Importing Air Separation Units to Nigeria (2026)

A cryogenic air separation unit turns ambient air into the oxygen, nitrogen, and argon that Nigeria’s ammonia plants, refineries, and merchant-gas players run on. If you are a Nigerian buyer scoping one, or a foreign supplier sizing the opportunity, the hard part is rarely the cold box. It is FX, the letter of credit, customs classification, and getting an oversized cryogenic package off a vessel and onto a foundation. This guide covers all four.

Who actually buys an ASU in Nigeria

The buyer set is narrow and high-value: the search for industrial gas separation unit suppliers in Nigeria comes from a handful of named accounts. Three demand pools account for almost every cryogenic ASU enquiry.

Ammonia and fertiliser plants. Every nitrogen complex needs large-volume nitrogen for inerting, blanketing, and instrument air. Indorama Eleme in Rivers State is the clearest example. Its third urea line, built by Daewoo E&C Nigeria, carries a 2,300 metric-tonnes-per-day ammonia unit and a 4,000 MTPD urea facility, and the published scope explicitly lists nitrogen, plant air, and instrument air among the associated utilities, per the Daewoo E&C Nigeria project page. Multiply that across Indorama’s two existing trains, the Dangote fertiliser expansion, and Notore at Onne, and the nitrogen demand is large and recurring.

Refineries and petrochemicals. The Dangote complex in the Lekki Free Trade Zone is the anchor. Air Liquide Engineering & Construction already supplied the refinery’s hydrogen backbone, two steam methane reformer units producing 200,000 Nm3/h of hydrogen, per Air Liquide’s own announcement. Refineries moving into gasification or higher-purity nitrogen blanketing pull cryogenic oxygen (typically 99.5% purity and up) and high-purity nitrogen at the tonnage scale an ASU delivers.

Merchant industrial-gas operators. Air Liquide has run gas operations in Nigeria since 1960 and still operates sites at Port Harcourt and Lagos, and Industrial and Medical Gases Nigeria Plc (the former BOC Gases Nigeria) produces oxygen, nitrogen, argon, and carbon dioxide. These players are the most likely buyers of a stand-alone merchant ASU, sized to fill cylinders and feed liquid into trucks across the Lagos, Port Harcourt, and Abuja corridors.

If your equipment makes oxygen, nitrogen, or argon at industrial volume, the addressable buyer list in Nigeria is short enough to name. That is unusual, and it rewards focused outreach over broad advertising.

The market backdrop, so you size it right

The global air separation unit market sits at roughly $5.93 billion in 2025, heading toward $8.08 billion by 2031 at a 5.36% CAGR, according to Mordor Intelligence. Cryogenic distillation holds about 73.5% of that value, since it is still the only route to high tonnage and liquid product, and the same analysis flags Middle East and Africa as the fastest-growing region at 6.6% CAGR. Nigeria is a meaningful slice, given the refinery, fertiliser, and steel build-out. For the wider sector this demand sits inside, see our Nigeria fertiliser and petrochemicals procurement guide, which maps the buyers and the EPC stack train by train.

FX access and getting the deal paid

This is where most first-time imports stall. Nigeria unified its foreign-exchange windows in 2023 and moved to a willing-buyer/willing-seller market, easing hard-currency access for legitimate capital imports. An ASU is a large, lumpy purchase, often quoted in USD or EUR, so the buyer’s FX position matters as much as the price.

Letters of credit are the default. For a capital-goods import of this size, the standard structure is an irrevocable letter of credit. Tier 1 Nigerian banks (Zenith, GTBank, Access, First Bank, UBA, Stanbic IBTC) open USD- and EUR-denominated LCs for industrial imports routinely. A first-time foreign supplier should ask for a confirmed irrevocable LC, with the confirming bank in London, Frankfurt, or Dubai, so the supplier carries the confirming bank’s risk rather than direct Nigerian bank risk. Build the confirmation cost into the line items rather than absorbing it.

Project finance for the big packages. A full cryogenic train tied to a new ammonia or refinery line is usually financed, running on milestone payments through the project facility with development-finance institutions and export credit agencies in the stack. A supplier that arrives with indicative export-credit cover from its home agency (Euler Hermes, SACE, UKEF, US EXIM, Sinosure) is more financeable than one offering a bare price.

Quote and structure cleanly. Price in hard currency with a naira-equivalent reference for tax. Separate the equipment, freight, installation supervision, and certification line items so the procurement team can challenge each one, and state payment terms (sight LC versus 30 to 90 days) up front.

Customs, HS classification, and duty

This is the part suppliers underestimate, and where a clean classification saves money.

HS classification. A cryogenic air separation unit and its components fall under Chapter 84 of the Harmonized System, with gas-separation plant typically under heading 8419. The Nigeria Customs Service follows the WCO six-digit HS code and adds two national digits. Getting the classification right at the pro-forma stage avoids reclassification disputes and penalties at the port.

Duty under the ECOWAS CET. Nigeria migrated to the current ECOWAS Common External Tariff schedule in 2022, as documented by the US International Trade Administration. The CET runs five bands from 0% (capital goods and machinery not produced locally) up to 35% for designated categories. An ASU with no local equivalent generally lands in the 0% capital-goods band. That is a genuine advantage, but it hinges on classification and on there being no protected local product, so confirm the line with a Nigerian customs broker before you commit pricing.

VAT and levies. Value added tax of 7.5% applies to imports, administered by the Nigeria Revenue Service (the former FIRS), with feed gas and certain oil-and-gas inputs among the exemptions under the tax reforms that took effect on 1 January 2026, per Businessday. On top of duty and VAT, budget for the standard surcharges and the ECOWAS levy, plus a SONCAP conformity assessment for any electrical and instrumentation scope. SONCAP runs on a country-of-export inspection cycle, so start it early.

Port logistics for an oversized cryogenic package

A cold box, a main air compressor, and the associated columns are heavy, tall, and intolerant of rough handling. Port choice is an engineering decision, not an afterthought.

Onne (Oil and Gas Free Zone). For a buyer in Rivers State (Indorama, Notore, the Niger Delta belt), Onne is usually the right gateway. One of the largest oil-and-gas free zones in the world, the Nigerian Ports Authority’s Onne complex is built for break-bulk, project, and heavy-lift cargo, with mobile harbour cranes rated well into the hundreds of tonnes, and it avoids the long road haul of an outsized load up from Lagos.

Lekki Deep Sea Port. For the Dangote complex and the western corridor, Lekki is the modern option. It became Nigeria’s leading port by throughput in 2025, handling 40.6% of national cargo on a 16-metre draft, per Nairametrics. The deep draft and newer infrastructure suit large project vessels, though its general-cargo handling is still maturing relative to Onne’s purpose-built setup, so vet the lift and laydown plan with the terminal.

Apapa and Tin Can Island. Lagos’s older ports remain the default for general industrial cargo, but congestion and the urban road network make them the harder choice for a single oversized cryogenic package. Many project teams route the heavy lifts through Onne or Lekki and keep Apapa for smaller crated components. Whichever gateway you choose, plan the route survey, foundation readiness, and crane spread before the vessel sails: a cold box that arrives before its plinth is poured sits exposed, and demurrage on a project vessel is expensive.

Conventional sourcing channels losing ground

The old way a Nigerian buyer and a foreign ASU supplier found each other is getting more expensive and less reliable.

Sector trade fairs. Nigeria Oil & Gas in Abuja and the regional gas expos still gather adjacent audiences, but a booth loaded with freight, hospitality, and senior-engineer time runs $20,000 to $80,000, and the qualified-buyer density for something as specific as a cryogenic ASU is thin. Per-qualified-lead cost from fairs realistically lands at $300 to $900 or more, and every show costs roughly the same as the last.

Field sales representatives. A senior expat process-equipment rep in Lagos, fully loaded with housing, schooling, security, and rotation flights, runs $300,000 to $500,000 a year and can cover one or two accounts. A Nigerian senior sales engineer with cryogenic depth runs $80,000 to $150,000 fully loaded. Either way the per-qualified-lead cost lands in the $500 to $1,200-plus range, and one rep cannot keep Indorama in Port Harcourt, Dangote in Lekki, and the Lagos merchant-gas operators warm at once.

Distributor and trading-house lock-in. General trading houses in Apapa and Onne move spares well, but they cannot represent your engineering at the licensor and EPC vendor-qualification stage where an ASU is specified, and the large buyers increasingly prefer direct OEM relationships with a named local after-sales presence. Bilateral trade missions and print advertising round out the old playbook, but they build brand presence, not pipeline.

None of these channels gives a foreign supplier parallel coverage of every relevant Nigerian buyer and EPC at the same time, which is the actual gap.

How papaverAI fits, and how to send your spec

The structural problem in selling an ASU into Nigeria is that the buyer list is short, senior, and spread across Lagos, Port Harcourt, and the EPC vendor-qualification desks. papaverAI builds the outbound engine that keeps a supplier in front of all of them in parallel, in English, grounded in real Nigerian context: who is expanding, which EPC holds the spec, what the FX and customs path looks like. The cost per qualified lead lands at $150 to $300, against $300 to $900-plus from a trade fair and $500 to $1,200-plus from a field rep. The difference is the curve: fairs and reps scale linearly, where each new account costs about as much as the first, while the engine’s marginal cost on the next hundred contacts is close to zero. It gets cheaper the longer it runs.

If you are scoping an ASU import, the fastest way to a real answer is to send your specification through our contact page: the capacity (Nm3/h of O2 and N2), purity grades, gaseous or liquid product split, and your delivery Incoterm, and we will route it to the right supplier path. For direct procurement enquiries, reach burak@papaverai.com. To see how the engine maps a buyer set before outreach goes out, read how it works.

FAQ

Who supplies air separation units into Nigeria? Demand is anchored by Indorama Eleme and the Dangote complex on the process side, and by merchant operators such as Air Liquide and Industrial and Medical Gases Nigeria Plc on the cylinder-and-liquid side. The global cryogenic ASU technology houses sell into all three through EPC vendor qualification, not over the counter.

What duty applies when importing an ASU to Nigeria? Under the ECOWAS Common External Tariff, capital goods and machinery with no local equivalent generally sit in the 0% duty band, though 7.5% VAT still applies on import. Classification under Chapter 84 (typically heading 8419) decides the outcome, so confirm the HS line with a Nigerian customs broker before pricing.

Which port should a cryogenic package come through? For Rivers State buyers, Onne’s oil-and-gas free zone is purpose-built for break-bulk and heavy-lift project cargo and avoids the long road haul from Lagos. For the Dangote and western corridor, Lekki Deep Sea Port offers a 16-metre draft and modern infrastructure. Vet the lift and laydown plan with the terminal before the vessel sails.

How is a large ASU paid for in Nigeria? A confirmed irrevocable letter of credit from a Tier 1 Nigerian bank, with confirmation in London, Frankfurt, or Dubai, is the conservative pattern for a first-time supplier. Full cryogenic trains tied to new ammonia or refinery lines are usually project-financed on milestones, often with home-country export-credit cover in the stack. RFQ-to-order runs three to nine months for a stand-alone merchant unit, and multi-year for a train tied to a new line and its financial close.

Where to go next

This is the equipment-level guide. For the sector map of fertiliser and petrochemical buyers and the EPC stack you qualify through, read our Nigeria fertiliser and petrochemicals procurement guide. For the national picture, FX reforms, local-content rules, and the full project pipeline, see the Nigeria industrial and procurement landscape.