Product classification
HS code for Soot removers: 8404.10
Boilers, auxiliary plant, for use with boilers of heading no. 8402 or 8403 (e.g. economisers, super-heaters, soot removers, gas recoverers).
Classification of soot removers under HS 8404.10
Soot removers are classified under HS code 8404.10. This classification is part of Chapter 84, which deals with nuclear reactors, boilers, machinery, and mechanical appliances. Heading 8404 is specifically designated for auxiliary plant for use with boilers of heading 8402 or 8403. This includes equipment like economizers, super-heaters, and gas recoverers. Soot removers in this context refer to mechanical devices designed to remove soot and ash deposits from the heat-transfer surfaces of boilers to maintain efficiency. These are typically automated or manual blowers that use steam, air, or water jets to clean the tubes. It is important to distinguish these mechanical systems from chemical cleaning agents. The HS code 8404.10 is strictly for mechanical auxiliary plants that form part of a boiler installation. These devices are essential for preventing the buildup of combustion byproducts that would otherwise insulate the boiler tubes and reduce thermal conductivity.
- Covers
- Mechanical soot blowers
- Steam-jet soot removers
- Air-jet soot removal systems
- Automated boiler cleaning plants
- Soot removal auxiliary equipment for central heating boilers
- Also under 8404.10
- GE Power economizers
- Siemens Energy superheaters
- Clyde Bergemann soot blowers
- Babcock & Wilcox air preheaters
Codes often confused with 8404.10
Common mistake. The most common misclassification involves chemical soot removers, which are often classified under HS code 3811 (anti-knock preparations and fuel additives) or HS code 3824 (prepared chemical products). HS code 8404.10 only applies to mechanical apparatus. Another error is classifying these parts under 8402.90 (parts of steam boilers). While they are used with boilers, heading 8404 is a specific heading for auxiliary plants, and according to the Section XVI notes, specific headings for machinery take precedence over general parts headings.
Top exporters and importers of HS 840410 (the code used for soot removers), 2025
In 2025, the largest exporter of HS 840410 (the code used for soot removers) in UN Comtrade data was China, with 36% of world exports; the largest importer in UN Comtrade data was the United States, with 9.9% 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 840410, not only soot removers.
Top exporters 2025 · share of world exports
- 1 China $194M 36% of world exports
- 2 Italy $47M 8.7% of world exports
- 3 Germany $45M 8.3% of world exports
World total: $540M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $49M 9.9% of world imports
- 2 France $33M 6.7% of world imports
- 3 United Kingdom $29M 5.9% of world imports
World total: $495M 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 codes for soot removers
Brazil splits HS 8404.10 into 2 NCM codes. Pick the one that matches your product:
- 8404.10.10Auxiliary plant, steam/super-heated water boilers
- 8404.10.20Auxiliary plant for central heating boilers
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about soot removers
What is the HS code for Soot removers?
The HS code for Soot removers is 840410 (Boilers; auxiliary plant, for use with boilers of heading no. 8402 or 8403 (e.g. economisers, super-heaters, soot removers, gas recoverers)).
How do I classify Soot removers for customs?
Soot removers is classified under HS code 840410 — Boilers; auxiliary plant, for use with boilers of heading no. 8402 or 8403 (e.g. economisers, super-heaters, soot removers, gas recoverers). This is a 6-digit subheading level code.
What is the HS code for mechanical soot removers?
The HS code for mechanical soot removers used as auxiliary plant for boilers is 8404.10.
One more relevant question
Are chemical soot removal powders included in this code? No, chemical powders or liquids are classified in Chapter 38 based on their chemical composition.
Which countries are the top exporters of soot removers (HS 840410)?
In 2025, the top exporters of HS 840410 (the code used for soot removers) in UN Comtrade data were China ($194M, 36% of world exports), Italy ($47M) and Germany ($45M). World exports came to about $540M, 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 soot removers (HS 840410)?
In 2025, the top importers of HS 840410 (the code used for soot removers) in UN Comtrade data were the United States ($49M, 9.9% of world imports), France ($33M) and the United Kingdom ($29M). World imports came to about $495M, 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 Soot removers the same in all countries?
The base HS code 840410 for Soot removers 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 soot removers in Brazil?
Brazil splits HS 840410 into 2 NCM codes, so the right one for soot removers depends on the product's details: 8404.10.10 (Auxiliary plant, steam/super-heated water boilers), 8404.10.20 (Auxiliary plant for central heating boilers).