Product classification
HS code for Producer gas generators: 8405.10
Generators, producer gas, water gas, acetylene gas and similar water process gas generators, with or without their purifiers.
Classification of producer gas generators under HS 8405.10
Producer gas generators are classified under HS code 8405.10 because they are primary mechanical units designed to generate gas through thermal or chemical processes. This heading specifically covers apparatus that produces gas mixtures such as producer gas, water gas, or acetylene gas from solid fuels like coal, coke, or charcoal, or through water-based reactions. The classification is determined by the functional nature of the equipment, which transforms raw materials into combustible or industrial gases. These units often include integrated purifiers to remove impurities like tar, dust, or sulfur; the presence of these purifiers does not change the classification under 8405.10, as they are considered auxiliary components to the main generator. The machinery must be intended for gas production rather than simply being a heat exchange unit or a storage vessel.
- Covers
- Producer gas generators
- Water gas generators
- Acetylene gas generators (water process)
- Integrated gas purifiers for 8405 generators
- Coke-based gas producers
- Also under 8405.10
- Messer Group acetylene generators
- Air Products syngas generators
- Linde gasification plants
- Praxair industrial gas generators
Codes often confused with 8405.10
Common mistake. These generators are frequently confused with gas turbines classified under 8411 or heat exchange units under 8419. While a gas turbine uses gas to produce power, the 8405.10 code is strictly for the equipment that creates the gas itself. Additionally, ozone generating specialized medical or laboratory apparatus may be misclassified here but belongs under 8543.
Top exporters and importers of HS 840510 (the code used for producer gas generators), 2025
In 2025, the largest exporter of HS 840510 (the code used for producer gas generators) in UN Comtrade data was China, with 12% of world exports; the largest importer in UN Comtrade data was South Korea, with 12% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 840510, not only producer gas generators.
Top exporters 2025 · share of world exports
- 1 China $79M 12% of world exports
- 2 Belgium $73M 11% of world exports
- 3 Italy $53M 8.4% of world exports
World total: $637M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 South Korea $83M 12% of world imports
- 2 Belgium $53M 7.3% of world imports
- 3 Ireland $41M 5.7% of world imports
World total: $720M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for producer gas generators
Brazil classifies producer gas generators under NCM 8405.10.00: HS 8405.10 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about producer gas generators
What is the HS code for Producer gas generators?
The HS code for Producer gas generators is 840510 (Generators; producer gas, water gas, acetylene gas and similar water process gas generators, with or without their purifiers). The HS code for producer gas generators, including water gas and acetylene gas generators, is 8405.10.
How do I classify Producer gas generators for customs?
Producer gas generators is classified under HS code 840510 — Generators; producer gas, water gas, acetylene gas and similar water process gas generators, with or without their purifiers. This is a 6-digit subheading level code.
Does this code include the gas purification units?
Yes, if the purifiers are presented with the generators and form an integral part of the gas production system, they are included under 8405.10.
Which countries are the top exporters of producer gas generators (HS 840510)?
In 2025, the top exporters of HS 840510 (the code used for producer gas generators) in UN Comtrade data were China ($79M, 12% of world exports), Belgium ($73M) and Italy ($53M). World exports came to about $637M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of producer gas generators (HS 840510)?
In 2025, the top importers of HS 840510 (the code used for producer gas generators) in UN Comtrade data were South Korea ($83M, 12% of world imports), Belgium ($53M) and Ireland ($41M). World imports came to about $720M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Producer gas generators the same in all countries?
The base HS code 840510 for Producer gas generators is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for producer gas generators in Brazil?
In Brazil, producer gas generators (HS 840510) is classified under NCM 8405.10.00.