Chapter 84 · Machinery and mechanical appliances; computers · Section 16

HS Code 8404.00

8404 Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economisers, superheaters, soot removers, gas recoverers); condensers for steam or other vapour power units

Heading 8404: Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economizers, super-heaters, soot removers, gas recoverers); condensers for steam or other vapor power units; parts thereof

US duty (general)

see lines

US HTS lines

EU CN codes

UK commodity codes

Unit

US HTS + UK Tariff v4.0.1633 · updated 2026-10-21 · sources

Rates on this page are the official published schedule rates, shown for information. This is not a customs ruling: preference programs, Section 232/301 surcharges and per-shipment fees can change what you actually pay.

United States - HTS lines under 8404.00

Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.

No US tariff lines under this subheading in the current schedule.

European Union - CN codes under 8404.00

Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.

CN code	Description
8404 00 00	8404 Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economisers, superheaters, soot removers, gas recoverers); condensers for steam or other vapour power units	EU duty (TARIC) →

United Kingdom - commodity codes under 8404.00

Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.

No UK declarable lines under this subheading in the current tariff.

Not a customs ruling. Classification is determined by the importing country's customs authority and depends on the exact product. This page is reference information from official published schedules, not legal advice. For a binding decision, request a ruling (US: CBP CROSS · UK: HMRC ATaR · EU: BTI).

Nearby codes in heading 8404

The subheadings immediately before and after 8404.00 in chapter 84.

8404.10 Auxiliary plant for use with boilers of heading 8402 or 8403 8404.20 Condensers for steam or other vapor power units 8404.90 Parts

Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.

Frequently asked questions

Common questions about HS code 8404.00.

What is HS code 8404.00?

HS code 8404.00 covers: 8404 Auxiliary plant for use with boilers of heading 8402 or 8403 (for example, economisers, superheaters, soot removers, gas recoverers); condensers for steam or other vapour power units. It belongs to chapter 84 (Machinery and mechanical appliances; computers) of the Harmonized System.