HS Code 8404Auxiliary 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
3 six-digit codes · Heading 4 of 86 in Chapter 84 · World Customs Organization Harmonized System
HS code 8404 covers the extra equipment that works beside a boiler, plus condensers for steam and other vapour power units. Use this page to match your product to the right subcode and the right heading.
“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” divides three ways under heading 8404 — 840410, 840420 and 840490. Each carries its own customs description, and the exact wording below is what a classification has to match. The heading is number 4 of 86 in Chapter 84, Machinery and mechanical appliances, boilers, nuclear reactors; parts thereof, which runs to 538 six-digit codes in all.
Six-digit codes under heading 8404
| HS Code | Import–export description |
|---|---|
| 840410 | Boilers; auxiliary plant, for use with boilers of heading no. 8402 or 8403 (e.g. economisers, super-heaters, soot removers, gas recoverers) |
| 840420 | Boilers; condensers, for steam or other vapour power units |
| 840490 | Boilers; parts of auxiliary plant, for use with boilers of heading no. 8402 and 8403 and parts of condensers for steam or other vapour power units |
What HS code 8404 covers
Think of a boiler as the main machine. Heading 8404 is for the helper equipment fitted around it. It also covers condensers used in steam and other vapour power units.
The boilers themselves are not classified here. Heading 8404 applies only when the equipment is made for use with boilers of those two headings, or when it is a condenser.
The sections below go through each subcode, so you can match your product to the exact wording.
Economisers, super-heaters and soot removers (840410)
The first subcode, 840410, is the home of boiler auxiliary plant. The official text names four examples: economisers (also spelled economizers), super-heaters (also spelled superheaters), soot removers and gas recoverers.
These are examples, not a closed list. Other auxiliary plant made for the same boilers can fit here too.
Check one point before you use this code. The plant must be meant for a boiler of heading 8402 or 8403. If it is not, another heading may apply. The HS code classifier can help you test your product.
Steam condensers (840420) and parts (840490)
If you need the HS code for a steam condenser, this is the one. It is meant for the condenser as a finished item.
Parts have their own code, 840490. A part of an economiser and a part of a condenser both land there. So do parts of other auxiliary plant used with those boilers.
The split is easy to remember. A complete piece of boiler auxiliary plant goes to 840410. A complete condenser goes to 840420. Any part of either goes to 840490. In every case, match your goods to the exact customs description of the code.
8404 vs 8402, 8403 and 8406
Buyers often mix up the boiler headings, so sort your item by what it does. If it makes the steam or the hot water, look at 8402 or 8403. If it helps one of those boilers, or condenses the vapour afterwards, it belongs in 8404.
If your item is a steam or other vapour turbine, go to HS 8406 steam turbines. A turbine is not a condenser, even when both work in the same plant.
Other heat and fuel equipment sits close by. See HS 8405 gas generators, HS 8416 furnace burners and HS 8419 heat-treatment plant. Read the full wording of each heading before you file.
Who imports boiler auxiliary plant under HS 8404?
To learn who trades in these goods, you need shipment records filed under the code. This page shows no figures, but the live records are one search away.
EximDataX shows shipment-level import and export records from official customs sources. Coverage: 43 direct customs feeds plus 184 mirror-derived countries. Named buyers and named suppliers are available in 38 of the 43 direct markets. Most markets refresh weekly and some refresh daily.
You can search by HS code to see who imports and exports a product, and book a free demo. You can also browse import data, export data, buyer data and supplier data from the links on this page.
Nearby headings in Chapter 84
- 8401Nuclear reactors; fuel elements (cartridges), non-irradiated, for nuclear…4 codes
- 8402Boilers; steam or other vapour generating (other than central heating hot…5 codes
- 8403Central heating boilers; excluding those of heading no. 84022 codes
- 8405Generators for producer or water gas with or without their purifiers…2 codes
- 8406Turbines; steam and other vapour turbines4 codes
- 8407Reciprocating or rotary internal combustion piston engines8 codes
- 8408Compression-ignition internal combustion piston engines (diesel or…3 codes
- 8409Parts suitable for use solely or principally with the engines of heading no.…3 codes
- 8410Turbines; hydraulic water wheels and regulators therefor4 codes
- 8411Turbo-jets, turbo-propellers and other gas turbines8 codes
- 8412Engines and motors; n.e.c. (e.g. reaction engines, hydraulic power engines…7 codes
- 8413Pumps; for liquids, whether or not fitted with measuring device, liquid…12 codes
Who ships under 8404?
EximDataX tracks the live import–export records filed under this heading and the 3 codes beneath it: named buyers, suppliers, quantities and values from official customs feeds.
Section XVI: Machinery, Electrical Equipment and Parts, chapters 84–85.
HS Code 8404: common questions
What is HS code 8404?
It groups boiler helper equipment and vapour condensers.
What is the HS code for an economiser or superheater?
Both are classified under 840410.
What is the HS code for a steam condenser?
Use 840420.
Where are parts of boiler auxiliary plant classified?
Under 840490. That code also takes parts of condensers.
What is the difference between HS 8402, 8403 and 8404?
8402 and 8403 are boiler headings. 8404 is not a boiler: it is the add-on equipment and the condensers.
How can I find importers and exporters of HS 8404 products?
Look up 8404 on EximDataX and open the records for the subcode you need.
See what your buyers are buying.Then decide.
Everything we show you comes from official customs filings — records, not claims. 30 minutes. Your shipment. Your HS code. Real platform. If you don’t see something new about your market by the end of the call, we walk away. No follow-ups.