HS Code 840310: Boilers; central heating boilers (excluding those of heading no. 8402)

Q: Is HS code 840310 the same in every country?

Yes — HS code 840310 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 840310 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 840310?

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 840310.

What is HS Code 840310

HS Code 840310 covers Boilers; central heating boilers (excluding those of heading no. 8402). It is a 6-digit subheading — the deepest level of the international HS — within: · Section XVI — 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 · Heading 8403 — Central heating boilers; excluding those of heading no. 8402. At 6 digits, this code is the same in every HS-adopting country. From digit 7 onward, each country extends it.

Explore global 2026 latest import export trade data and shipment records for Central Heating Boilers on TradeInt global trade data platform

What does HS Code 840310 Boilers; central heating boilers (excluding those of heading no. 8402) 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 8403

Central heating boilers; excluding those of heading no. 8402

HS Code 840310

Boilers; central heating boilers (excluding those of heading no. 8402)

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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.

Top Trading Countries for Central Heating Boilers HS 840310

Mexico

Key Importer & Exporter

United States of America

Key Importer & Exporter

Viet Nam

Key Importer & Exporter

Frequently Asked Questions

What is HS code 840310?

HS code 840310 covers Boilers; central heating boilers (excluding those of heading no. 8402) under the WCO Harmonized System. It belongs to Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof), Heading 8403, and represents the most specific level of classification that is harmonized internationally.

Is HS code 840310 the same in every country?

Which WCO edition does HS code 840310 belong to, and has it been reclassified?

How do I find the correct country-specific version of HS code 840310?