HS code · 6-digit subheading
HS Code 8404.10 – Boilers; auxiliary plant, for use with boilers of heading no. 8402 or 8403 (e.g. economisers, super-heaters, soot removers, gas recoverers)
HS code 8404.10 is the 6-digit subheading for boilers, auxiliary plant, for use with boilers of heading no. 8402 or 8403 (e.g. economisers, super-heaters, soot removers, gas recoverers). It is used for economizers, superheaters, soot blowers, air preheaters and desuperheaters.
What HS 8404.10 covers
This HS code encompasses the crucial auxiliary equipment designed to enhance the efficiency and performance of industrial boilers (classified under 8402 or 8403). These components are vital for optimizing heat recovery, reducing emissions, and ensuring the longevity of boiler systems in power plants, chemical facilities, and heavy industries. International trade in these specialized items is driven by the global demand for energy efficiency and environmental compliance. Major importers are countries with significant industrial bases and ongoing infrastructure projects, while exporters are typically advanced manufacturing nations with expertise in heavy machinery. Key things to know include the high engineering precision required and the custom nature of many installations, making them high-value trade items.
- Covers
- Economizers
- Superheaters
- Soot blowers
- Air preheaters
- Desuperheaters
- Heat exchangers (boiler auxiliary type)
- Flue gas desulfurization units
- Examples
- GE Power economizers
- Siemens Energy superheaters
- Clyde Bergemann soot blowers
- Babcock & Wilcox air preheaters
Codes often confused with 8404.10
Common mistake. This code can be confused with complete boilers (8402, 8403) or general parts of machinery (8479) if their specific function as boiler auxiliaries is not clearly identified. Ensure the item's primary purpose is to assist a boiler of heading 8402 or 8403.
Top exporters and importers of HS code 840410, 2025
In 2025, the largest exporter of HS code 840410 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.
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 8404.10 2
Brazil splits HS 8404.10 into 2 NCM codes, Mercosur's 8-digit tariff lines.
- 8404.10.10 Auxiliary plant, steam/super-heated water boilersDa posição 84.02
- 8404.10.20 Auxiliary plant for central heating boilersDa posição 84.03
All Brazil NCM codes in heading 84.04 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 8404.10
What is HS code 840410?
HS code 840410 is a 6-digit subheading in the Harmonized System that covers: Boilers; auxiliary plant, for use with boilers of heading no. 8402 or 8403 (e.g. economisers, super-heaters, soot removers, gas recoverers). This HS code encompasses the crucial auxiliary equipment designed to enhance the efficiency and performance of industrial boilers (classified under 8402 or 8403). These components are vital for optimizing heat recovery, reducing emissions, and ensuring the longevity of boiler systems in power plants, chemical facilities, and heavy industries. International trade in these specialized items is driven by the global demand for energy efficiency and environmental compliance. Major importers are countries with significant industrial bases and ongoing infrastructure projects, while exporters are typically advanced manufacturing nations with expertise in heavy machinery. Key things to know include the high engineering precision required and the custom nature of many installations, making them high-value trade items.
What products fall under HS code 840410?
Economizers, superheaters, soot blowers, air preheaters, desuperheaters, heat exchangers (boiler auxiliary type), flue gas desulfurization units
What are common misclassifications for HS code 840410?
This code can be confused with complete boilers (8402, 8403) or general parts of machinery (8479) if their specific function as boiler auxiliaries is not clearly identified. Ensure the item's primary purpose is to assist a boiler of heading 8402 or 8403.
Which countries are the top exporters of goods under HS code 840410?
In 2025, the top exporters of HS code 840410 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 goods under HS code 840410?
In 2025, the top importers of HS code 840410 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.
How is HS code 840410 structured?
HS code 840410 is a 6-digit subheading under the Harmonized System. The first 2 digits (84) identify the chapter, digits 3-4 (04) identify the heading, and digits 5-6 (10) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 840410?
Brazil splits HS code 840410 into 2 NCM codes: 8404.10.10 (Auxiliary plant, steam/super-heated water boilers), 8404.10.20 (Auxiliary plant for central heating boilers). The first 6 digits of each match the HS code.