# HS code 8402.12: Steam or other vapour generating boilers, watertube boilers with a steam production not exceeding 45t per hour

> HS code 8402.12 covers steam or other vapour generating boilers, watertube boilers with a steam production not exceeding 45t per hour. It sits in heading 84.02 (steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.02 are classified under 8402.11 (steam or other vapour generating boilers, watertube boilers with a steam production exceeding 45t per hour), 8402.19 (steam or other vapour generating boilers, other vapour generating boilers, including hybrid boilers), 8402.20 (super-heated water boilers) or 8402.90 (parts). National tariff lines under 8402.12 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/840212
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 84](https://border.bot/hs-codes/84) / [84.02](https://border.bot/hs-codes/8402) / [8402.12](https://border.bot/hs-codes/840212)

## Key facts

- HS code: 8402.12
- Covers: Steam or other vapour generating boilers, watertube boilers with a steam production not exceeding 45t per hour
- Heading: [84.02: Steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers](https://border.bot/hs-codes/8402)
- Chapter: [84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof](https://border.bot/hs-codes/84)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/840212)

## What this code covers

HS code 8402.12 covers steam or other vapour generating boilers, watertube boilers with a steam production not exceeding 45t per hour.

The legal text of the subheading is “Steam or other vapour generating boilers: Watertube boilers with a steam production not exceeding 45t per hour”, read under “Steam or other vapour generating boilers”, in HS2022.

## What it doesn’t cover

Other goods of heading 84.02 are classified under 8402.11 (steam or other vapour generating boilers, watertube boilers with a steam production exceeding 45t per hour), 8402.19 (steam or other vapour generating boilers, other vapour generating boilers, including hybrid boilers), 8402.20 (super-heated water boilers) or 8402.90 (parts).

- [8402.11](https://border.bot/hs-codes/840211) Steam or other vapour generating boilers: Watertube boilers with a steam production exceeding 45t per hour
- [8402.19](https://border.bot/hs-codes/840219) Steam or other vapour generating boilers: Other vapour generating boilers, including hybrid boilers
- [8402.20](https://border.bot/hs-codes/840220) Super-heated water boilers
- [8402.90](https://border.bot/hs-codes/840290) Parts

## How it is structured

8402.12 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8402, are heading 84.02; the last two, 12, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof
- Heading 84.02: Steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers
- Within the heading: Steam or other vapour generating boilers
- Subheading 8402.12: Watertube boilers with a steam production not exceeding 45t per hour

## In other countries

National tariff lines under 8402.12 are live on border.bot for the United States (1 line, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/840212): 1 line, used by 1 other country

- Previous subheading: [8402.11](https://border.bot/hs-codes/840211) Steam or other vapour generating boilers: Watertube boilers with a steam production exceeding 45t per hour
- Next subheading: [8402.19](https://border.bot/hs-codes/840219) Steam or other vapour generating boilers: Other vapour generating boilers, including hybrid boilers

## Frequently asked questions

### What does HS code 8402.12 cover?

HS code 8402.12 covers steam or other vapour generating boilers, watertube boilers with a steam production not exceeding 45t per hour.

### Which heading and chapter is HS code 8402.12 in?

HS code 8402.12 is in heading 84.02 (steam or other vapour generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof).

### Where are goods of heading 84.02 classified when 8402.12 doesn’t fit?

Other goods of heading 84.02 are classified under 8402.11 (steam or other vapour generating boilers, watertube boilers with a steam production exceeding 45t per hour), 8402.19 (steam or other vapour generating boilers, other vapour generating boilers, including hybrid boilers), 8402.20 (super-heated water boilers) or 8402.90 (parts).

### Which countries’ tariffs list national lines under HS code 8402.12?

National tariff lines under 8402.12 are live on border.bot for the United States (1 line, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Machine-readable: https://border.bot/hs-codes/840212.json