Customs code · HS subheading 8421 39

Final code reached

Non-catalytic equipment for filtering or purifying gases other than air

This is a complete 8-digit customs code. Exports and Intrastat use it as it is. For an import into the EU, pick a 10-digit line below.

This covers complete machines and equipment that filter or purify gases other than air without using a catalytic process. It does not cover the specifically excluded stainless-steel pump-housing design with inlet and outlet pipes having an internal diameter ≤ 1,3 cm, or catalysts for exhaust gases from combustion engines.

For example

Non-catalytic nitrogen-gas filtration equipment with a non-stainless-steel pump housing
Non-catalytic hydrogen-gas purification equipment with a non-stainless-steel pump housing

See the official tariff text

Official tariff text

Machinery and apparatus for filtering or purifying gases other than air (excl. isotope separators, those using a catalytic process, those with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm, and particulate filters for exhaust gases from internal combustion engines)

You are seeing what applies when you export from the EU. Switch above if you import.

You are seeing what applies when you import into the EU. Switch above if you export.

Your answer for export

The full EU export code is 8421 39 85.

You do not pick a 10-digit EU import line for an export declaration or Intrastat. The destination classifies the goods under its own tariff.

8 digits, ready

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

Their lines1 Norwegian line

84.21.3900 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

Duty free

Their lines2 British lines

8421 39 85 10 For use in civil aircraft

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

Their lines7 US lines
Entry dateSept. 17, 2026

8421.39.01.05 Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 1 Norwegian line

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

84.21.3900

Other

Ordinary duty

Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

See the 2 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

All 2 UK lines under this code

They all have the same duty rates shown here.

Ordinary duty

Duty free

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1599, last checked Sept. 13, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

See the 7 US lines

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

8421.39.01.05

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Dust collection and air purification equipment, For machine tools of headings 8456 through 8465, inclusive

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
8421.39.01.15

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Dust collection and air purification equipment, Other

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
8421.39.01.20

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Industrial gas cleaning equipment, Electrostatic precipitators

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
8421.39.01.30

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Industrial gas cleaning equipment, Other

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
8421.39.01.40

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Gas separation equipment

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
8421.39.01.60

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Pneumatic fluid power filters, rated at 550 kPa or greater

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99
8421.39.01.90

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other

General rate

Free

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Before you use the code

Check the facts that sit outside the code

The code can be right while what you pay still changes, because of where the goods come from, when they arrive, or extra EU measures.

Classify your own product, free Look up the current rates and rules

The product and its form Check that your product really matches this description, including what it is made of and the form it arrives in.
Country of origin Trade agreements, sanctions and extra measures can change the treatment of the very same code.
Current tariff measures Check today's rate, any restrictions or licences, and the quantity customs asks for, with Toldstyrelsen or TARIC.

What to do now for an import

The code is settled. What is left is the import declaration around it.

Choose the 10-digit import line Find the EU wording that matches the goods, and read the whole line before you pick it. 2 options Go to this section
State the country of origin: it decides the rate, sanctions and documents The same code can be charged and treated differently depending on where the goods were made.
Check today's requirements in TARIC Rates, quotas and document requirements change. The EU's own database is the current source. Open the EU TARIC database

Check it before you file This is a suggestion, please verify it against your own product.

On an EU import declaration

Pick the 10-digit line that matches the goods.

2 import lines

When these goods are imported into the EU, the declaration needs a 10-digit code. Under 8421 39 85 the EU tariff has 2 lines, each with its own wording.

You or your customs agent pick the line whose wording fits the goods; the last line, "Other", covers what none of the specific wordings describe.

Some lines depend on what the goods will be used for and need customs authorisation; matching the wording alone does not give a lower rate.

Match the whole wording A line is its own wording plus the grouping text above it. Read both before you settle on one.
Check the intended use On some lines the lower rate belongs to what the goods will be used for, not to the goods alone.
Confirm the authorisation Where the lower rate carries conditions, customs asks for an authorisation before it can be used.

8421 39 85 10

For use in civil aircraft

Duty suspension: 0% for aircraft parts with an airworthiness certificate

Conditions apply, customs authorisation needed.

This line in the EU tariff Rulings on this line
8421 39 85 90

Other

1.7%

Duty suspension: 0% for ships, boats and drilling platforms

Conditions apply, customs authorisation needed.

This line in the EU tariff Rulings on this line

A suspension is a lower rate the EU grants for specific products; whether your goods qualify depends on the line's wording and conditions.

Exports from the EU and Intrastat normally use the 8-digit code as it is.

EU tariff data of Sept. 13, 2026.

Rates, origin and documents

Read the signals first. Open only the ones you want to check.

Besides the ordinary duty, the EU records these kinds of measure against this code. They are listed as signals only: whether one applies to your goods can depend on where they come from, who produced them, the exact product and the documents you present. No amounts are worked out here.

Data of Sept. 1, 2026

Lower duty for goods from some countries

Possible

Preferential rates exist for goods originating in:

Andorra
San Marino
Türkiye
European Union
Comoros (excluding Mayotte), Madagascar, Mauritius, Seychelles and dependencies and Zimbabwe
Botswana, Eswatini, Lesotho, Mozambique and Namibia
Western Sahara
European Union, Iceland, Liechtenstein and Norway
+39 origins

These rates apply to Economic Partnership Agreements; CARIFORUM except Haiti; GSP-EBA (Special arrangement for the least-developed countries - Everything But Arms); GSP+ (incentive arrangement for sustainable development and good governance); OCTs (Overseas Countries and Territories); GSP - General arrangements except India.

Whether you can use one depends on the origin rules for the goods and on the documentation you can show.

Check this code in the official EU TARIC database

Restrictions and paperwork

Important

Import restrictions are recorded for goods originating in:

North Korea (Democratic People’s Republic of Korea)
Ukraine
Belarus
Russian Federation

The EU records document conditions on this code. What customs may ask for depends on where the goods come from, exactly what the product is and the customs procedure.

Proof of origin 2 conditions

If you claim a lower rate for goods from a country the EU has a trade agreement with, customs asks for proof of origin, for example a EUR.1 certificate or an origin declaration.

Show the EU's own wording for these conditions

Movement certificate EUR.1
Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document

Sanctions and restricted regions 10 conditions

Some conditions come from EU sanctions rules. They matter when the goods are linked to a country or region the EU restricts trade with.

Show the EU's own wording for these conditions

Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)
Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 8f of Regulation (EU) No 765/2006)
Import authorisation by virtue of article 1ra paragraph 10 of Council Regulation (EU) 765/2006
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 4)
The prohibitions defined in article 1ra paragraph 1 of Council Regulation (EU) No 765/2006 do not apply (see exemptions in article 1ra paragraph 3)
The prohibitions defined in article 3i.1 of Council Regulation (EU) No 833/2014 do not apply (see exemptions in article 3i.3aa)
Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014
Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)
Import authorisation by virtue of article 3i paragraph 3c of Council Regulation (EU) 833/2014

Check this code in the official EU TARIC database

EU tariff measure data of Sept. 1, 2026.

One last classification check

Check the path and the nearest alternatives.

Use this view if you are still unsure the code describes the product precisely.

How we got to this code

XVI
84
8421
8421 39
8421 39 85

Show the steps

The path to this code

Every level is settled. Open an earlier step if you need to change a choice.

Step 5 of 5 · Complete

Step 1 · Section XVI Machinery and mechanical appliances; electrical equ…
Is the product a machine, apparatus or mechanical tool, or is it electrical equipment, a sound recorder or player, or a television image and sound recorder or player?
✓
Step 2 · Chapter 84 Nuclear reactors, boilers, machinery and mechanical… 1 of 2 chapters in section XVI
What is the machine, appliance or part specifically designed to do?
✓
Step 3 · Heading 8421 Centrifuges, incl. centrifugal dryers (excl. those … 21 of 86 headings under chapter 84
Is the item a centrifuge, a machine or apparatus for filtering or purifying liquids or gases, or a part for one of these products—and, if it is a centrifuge or filter, is it for a specific use named below?
✓
Step 4 · Subheading 8421 39 Machinery and apparatus for filtering or purifying … 10 of 12 subheadings under heading 8421
Which description applies: a gas-filtering machine with a stainless-steel casing and inlet and outlet pipe openings with an internal diameter not over 1.3 cm; an air-filtering machine; a machine for filtering non-air gases by a catalytic process; or a machine for filtering non-air gases that does not use a catalytic process?
✓
Step 5 · Full code 8421 39 85 Machinery and apparatus for filtering or purifying … 4 of 4 codes under subheading 8421 39

Compare with the codes next to it.

Compare the sibling codes at this level before you settle on this one.

another option 8421 39 15 Machinery and apparatus for filtering or purifying gases, with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm Duty free
another option 8421 39 25 Machinery and apparatus for filtering or purifying air (excl. intake air filters for internal combustion engines, and those with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm) 1.7%
another option 8421 39 35 Machinery and apparatus for filtering or purifying gases other than air by a catalytic process (excl. those with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm, and catalytic converters for exhaust gases from internal combustion engines) 1.7%
you are here 8421 39 85 Machinery and apparatus for filtering or purifying gases other than air (excl. isotope separators, those using a catalytic process, those with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm, and particulate filters for exhaust gases from internal combustion engines) 1.7%

Worth comparing

Codes that sit close to this one, for when the material itself could be different.

Browse chapter 84

Often confused with

8421 39 15 Machinery and apparatus for filtering or purifying gases, with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm Duty free
That code covers the stated stainless-steel housing design with inlet and outlet openings having an internal diameter ≤ 1,3 cm; this code excludes that design.
8421 39 25 Machinery and apparatus for filtering or purifying air (excl. intake air filters for internal combustion engines, and those with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm) 1.7%
That code is for equipment filtering or purifying air, while this code is for gases other than air.
8421 39 35 Machinery and apparatus for filtering or purifying gases other than air by a catalytic process (excl. those with stainless steel housing and with inlet and outlet tube bores with inside diameters <= 1,3 cm, and catalytic converters for exhaust gases from internal combustion engines) 1.7%
That code covers gas filtration or purification by a catalytic process, while this code excludes catalytic equipment.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.