HS Code 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus for liquids or gases

Q: Is HS code 8421 the same in every country?

Yes — HS code 8421 is part of the WCO Harmonized System and is the same in every WCO member country at the 6-digit level. Beyond 6 digits, each country extends the code under its own system (e.g. HTSUS in the US, CN/TARIC in the EU, HSK in Korea, CCCHS in China) for national tariff rates and trade statistics. To see how a specific country classifies this code, select a country.

Q: Which WCO edition does HS code 8421 belong to, and has it been reclassified?

The Harmonized System is maintained by the World Customs Organization (WCO) and revised approximately every five years. The current edition is HS 2022, which replaced HS 2017 on 1 January 2022. Codes are added, merged, or split between editions to reflect new products and trade patterns, so a code valid in one edition may not exist or may mean something different in another.

Q: How do I find the correct country-specific version of HS code 8421?

Beyond the international 6-digit level, each country adds its own digits — the US extends to 10 digits (HTSUS), the EU to 8 or 10 (CN/TARIC), China to 13 (CCCHS), Korea to 10 (HSK), Japan to 9, and so on. To find the full code used by a specific country, select a country in TradeInt's HS Code Tool and search for 8421.

What is HS Code 8421

HS Code 8421 covers Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus for liquids or gases. It is a 4-digit heading within Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof), Section XVI. Its 6-digit subheadings are identical in every HS-adopting country; from the 7th digit onward, each country extends the code for its own tariff and statistics.

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What does HS Code 8421 Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus for liquids or gases Cover?

Section XVI

Chapters (84-85) Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles

Chapter 84

Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

HS Code 8421

Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus for liquids or gases

HS Code 842111

Centrifuges; cream separators

HS Code 842119

Centrifuges; n.e.c. in heading no. 8421, including centrifugal dryers (but not clothes-dryers)

HS Code 842121

Machinery; for filtering or purifying water

HS Code 842122

Machinery; for filtering or purifying beverages other than water

HS Code 842123

Machinery; filtering or purifying machinery, oil or petrol filters for internal combustion engines

HS Code 842129

Machinery; for filtering or purifying liquids, n.e.c. in item no. 8421.2

HS Code 842139

Machinery; for filtering or purifying gases, other than intake air filters, catalytic converters or particulate filters for internal combustion engines

HS Code 842191

Centrifuges; parts thereof, including parts for centrifugal dryers

HS Code 842199

Machinery; parts for filtering or purifying liquids or gases

HS Code 842112

Centrifuges; clothes-dryers

HS Code 842131

Machinery; intake air filters for internal combustion engines

HS Code 842132

Machinery; catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines

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What HS Codes for Machinery Do Not Cover

Chapter 84 covers nuclear reactors, boilers, machinery, and mechanical appliances. Goods frequently misclassified here but that belong elsewhere include:

Electrical machinery and equipment

Chapter 85

Vehicles, aircraft, ships

Chapters 86–89

Optical, medical, and measuring instruments

Chapter 90

Arms and ammunition

Chapter 93

This list highlights common classification errors only — it is not exhaustive. For binding classification, work with a licensed customs broker or qualified trade compliance professional.

Related HS Codes under Centrifuges and Filters HS 8421

HS Code 842111

Centrifuges; cream separators

HS Code 842112

Centrifuges; clothes-dryers

HS Code 842119

Centrifuges; n.e.c. in heading no. 8421, including centrifugal dryers (but not clothes-dryers)

HS Code 842121

Machinery; for filtering or purifying water

HS Code 842122

Machinery; for filtering or purifying beverages other than water

HS Code 842123

Machinery; filtering or purifying machinery, oil or petrol filters for internal combustion engines

HS Code 842129

Machinery; for filtering or purifying liquids, n.e.c. in item no. 8421.2

HS Code 842131

Machinery; intake air filters for internal combustion engines

HS Code 842132

Machinery; catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines

HS Code 842139

Machinery; for filtering or purifying gases, other than intake air filters, catalytic converters or particulate filters for internal combustion engines

Frequently Asked Questions

What is HS code 8421?

HS code 8421 covers Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus for liquids or gases, a heading within Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof) of the WCO Harmonized System. Headings sit between the broad chapter level and the more specific 6-digit subheading level.

Is HS code 8421 the same in every country?

Which WCO edition does HS code 8421 belong to, and has it been reclassified?

How do I find the correct country-specific version of HS code 8421?