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HS code 8404: Auxiliary plant for use with boilers of heading no. 8402 or 8403…

Auxiliary plant for use with boilers of heading no. 8402 or 8403; e.g. economisers, super-heaters, soot removers, gas recoverers), condensers for steam or other vapour power units — heading 8404 of the Harmonized System (HS 2022).

SectionXVI
Chapter84
Subheadings (6 digits)3

Chapter 84: Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof

Subheadings of 8404 (6 digits)

Pick the subheading that describes your product. A subheading marked “n.e.c.” (not elsewhere classified) or “other” covers only what the subheadings before it do not. Click a code to copy it.

Confirm the full code and the duty rate

The first 6 digits are the same in every country that uses HS 2022. Each country adds 2–4 more digits and sets the duty in its own tariff, and the section and chapter notes can include or exclude products, so check the destination’s official tariff before you put the code on the invoice.

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Other headings in chapter 84

← 8403Chapter 848405 →

Source: HS 2022 nomenclature, 6-digit level (UN Comtrade). Descriptions are in English, as in the official nomenclature. Digits after the 6th differ by country.

Guides on this topic

Common questions

What is HS code 8404?

8404 is the HS 2022 heading for Auxiliary plant for use with boilers of heading no. 8402 or 8403; e.g. economisers, super-heaters, soot removers, gas recoverers), condensers for steam or other vapour power units. It is in chapter 84 (Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof), section XVI, and has 3 six-digit subheadings, from 8404.10 to 8404.90.

Can I write 8404 on a commercial invoice?

Customs usually need at least the 6-digit subheading (for example 8404.10), and the import declaration uses the destination country’s full code of 8 to 10 digits. Use the subheading that matches your product, and confirm the national digits with the buyer, the customs broker or the official tariff.

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