar, and it is shorter still in the hills

Nepal’s construction year is bounded at both ends. The south-west monsoon conventionally arrives in the east around the second week of June and withdraws around late September or early October, later in the east than in the far west, and the great majority of the year’s precipitation — commonly cited at around eighty per cent nationally — falls inside that window. Asphalt work is effectively suspended across most of the country for the duration. That leaves a working year in two pieces: a long post-monsoon and winter period from roughly October to May in the Terai, and a much shorter usable window in the hills and mountains where winter takes a further bite out of the cold end.

Three planning consequences follow, and they shape the commercial conversation more than any technical point on this page.

  • Demand concentrates. Everybody is working in the same months, which means plant, haulage, labour and material are all under simultaneous pressure in the same weeks. A buyer who orders when the window opens is ordering at the same moment as every other buyer in the country.
  • Material has to be pre-positioned rather than called off. The normal pattern on a Nepalese hill or mountain project is to move quantity to the site or to a nearby depot while the road allows, and draw it down through the season. That makes storage behaviour, drum integrity and the ability to heat one unit at a time far more valuable than a saving on packaging.
  • A consignment that misses a window waits for the next one. This is different from arriving late. A cargo that reaches the frontier as the monsoon breaks is a cargo that will sit somewhere until the season reopens, and where it sits, under what cover, and at whose cost is a question to settle in the contract rather than in an argument.

There is a further timing feature of this market that no purely climatic account captures. Nepal’s official year runs on the Bikram Sambat calendar, and the government fiscal year runs from mid-July to mid-July, so the fiscal year end falls at the close of Ashadh, in mid-July — which is a month into the monsoon. Public spending, contract completion and payment deadlines therefore concentrate into the weeks when the weather is worst and the roads are least reliable. A supplier who does not know this reads the resulting rush as unreasonable rather than as structural. A supplier who does know it plans deliveries to arrive well before it. The calendar point has a documentary edge too: dates on Nepalese official documents may be expressed in Bikram Sambat rather than in the Gregorian calendar, and a contract or a credit that does not say which calendar governs a date has an ambiguity in it. Fix it in writing.

The landslide season, described as what it is

The hill belt of Nepal is young, steep and tectonically active, and the road alignments that connect the Terai to the hills are cut into slopes of exactly that character. When those slopes are saturated, which is during and immediately after the heaviest monsoon rainfall, slope failure risk on hill alignments is at its highest. That is a description of terrain and season, and this page states it as such. It is not a statement about the condition, availability or safety of any road on any date, and no supplier page is in a position to make one.

The planning response is the same one the season already dictates and it does not require any operational claim to justify it: move material to hill destinations outside the saturated months, pre-position rather than call off, treat any monsoon-period hill delivery schedule as provisional, and get current routing advice from a freight forwarder in writing and dated. Where a delivery term commits a seller to a hill destination during the monsoon, the risk allocation for delay caused by route conditions should be written into the contract rather than left to be argued afterwards.

How many times the cargo is handled, which is the packing argument in one line

Count the handling events on a Nepalese consignment and the packing decision makes itself. Loading at origin. Loading to the vessel. Discharge at the Indian port. Loading to a transit vehicle or wagon. Movement across a foreign country under a customs procedure. Arrival at the crossing and presentation at a land customs station. Clearance into Nepal. Stripping at an inland clearance depot. Loading to a Nepalese vehicle. The Terai leg. Frequently a transfer to a smaller vehicle for the hill leg. Delivery to a site that may have no mechanical handling at all.

That is more handovers than almost any other movement described on this site, and each one is a place where a count can be disputed, a package can be damaged and a seal can be broken. A packing format that fails locally is worth a great deal on a route like this, and a format that fails globally is a catastrophe with no reverse gear. That is the whole argument for drums, and everything below is detail on it.

Drums against bulk, decided by the route rather than by preference

  • Bulk requires heated storage at the destination. A heated road tanker is only useful if the receiver has tankage of adequate capacity, a compatible discharge connection, a pump and the ability to take the whole load promptly. A contractor running a plant on a hill road project above Butwal or beyond Surkhet has none of that, and no freight quotation changes it.
  • A tanker holds temperature badly across a long leg with a frontier on it. Time standing at a land customs station is time cooling, and a transit movement is a procedure with steps in it rather than a continuous run. Reheating a load that has stiffened is an operational problem with a cost and a risk attached, not a delay.
  • Bulk sits badly with a transit procedure. A movement running under customs security to a nominated station is not one in which product can conveniently be split between two receivers or partly discharged en route, because the mechanism rests on the goods that arrive being demonstrably the goods that entered. That is structural, not administrative.
  • The hill road sets the vehicle, and a tanker cannot be made smaller. This is the Nepal-specific point that does not arise on a plains corridor. Drums can be transferred to whatever vehicle the last climb accepts, in whatever quantity that vehicle takes, as many times as the road requires. A bulk load is one indivisible unit that either fits the whole route or does not.
  • A drum fails locally. A damaged drum costs one drum out of eighty. A compromised bulk load costs the consignment, in a country the seller cannot easily reach, at the end of a transit procedure.
  • Drums allow staged call-off and covered storage. On a project fed through a season bounded by monsoon at one end and winter at the other, the ability to take material in the quantity the site can use, store the rest under cover and heat it one unit at a time is worth more than the packaging saving.

Where bulk does deserve a hearing is in the Terai, at a fixed plant with permanent heated tankage, close to a crossing, outside the monsoon. That is the honest boundary and it is a narrow one: a short plains leg to an equipped plant argues for bulk; a transit movement to a hill site argues for drums, and nothing in between changes the logic.

The packing arithmetic, and then the vehicle

Site standard loading figures, which apply to the sea leg and to any container movement inland, are as follows. New steel drums of 150 kg net give 80 drums and 12 MT per 20 ft FCL. Drums of 180 kg net give 80 drums and 14.4 MT. Drums of 185 kg net give 80 drums and 14.8 MT. Jumbo or poly bags of 1 MT give 20 bags and 20 MT. The 20 ft box is the unit because a cargo of this density reaches its weight limit long before it fills a larger container.

Use these figures to fix the drum count, the packing cost per tonne and the number of packages on the transport document. Then convert tonnage into vehicles with the forwarder rather than with a calculator, because on this route the conversion happens at least twice — once for the Indian transit leg and again for the Nepalese leg, which may itself split at the foot of the hills. No payload figure appears anywhere on this page. What a specific vehicle and trailer combination may lawfully carry on a specific alignment in either country is a matter for the carrier through the forwarder, and the practical limit on a Nepalese hill road is frequently geometric rather than legal.

Jumbo bags, and where they fit here

The 1 MT poly bag is efficient on paper: 20 MT in a 20 ft box against 14.8 MT in drums at 185 kg, which is a real difference in freight per tonne. It fits this market least well at exactly the point where the freight saving would matter most. A 1 MT bag needs mechanical handling at every point it is moved, and the handling chain on this route ends at sites that frequently have none. It also has to be melted as a unit rather than drawn down, which is the opposite of what a staged call-off through a compressed season wants. Where the destination is a fixed Terai plant with handling equipment and a melting arrangement suited to bags, they are worth pricing. Where the destination is up a hill road, the 180 or 185 kg drum is the practical unit and the freight difference is the price of getting the material to the site at all.

Two physical points about drums that are specific to a monsoon country

First, specify new steel drums in the contract, in words rather than by implication. Reconditioned drums are the most common source of contamination disputes in this trade anywhere, and a cargo that changes hands at a port, a transit vehicle, a frontier, a stripping yard and a hill transfer gives that argument five places to start. On a viscosity-graded market the argument is harder to close after the fact, because a destination laboratory testing absolute viscosity on a suspect sample is testing a property the buyer may never have had an original measurement of unless the certificate carried one.

Second, and this is the point most often left off a packing specification for a monsoon destination: drums are filled hot and the block shrinks as it cools, leaving a shallow depression in the top head. In a Nepalese monsoon that depression collects rainwater. A drum with water sitting on the block that is charged into a melter produces violent foaming and boil-over when the water flashes to steam under a layer of hot bitumen. That is a safety point rather than a quality point, and it applies with full force to a market where material is routinely pre-positioned and stored through or immediately after the wet season. Covered storage, drums stored on dunnage rather than on wet ground, closures checked before storage and heads cleared before charging are the ordinary precautions, and they should be written into the delivery instructions rather than assumed.

One regulatory line to settle before a tanker is booked

Where bitumen is offered for carriage at or above 100 °C it may fall to be classified as UN 3257, elevated temperature liquid, n.o.s., Class 9 under the UN model regulations, while packed bitumen moving at ambient temperature is treated differently. Whether that applies to your movement, and what marking, documentation, equipment and driver qualification follow from it in each country on the route, is a question for the carrier and the forwarder. On this route the phrase each country is doing real work: a movement that crosses a frontier is a movement subject to two national implementations of the transport rules, and a classification question answered for one leg has not been answered for the other.

Standards, conformity, customs and documents

The conformity mechanism, the customs machinery, and the question that only a transit country raises

This is the section where an undated web page can do the most damage, so it is written to describe mechanisms rather than to state current positions. Read it to understand how the system works and what it will ask of you. Then get the current answer, in writing and dated, from a licensed customs broker in Nepal — and, on this route, ask a second set of questions about the country the goods merely pass through.

Who the standards body is, and what it does

Nepal’s national standards body is the Nepal Bureau of Standards and Metrology, sitting under the ministry responsible for industry, commerce and supplies. Its functions are the ordinary functions of a national standards body: it develops and publishes Nepal Standards, it operates a national certification mark scheme under which a manufacturer may be licensed to apply the mark to a product, it acts as the national metrology authority, and it carries responsibilities in relation to conformity assessment for goods placed on the Nepalese market. It is the body a Nepalese tender means when it refers to a national standard, and it is a public body rather than a counterparty of ours; nothing in this section describes a relationship with it or with any other authority named on this page.

The conformity mechanism, described as a mechanism

Schemes of this family work in a broadly consistent way wherever they appear, and understanding the shape of one is more useful than a claim about its current content. The common structure is this:

  • The trigger is scope. A scheme applies to a defined list of products, usually expressed by product category and by tariff classification. Whether a given product is inside or outside that list at a given moment is the whole question, and it is the question this page will not answer.
  • The obligation may attach to the manufacturer, the importer or both. Certification mark schemes typically license a manufacturer against a standard and a quality system; import-side schemes typically require the importer to produce evidence at entry. Which applies determines who has to act and when, and it is frequently the exporter rather than the importer who has to move first.
  • The evidence is a test report against a named standard, and the standard matters. A scheme verifies against a specified requirement table, and on this market that table is likely to be written in the Indian idiom with IS test methods. Test reports produced only against ASTM methods may not answer it, and reports missing absolute viscosity certainly will not answer a viscosity-graded requirement. Establish which standard any verification will run against at the same moment you establish whether verification applies at all.
  • Marking and labelling can be part of it. Where a scheme requires a mark, a declaration or particular label content, that is a physical obligation settled before packing rather than after, and a drum already filled and stencilled is an expensive place to discover it.
  • The consequence of getting it wrong is not a warning letter. Where evidence is required and absent, the usual outcomes are detention of the goods, inspection and testing at the importer’s cost and time, penalties, or refusal of entry. On this route that penalty lands on a cargo that has already completed an ocean voyage and a transit movement across a foreign country, in a place where reversing the movement is not a practical option.

Why this page does not tell you whether bitumen is in scope

Because the scope of schemes of this kind changes. Product lists are amended, tariff lines are added and removed, appointed bodies are re-tendered and replaced, and available routes are revised. An undated page asserting that a product is or is not currently in scope, or naming a currently appointed inspection agent, is worse than useless: it is a statement precise enough for a buyer to plan a shipment on and wrong often enough to ruin one. So this page names no current scope and no appointed agent.

Put these questions in writing to a licensed customs broker in Nepal before you contract, and put them again if the shipment slips:

  • Is this product, under this description and this tariff classification, subject to any certification, conformity, quality-control or import-permit requirement in Nepal on my intended shipment date?
  • If it is, what has to be produced, by whom, against which standard and which edition, and at what point in the shipment sequence?
  • What evidence will the customs office at the crossing I am actually using expect, and does that answer change with the crossing?
  • Is any laboratory verification carried out at destination, against which methods, and what happens to the cargo while it is pending?

The question that only a transit country raises, and which almost nobody asks

Here is the point that distinguishes a Nepalese shipment from every coastal one described on this site. The goods cross India, and India has its own standards, certification and import-control machinery. The Bureau of Indian Standards is the Indian national standards body, and India operates product certification and quality-control mechanisms of its own. A cargo entered for home consumption in India would fall to be considered against whatever of that machinery applies to it.

Goods moving under a customs transit procedure are, by the nature of the procedure, not entered for home consumption in the transit country. Whether that means no Indian requirement attaches to them, and whether any documentary, marking or handling requirement nonetheless applies to goods in transit as distinct from goods imported, is a question for a licensed customs broker and not a question this page answers. It is raised here because it is real, because it is specific to a landlocked destination, and because it is the question that is systematically omitted from generic supplier pages and from most enquiry checklists. Ask it explicitly, in these terms, of a broker on the Indian side as well as one in Nepal, and get the answer in writing and dated. Discovering it at a port with a transit security instrument live behind the movement is the expensive way to find out.

Customs on the Nepalese side

Nepal’s customs administration sits under the ministry responsible for finance and operates customs offices at the border crossings and at the inland clearance depots. Declarations are lodged electronically through a customs system of the UNCTAD ASYCUDA family, and the import declaration is known locally as the pragyapan patra. Importers are ordinarily required to hold the registrations the customs and central bank framework specifies, which commonly include tax registration and an export–import code; which registrations a particular buyer needs, and what evidence the seller must provide to support them, is a broker question.

Two structural points matter to a seller. The first is that the file is opened before the goods arrive, which means the importer needs the commercial documents from the seller earlier than a first-time exporter expects, and on this route earlier still, because the transit declaration on the Indian side draws on the same documents at a still earlier point. Late or inconsistent seller documentation does not merely delay a clearance; it can stop the transit movement from being lodged at all, in a country where neither party is standing. The second is that petroleum bitumen falls under HS heading 2713.20, and the full national subheading and any duty, levy, tax or excise treatment must be confirmed with a licensed customs broker in Nepal. No rates of any kind are stated on this page.

Payment, foreign exchange and the credit

Import payment in Nepal is regulated through the framework administered by the central bank, and a documentary credit is the ordinary instrument for a cargo of this character. Three cautions, each of which has caught a Nepalese shipment.

  • Draft the credit against the documents the movement will actually generate. A movement that ends at an inland place in Nepal does not generate the same transport document as a movement that ends at a quay, and a credit calling for a marine bill of lading covering delivery to Birgunj has a contradiction inside it that a bank will find.
  • Do not call for a document that only exists in the destination as a condition of a payment made before arrival. This is a common and avoidable structural error and it locks a seller out of payment for reasons neither party intended.
  • Fix the goods description once and never let it drift. The description must be word for word identical across the contract, the credit, the invoice, the packing list, the transport document, the certificate of origin, the certificate of analysis and every customs declaration on both sides of the frontier. A description that changes between documents is the commonest self-inflicted cause of a hold anywhere in the world, and on this route it is also the slowest and most expensive to correct.

Insurance, and the one question the transit leg adds

The insurance argument is set out in the transit section above and is not repeated here. What belongs in a customs and documents section is the single question the frontier adds to it: the policy has to be capable of responding in both customs territories, and a claim arising on the Indian leg arises while the goods are under a transit procedure that neither the Nepalese buyer nor the seller controls. Establish before the cover is placed who has insurable interest at each stage of that movement, who can present a claim in the transit country, and whether the certificate of insurance the credit calls for names a place beyond the port. A policy expressed to a port is a policy expressed to the wrong end of the journey on this route.

Other authorities and requirements a buyer may encounter

Petroleum products in Nepal sit within a supply and regulatory framework administered through the ministry responsible for industry, commerce and supplies and the bodies under it, and environmental and workplace controls on the storage and handling of hot petroleum products may attach to a terminal, a depot or a plant. Whether any licensing, permitting, registration or notification obligation attaches to the import, storage or handling of bitumen as a petroleum product in Nepal, and to whom it attaches, is a question for a Nepalese legal adviser and a licensed customs broker. This page states no position on it, and nothing here is legal, customs, regulatory, insurance or compliance advice.

Language, calendar and the small things that cause real disputes

  • Nepali is the official language and English is widely used in technical and commercial work. Where a tender or a contract exists in two versions, establish in writing which version governs in the event of a discrepancy, because a translated specification that softens or hardens a limit is a contractual problem waiting to surface.
  • Dates may be expressed in the Bikram Sambat calendar. Official documents, contract milestones and fiscal deadlines commonly run on it, and the Nepalese fiscal year runs mid-July to mid-July rather than on a Gregorian year. A date on a document without a stated calendar is an ambiguity, and in a credit or a delivery schedule it is an expensive one. State the calendar.
  • Units and conventions. Print units beside every value on a certificate, print the test method designation beside every result, and where a value could be read in more than one convention write it in a way that cannot be. This matters more on a viscosity-graded market than on a penetration one, because absolute viscosity in poise and dynamic viscosity in pascal seconds are related by a factor and a certificate that omits the unit is a certificate that will be misread.

What to give a Nepalese buyer at enquiry stage

A serious offer into this market answers questions the buyer has not yet asked, and there are five that recur. State which gateway and which crossing the price is built on. State which side of the frontier the named place in the delivery term sits on. State which standard and which edition the material is certified to, and confirm that absolute viscosity at 60 °C will appear as a measured value on the batch certificate. State whether the box goes inland or is stripped at the crossing, because that decides the buyer’s detention exposure. And state plainly what the offer does not cover — the conformity position, the transit arrangements and the operating status of any route — and point the buyer to the parties accountable for those answers. An offer that does this is easier to compare, and on a route with this many moving parts, easier to compare is the whole competitive advantage.

Documentation

One consignment, two customs files: what changes between the Indian transit leg and the Nepalese import

This is where a Nepalese transaction most often goes wrong, because a buyer, a seller or a bank reuses a template built for a coastal delivery. The two files share a core — invoice, packing list, certificate of origin, safety data sheet, certificate of analysis, transport document — but almost everything around that core is different, and the two are opened at different times by different parties in different countries. Read this table before a letter of credit is drafted, not after it is issued.

How the documentary and commercial position differs between the Indian transit leg and the Nepalese import of the same consignment.
Item On the Indian transit leg On the Nepalese import Why the difference matters
Party of record The party lodging the transit declaration for the movement across India, acting through an Indian clearing agent. This is not an importer, because there is no import A Nepalese importer with the registrations Nepalese law requires, declaring the goods at the customs office facing the crossing This is the structural difference from which everything else follows. It decides who lodges what, whose identity appears on which declaration, whose agent acts in which country, and who can lawfully take delivery where. A seller who has not established both cannot write a coherent contract.
Customs procedure A transit procedure that suspends duties and taxes on the basis that the goods will leave at a nominated point. Not an entry for home consumption Entry for home consumption in Nepal, with charges assessed and settled and the goods released into free circulation These are two different procedures on one consignment, not one procedure at two addresses. Confusing them at the enquiry stage produces a quotation that cannot be executed and a delivery term that cannot be honoured.
The transit instrument A customs transit declaration for the movement from the port of landing to the nominated land customs station, in the form the current arrangements specify Not applicable; the transit procedure is discharged at the frontier and the Nepalese declaration begins The instrument exists only on one side and it is the document that first-time exporters have never produced. Its current form and requirements are for a licensed broker, and nothing here describes them.
Security for the movement A bond, bank guarantee or equivalent standing in for the suspended duties until the goods are accounted for at the exit point. It has a value and a cost, and somebody provides it Not applicable; duties are assessed and settled rather than secured Frequently invisible in a first quotation and always real. Ask at enquiry stage who provides it, what it costs and when it is released, because the answer changes the delivered cost and the cash flow.
Route and exit point Nominated. The movement runs from a stated port to a stated land customs station and is not redirected en route Determined by which crossing the transit movement was nominated to This is why the crossing has to be chosen before the port and before the contract. A cargo cannot be re-aimed at a different crossing because a buyer changed site, and it cannot be split across two crossings because a buyer has two sites.
Transport document Covers the sea leg to the Indian port, with the inland movement documented separately according to the mode used The goods arrive by road or, at Birgunj, potentially by rail to the inland container depot A credit that calls for a marine bill of lading evidencing delivery to a Nepalese inland place is asking for a document that does not exist. Settle at drafting stage which document will be presented for which leg.
Delivery term Sea rules are coherent only as far as the port of discharge Any-mode rules only: FCA, CPT, CIP, DAP, DPU or DDP, naming a precise inland place and stating which side of the frontier it is on DAP Nepal is not a delivery term. A term naming Raxaul ends in India; a term naming Birgunj ends in Nepal. That difference is the part of the journey a Nepalese buyer most wants priced, and leaving it ambiguous is how a delivered price stops being delivered.
Commercial invoice and packing list Support the transit declaration and travel with the movement Support the Nepalese declaration and the assessment One set of facts, used twice, in two systems, at two times. Any inconsistency between the copies is a hold, and the correction has to be made in a country where neither party is standing. Fix the goods description word for word at contract stage.
Certificate of origin Presented with the transit documents as part of the consignment’s paperwork Presented with the Nepalese declaration; origin can matter to tariff treatment and to any preferential arrangement the buyer claims Whether any preferential treatment is available, and what form of origin evidence supports it, is a question for a licensed broker in Nepal. No rates and no preference positions are stated on this page.
Certificate of Analysis Travels with the consignment but is not the transit country’s concern The document the tender, the engineer and any destination verification will be read against On this market the certificate has to carry absolute viscosity at 60 °C as a measured value, and the viscosity of the rolling thin film oven residue where the clause controls hardening that way. A certificate written in the penetration idiom does not evidence a viscosity grade, and the gap cannot be closed after loading.
Safety data sheet and labelling Relevant to the carriage of the goods across the transit country and to any classification applying to the movement Relevant to the import, to storage and to the receiving site Where bitumen is carried above 100 °C the UN 3257 elevated temperature liquid classification may apply, and it applies under two national implementations of the transport rules rather than one. Whether any language or format requirement attaches to the documents in Nepal is a broker question.
Conformity or certification evidence Whether anything attaches to goods in transit as distinct from goods imported is a question for a licensed broker on the Indian side Whether any Nepalese certification, conformity or import-permit requirement applies is a question for a licensed broker in Nepal The question has to be asked twice, of two brokers, about two territories, and this page states no position on either. It is the single most commonly omitted question on a landlocked shipment and the one with the least recoverable consequences.
Insurance Marine cover to the port, then inland transit cover across the transit country Inland transit cover continuing across the frontier to the named place, and any local placement requirement A policy that lapses at the frontier leaves the most handling-intensive segment uncovered. Arrange cover to the named place in the delivery term, not to the port, and confirm any local placement requirement before agreeing CIF or CIP.
Container return The box travels inland with the cargo unless it is stripped at the crossing If the box crosses the frontier, it has to come back across it Detention runs while the box is inland and the round trip includes a customs frontier. Stripping at an inland depot near the crossing and moving drums onward is a routine plan, and it has to be decided before booking because it changes the packing, the handling count and the insurance.
Four things to take from this table. First, there are two files and they are opened in the wrong order for most sellers’ habits: the transit declaration on the Indian side needs the commercial documents before the Nepalese declaration does, so the seller’s document deadline is earlier than a coastal shipment teaches. Second, every ambiguity is doubled. A goods description that drifts, a date without a calendar, a unit without a designation or a delivery place without a country is an ambiguity that will be read twice by two administrations. Third, the questions have to be asked of two brokers, one in Nepal about the import and one on the transit side about anything attaching to goods in transit, and this page answers neither. Fourth, the certificate is the one document that has to be right before the cargo leaves, because absolute viscosity cannot be added to a certificate after loading and it is the property the grade is defined by. Petroleum bitumen falls under HS heading 2713.20; the full national subheading and any duty, levy or tax treatment must be confirmed with a licensed customs broker in Nepal, and no rates of any kind are stated here.

Buyer questions

Frequently asked questions about bitumen supply to Nepal

Which port and which border crossing should we use for a project in Kathmandu, Pokhara, Biratnagar or Nepalgunj?

Work backwards from the site, not forwards from the port, because Nepal’s internal geography makes east to west movement slow and north to south movement steep. For Kathmandu and the centre the natural crossing is Birgunj facing Raxaul, which is also the only rail-served point through the Sirsiya inland container depot, with the climb to the valley made either over the Mahabharat by the Tribhuvan Highway through the pass at Daman, commonly cited at around 2,300 m, or by the longer Narayangadh and Mugling route. For Pokhara, Butwal and the western hills it is Bhairahawa facing Sunauli, with the Siddhartha Highway inland. For the eastern Terai and eastern hills it is Biratnagar facing Jogbani. For the mid-west, the far west and the Karnali it is Nepalgunj facing Rupaidiha. For the far eastern corner it is Kakarbhitta facing Panitanki. Only once the crossing is settled does the port question have an answer: Kolkata and Haldia on the Hooghly are the historic gateways for Nepalese third-country trade, with Visakhapatnam an alternative that trades a direct coastal approach against a longer overland leg inside the transit country. Ask your forwarder to price the alternatives to the same named place in Nepal rather than to a port. Nothing on this page states that any port, road, crossing or rail service is currently open or available for this commodity; that is a current-status question and it belongs to a forwarder and a licensed customs broker in writing.

What grade of bitumen does Nepal use?

There is no single national answer, and a supplier who gives you one has not asked where the site is or how high it sits. Nepal runs from a Terai plain that the standard physiographic description places below about 300 m and much of which lies under 150 m, where pre-monsoon maxima commonly reach around 40 °C and the climate is simply the northern Indian plain, through the Middle Hills with the Kathmandu valley at roughly 1,400 m and winter minima commonly around 2 to 5 °C, to high mountain districts with sustained sub-zero winter nights and freeze and thaw at the road surface. In the Terai the pavement temperature case governs and rutting is the failure mode, so the harder end of the range is right and the mainstream answer is VG-30, with VG-40 where the pavement is also heavily loaded. In the hills the sustained temperature case weakens and thermal cycling matters more, so the hardest grades stop being automatic — though heavy, slow, channelised traffic in a warm Kathmandu valley is still a rutting case, so read the traffic as carefully as the altitude. In the wet belt around Pokhara the governing problem is not the binder grade at all but moisture damage, which is answered in the mix with the project aggregate. And in the high mountains the honest answer is that the viscosity grading system has no low-temperature acceptance line, so a grade name cannot evidence performance against the risk that governs there. Establish the town and its altitude, read the tender clause, and quote against the clause rather than against a national habit.

Our tender says VG-30. Can we supply 60/70 instead, or the other way round?

Not silently, and the reason is not a near miss on a number — it is a property that has not been measured. A viscosity grade is defined by absolute viscosity at 60 °C, measured to IS 1206 (Part 2) with ASTM D2171 as the analogous method, close to the temperature at which a hot pavement actually fails. A penetration grade is defined by a closed band at 25 °C measured to IS 1203 or ASTM D5. Penetration at 25 °C does not determine viscosity at 60 °C, because two binders with identical penetration can have materially different temperature susceptibility, which is precisely why the viscosity system was adopted. So a 60/70 certificate carries no evidence of the property VG-30 is defined by. The reverse fails too: the penetration requirement inside VG-30 is a minimum with no upper bound, so a compliant VG-30 batch can measure above 70 dmm or below 60 dmm and still be a correct VG-30 while failing a literal 60/70 clause. The ageing evidence differs as well. IS 73 controls hardening through a viscosity ratio calculated from absolute viscosity before and after the rolling thin film oven test, run to IS 9382 with ASTM D2872 as the analogous method, with a maximum of 4.0; a Middle East export certificate typically carries loss on heating and drop in penetration from a thin film oven test to ASTM D1754 instead, which is a different exposure measuring a different thing. Quote in the words the tender uses, schedule the absolute viscosity tests before the batch is certified, print the method designation beside every result, and get the engineer’s written approval before dispatch for any cross-reference. A cross-reference is a basis for a conversation; it is never a defence at delivery.

Can you quote CIF Kolkata for a project in Kathmandu, and which Incoterm should we actually use?

A CIF Kolkata or CIF Haldia price can certainly be quoted and it is a proper offer, but for a Kathmandu project it prices the sea leg and leaves the transit movement across India, the frontier, the transhipment and the climb into the valley open, so it should be labelled as what it is rather than presented as a delivered price. On the rule itself: under Incoterms 2020, FAS, FOB, CFR and CIF are sea and inland waterway rules built around a vessel and a port. They are coherent at an Indian port and incoherent at a Nepalese inland place, because there is no vessel and no ship’s rail at a land frontier. For a Nepalese delivery use the any-mode rules — FCA, CPT, CIP, DAP or DPU — each naming a precise place. DAP Nepal is not a delivery term. And there is a refinement specific to a landlocked destination that catches people: a term naming Raxaul ends on the Indian side of the frontier and a term naming Birgunj ends on the Nepalese side, and the difference between them is exactly the customs event the buyer most wants covered. Say which country the named place is in, in words. Finally, treat DDP into Nepal as an exception requiring deliberate structuring rather than a convenience: it puts import clearance and charges on a seller who has no presence in Nepal, cannot hold the local registrations and cannot be the importer of record, and on this route it also drags the seller into a transit procedure in a third country.

What does moving in transit through India actually require of us?

It requires you to run two customs files on one consignment, and to run the first one earlier than a coastal shipment teaches. The frame is a stack of instruments: freedom of transit is addressed in Article V of the General Agreement on Tariffs and Trade, there is a United Nations Convention on Transit Trade of Land-locked States concluded in 1965, and Nepal’s third-country trade across India has long been governed by a bilateral treaty of transit with subordinate protocols setting out routes, nominated points and procedures. This page describes that as a mechanism and states nothing about its current terms. Structurally, what a transit regime asks is consistent: the goods are landed but not imported into the transit country, they move under a declaration specific to transit — for Nepal-bound traffic conventionally a customs transit declaration — the movement is secured by a bond, bank guarantee or equivalent standing in for the suspended duties, the route and the exit station are nominated rather than chosen en route, the goods cannot be split, decanted or partly discharged along the way, and the security is discharged when the goods are accounted for at the nominated station. The import itself happens in Nepal, against a Nepalese declaration lodged by a Nepalese importer holding the registrations Nepalese law requires. Get the current position in writing and dated from a licensed customs broker in Nepal, ask who provides the transit security and what it costs, and ask again if the shipment slips.

Does bitumen need a conformity certificate for Nepal, and does anything Indian apply because the cargo crosses India?

The mechanisms can be described; the current positions cannot be, and this page deliberately does not state them. Nepal’s national standards body is the Nepal Bureau of Standards and Metrology, which develops Nepal Standards, operates a national certification mark scheme and carries responsibilities in relation to conformity assessment for goods placed on the market. Schemes of that family work by scope: they apply to a defined product list expressed by category and tariff classification, the obligation may attach to the manufacturer, the importer or both, the evidence is a test report against a named standard, marking requirements have to be settled before packing rather than after, and the consequence of getting it wrong is detention, testing at the importer’s cost, penalties or refusal of entry. Whether bitumen is currently within any such scope, and which body is appointed to do what, is not stated here because product lists, tariff lines and appointed agents change and an undated assertion is precise enough for a buyer to plan on and wrong often enough to ruin a shipment. The second half of the question is the one almost nobody asks, and it exists only because the destination is landlocked. The goods cross India, and India has its own standards and quality-control machinery administered around the Bureau of Indian Standards. Goods moving under a transit procedure are by definition not entered for home consumption in the transit country, but whether that means nothing attaches to them, and whether any documentary, marking or handling requirement applies to goods in transit as distinct from goods imported, is a question for a licensed customs broker rather than for this page. Ask it explicitly, of a broker on each side, in writing and dated.

Drums or bulk for a Nepalese delivery, and what packing survives a hill road?

Drums, in almost every Nepalese case, and the reasons are cumulative rather than a matter of preference. Heated bulk is only useful if the receiver has heated tankage of adequate capacity, a compatible discharge connection, a pump and the ability to take the whole load promptly, and a contractor running a plant on a hill road above Butwal or beyond Surkhet has none of it. A tanker holds temperature badly across a long leg with a customs frontier on it, and reheating a stiffened load is an operational problem with a cost and a risk attached. Bulk sits badly with a transit procedure, because a sealed movement running to a nominated station is not one in which product can be split between receivers or partly discharged. And there is a point specific to Nepal that does not arise on a plains corridor: the hill road sets the vehicle, drums can be transferred to whatever the last climb accepts as many times as the road requires, and a bulk load is one indivisible unit that either fits the whole route or does not. A damaged drum also costs one drum out of eighty, whereas a compromised bulk load costs the consignment at the end of a foreign transit leg with no reverse gear. On arithmetic, the site standard loading figures are 150 kg drums giving 80 drums and 12 MT per 20 ft FCL, 180 kg giving 14.4 MT, 185 kg giving 14.8 MT, and 1 MT jumbo bags giving 20 bags and 20 MT. Jumbo bags are efficient on freight and fit this market least well where the freight saving would matter most, because they need mechanical handling at every point and have to be melted as a unit rather than drawn down. Specify new steel drums in the contract, in words: a cargo that changes hands at a port, a transit vehicle, a frontier, a stripping yard and a hill transfer gives a contamination argument five places to start.

When is the Nepalese construction season, and how should that change when we order?

Shorter than the calendar suggests, and shorter again in the hills. The south-west monsoon conventionally arrives in the east around the second week of June and withdraws around late September or early October, later in the east than in the far west, and commonly around eighty per cent of the year’s precipitation falls inside that window. Asphalt work is effectively suspended across most of the country for the duration, so the working year runs roughly October to May in the Terai and is cut further at the cold end in the hills and mountains, where winter closes the higher work out. Three consequences. Demand concentrates into the same months for everybody, so plant, haulage and material are under simultaneous pressure. Material for hill and mountain projects has to be pre-positioned while the road allows and drawn down through the season rather than called off, which makes drum integrity, covered storage and the ability to heat one unit at a time worth more than a packaging saving. And a consignment that misses a window waits for the next one rather than arriving late, so where it waits and at whose cost belongs in the contract. Two further timing points that are specific to this market. The saturated months are also when slope failure risk on hill alignments is highest, which is a description of the terrain and the season and not a claim about the state of any road; plan hill deliveries outside them and take current routing advice from a forwarder in writing. And Nepal’s fiscal year runs mid-July to mid-July on the Bikram Sambat calendar, so the fiscal year end falls at the close of Ashadh, in mid-July, a month into the monsoon — which concentrates spending and completion pressure into the worst weeks of the year. Plan deliveries to land well before it, and state which calendar governs any date in a contract or a credit.

QC
How this page is maintainedThe geography on this page — ports, border crossings and their counterparts on each side, inland clearance depots, towns, altitudes, highways, railway connection and climate zones — is public and is described because it is stable and verifiable. Road distances, where mentioned at all, are commonly cited approximations given for orientation only, they vary with the alignment actually used, and they are not a basis for a freight calculation. The operating status of any port, berth, terminal, road, border post, rail link, inland container depot or transit service is not stated anywhere, because it changes constantly and cannot be verified from a supplier page; confirm current routing, mode, nominated points, permitted vehicle weights and documentation with a freight forwarder and a licensed customs broker in writing before contracting. No transit times, freight rates, vehicle payloads, vessel or tanker capacities, port throughput or draught figures, container free time periods, detention charges, duty rates, taxes, levies, exchange rates or currency parities are given. Transit arrangements between states are described as mechanisms only: this page states nothing about the current terms, renewal position, nominated routes or commodity treatment under any treaty, protocol or bilateral arrangement, and nothing about the current availability of any northern or third-country routing. No haulier, forwarder, terminal operator, clearing agent, inspection body, railway operator, refinery, product brand or client is named as a counterparty; where a port, facility, authority, ministry, department or standards body is named it is named as public geography or as a public body, and no commercial relationship with any of them is claimed or implied. This company makes no claim of presence, office, agency or shipping history in Nepal, India, Bangladesh or China. Conformity, certification and quality-control schemes are described as mechanisms only: this page states no position on whether any product is currently within the scope of any Nepalese scheme, or of any Indian scheme as it may or may not relate to goods moving in transit, and it names no currently appointed inspection body, because scopes, product lists, tariff lines and appointed agents change and must be confirmed with a licensed customs broker in the destination for the specific product and shipment date. No Nepalese national standard designation for paving bitumen is quoted, because procurement runs through a central roads department, a local infrastructure body, provincial and local governments and donor-financed projects whose documents are not uniform; the binding requirement is the one the tender incorporates. Specification values are stated with the Indian Standard test method and its ASTM analogue that produce them, and are provided for technical orientation and commercial discussion; IS 73 has been revised and the grading basis itself changed at one of those revisions, so where a tender cites a standard the acceptance limits are those in the edition cited, and the binding specification for any shipment is the one written into the sales contract and evidenced by the batch Certificate of Analysis. Statements about the monsoon, the season and slope failure risk are climatic and geological descriptions, not claims about the condition, availability or safety of any route on any date. Nothing on this page is legal, customs, regulatory, insurance or compliance advice, and it takes no position on licensing or trade-restriction questions for any country: a buyer moving goods across these frontiers must obtain independent advice covering the goods, the parties, every customs territory on the route and the payment mechanism. If you find a value here that conflicts with a current standard, tell us and we will correct it.

Request a quotation for delivery to Nepal

Send the grade exactly as your tender names it, the tonnage and the packing — and before anything else, three things that decide the whole structure of the offer: the actual delivery town rather than the country, roughly how high it sits, and which border crossing you intend to use. Those three answers settle the port, the transit arrangement, the packing, the delivery term and the binder argument, in that order. State the Incoterms 2020 rule you want quoted, the named place it applies to, and which side of the frontier that place is on. If you hold the tender’s binder clause, attach it, and the offer will be checked against it line by line — including whether it is written in the viscosity system or the penetration system, which edition of the standard it cites, whether absolute viscosity at 60 °C and the rolling thin film oven viscosity ratio have to appear on the certificate, and whether a high-altitude site needs a low-temperature property that no viscosity grade carries. Contact is by WhatsApp on +971 56 144 5733.

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