# HS code 8481.40: Safety or relief valves

> HS code 8481.40 covers safety or relief valves. It sits in heading 84.81 (taps, cocks, valves and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.81 are classified under 8481.10 (pressure-reducing valves), 8481.20 (valves for oleohydraulic or pneumatic transmissions), 8481.30 (check (nonreturn) valves), 8481.80 (other appliances) or 1 other. National tariff lines under 8481.40 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/848140
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 84](https://border.bot/hs-codes/84) / [84.81](https://border.bot/hs-codes/8481) / [8481.40](https://border.bot/hs-codes/848140)

## Key facts

- HS code: 8481.40
- Covers: Safety or relief valves
- Heading: [84.81: Taps, cocks, valves and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves](https://border.bot/hs-codes/8481)
- 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/848140)

## What this code covers

HS code 8481.40 covers safety or relief valves.

The legal text of the subheading is “Safety or relief valves”, in HS2022.

## What it doesn’t cover

Other goods of heading 84.81 are classified under 8481.10 (pressure-reducing valves), 8481.20 (valves for oleohydraulic or pneumatic transmissions), 8481.30 (check (nonreturn) valves), 8481.80 (other appliances) or 1 other.

- [8481.10](https://border.bot/hs-codes/848110) Pressure-reducing valves
- [8481.20](https://border.bot/hs-codes/848120) Valves for oleohydraulic or pneumatic transmissions
- [8481.30](https://border.bot/hs-codes/848130) Check (nonreturn) valves
- [8481.80](https://border.bot/hs-codes/848180) Other appliances
- [8481.90](https://border.bot/hs-codes/848190) Parts

## How it is structured

8481.40 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8481, are heading 84.81; the last two, 40, 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 84.81: Taps, cocks, valves and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves
- Subheading 8481.40: Safety or relief valves

## In other countries

National tariff lines under 8481.40 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/848140): 1 line, used by 1 other country

- Previous subheading: [8481.30](https://border.bot/hs-codes/848130) Check (nonreturn) valves
- Next subheading: [8481.80](https://border.bot/hs-codes/848180) Other appliances

## Frequently asked questions

### What does HS code 8481.40 cover?

HS code 8481.40 covers safety or relief valves.

### Which heading and chapter is HS code 8481.40 in?

HS code 8481.40 is in heading 84.81 (taps, cocks, valves and similar appliances for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof).

### Where are goods of heading 84.81 classified when 8481.40 doesn’t fit?

Other goods of heading 84.81 are classified under 8481.10 (pressure-reducing valves), 8481.20 (valves for oleohydraulic or pneumatic transmissions), 8481.30 (check (nonreturn) valves), 8481.80 (other appliances) or 1 other.

### Which countries’ tariffs list national lines under HS code 8481.40?

National tariff lines under 8481.40 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/848140.json