Product classification
HS code for Small steam turbines: 8406.82
Turbines, steam and other vapour turbines, (for other than marine propulsion), of an output not exceeding 40MW.
Classification of small steam turbines under HS 8406.82
Small steam turbines are classified under HS code 8406.82 based on the General Rules for the Interpretation of the Harmonized System (GRI). Chapter 84 encompasses nuclear reactors, boilers, machinery, and mechanical appliances. Within this chapter, heading 8406 is specifically dedicated to steam turbines and other vapor turbines. The classification process involves evaluating the primary function of the machinery and its technical specifications. Subheading 8406.82 is reserved for turbines that are not intended for marine propulsion and have a rated power output not exceeding 40 megawatts (MW). These turbines operate by converting the thermal energy of pressurized steam into mechanical work through a rotating output shaft. The distinction between 8406.82 and other subheadings is primarily based on the power capacity and the intended environment of use. If the turbine exceeds 40MW, it moves to 8406.81. If it is designed for marine use, it falls under 8406.10. Accurate classification requires a review of the manufacturer's technical data sheet to confirm the maximum continuous rating (MCR) and the intended application of the unit.
- Covers
- Industrial back-pressure steam turbines under 40MW
- Condensing steam turbines for small-scale power generation
- Extraction steam turbines used in combined heat and power (CHP) plants
- Auxiliary steam turbines for driving pumps or compressors
- Vapor turbines for organic Rankine cycle (ORC) systems
- Also under 8406.82
- Siemens Energy SST-100 turbine
- GE Power small industrial steam turbines
- MAN Energy Solutions steam turbines
- Fuji Electric steam turbines
Codes often confused with 8406.82
Common mistake. Small steam turbines are frequently confused with marine propulsion turbines classified under HS code 8406.10. While the mechanical principles are similar, the 8406.10 code is strictly for engines used to move vessels. Another common error is misclassifying units under 8406.81, which is reserved for larger turbines with an output exceeding 40MW. Importers must ensure the power rating is clearly documented to avoid these errors. Additionally, gas turbines are classified under 8411, and hydraulic turbines fall under 8410, both of which are distinct from steam-driven units.
Top exporters and importers of HS 840682 (the code used for small steam turbines), 2025
In 2025, the largest exporter of HS 840682 (the code used for small steam turbines) in UN Comtrade data was Japan, with 20% of world exports; the largest importer in UN Comtrade data was China, with 11% 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 840682, not only small steam turbines.
Top exporters 2025 · share of world exports
- 1 Japan $89M 20% of world exports
- 2 China $81M 18% of world exports
- 3 India $52M 12% of world exports
World total: $446M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $46M 11% of world imports
- 2 United States $32M 7.8% of world imports
- 3 Kenya $28M 6.7% of world imports
World total: $417M 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 small steam turbines
Brazil classifies small steam turbines under NCM 8406.82.00: HS 8406.82 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about small steam turbines
What is the HS code for Small steam turbines?
The HS code for Small steam turbines is 840682 (Turbines; steam and other vapour turbines, (for other than marine propulsion), of an output not exceeding 40MW). The HS code for small steam turbines with an output not exceeding 40MW, and not used for marine propulsion, is 8406.82.
How do I classify Small steam turbines for customs?
Small steam turbines is classified under HS code 840682 — Turbines; steam and other vapour turbines, (for other than marine propulsion), of an output not exceeding 40MW. This is a 6-digit subheading level code.
How is the 40MW limit measured for classification?
The 40MW limit refers to the maximum continuous rated power output of the turbine as specified by the manufacturer in the technical documentation.
Which countries are the top exporters of small steam turbines (HS 840682)?
In 2025, the top exporters of HS 840682 (the code used for small steam turbines) in UN Comtrade data were Japan ($89M, 20% of world exports), China ($81M) and India ($52M). World exports came to about $446M, 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 small steam turbines (HS 840682)?
In 2025, the top importers of HS 840682 (the code used for small steam turbines) in UN Comtrade data were China ($46M, 11% of world imports), the United States ($32M) and Kenya ($28M). World imports came to about $417M, 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 Small steam turbines the same in all countries?
The base HS code 840682 for Small steam turbines 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 small steam turbines in Brazil?
In Brazil, small steam turbines (HS 840682) is classified under NCM 8406.82.00.