# HS code 7305.31: Other, welded, longitudinally welded

> HS code 7305.31 covers other, welded, longitudinally welded. It sits in heading 73.05 (other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross-sections, the external diameter of which exceeds 406.4mm, of iron or steel) in chapter 73 (articles of iron or steel). Other goods of heading 73.05 are classified under 7305.11 (line pipe of a kind used for oil or gas pipelines, longitudinally submerged arc welded), 7305.12 (line pipe of a kind used for oil or gas pipelines, other, longitudinally welded), 7305.19 (line pipe of a kind used for oil or gas pipelines, other), 7305.20 (casing of a kind used in drilling for oil or gas) or 2 others. National tariff lines under 7305.31 are live on border.bot for the United States (4 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/730531
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 73](https://border.bot/hs-codes/73) / [73.05](https://border.bot/hs-codes/7305) / [7305.31](https://border.bot/hs-codes/730531)

## Key facts

- HS code: 7305.31
- Covers: Other, welded, longitudinally welded
- Heading: [73.05: Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross-sections, the external diameter of which exceeds 406.4mm, of iron or steel](https://border.bot/hs-codes/7305)
- Chapter: [73: Articles of iron or steel](https://border.bot/hs-codes/73)
- Edition: HS2022
- Duty in the United States: [See its 4 lines](https://border.bot/countries/united-states/hs-codes/730531)

## What this code covers

HS code 7305.31 covers other, welded, longitudinally welded.

The legal text of the subheading is “Other, welded: Longitudinally welded”, read under “Other, welded”, in HS2022.

## What it doesn’t cover

Other goods of heading 73.05 are classified under 7305.11 (line pipe of a kind used for oil or gas pipelines, longitudinally submerged arc welded), 7305.12 (line pipe of a kind used for oil or gas pipelines, other, longitudinally welded), 7305.19 (line pipe of a kind used for oil or gas pipelines, other), 7305.20 (casing of a kind used in drilling for oil or gas) or 2 others.

- [7305.11](https://border.bot/hs-codes/730511) Line pipe of a kind used for oil or gas pipelines: Longitudinally submerged arc welded
- [7305.12](https://border.bot/hs-codes/730512) Line pipe of a kind used for oil or gas pipelines: Other, longitudinally welded
- [7305.19](https://border.bot/hs-codes/730519) Line pipe of a kind used for oil or gas pipelines: Other
- [7305.20](https://border.bot/hs-codes/730520) Casing of a kind used in drilling for oil or gas
- [7305.39](https://border.bot/hs-codes/730539) Other, welded: Other
- [7305.90](https://border.bot/hs-codes/730590) Other

## How it is structured

7305.31 is a six-digit subheading. Its first two digits, 73, are the chapter; the first four, 7305, are heading 73.05; the last two, 31, identify the subheading within the heading.

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

- Chapter 73: Articles of iron or steel
- Heading 73.05: Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross-sections, the external diameter of which exceeds 406.4mm, of iron or steel
- Within the heading: Other, welded
- Subheading 7305.31: Longitudinally welded

## In other countries

National tariff lines under 7305.31 are live on border.bot for the United States (4 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/730531): 4 lines, used by 1 other country

- Previous subheading: [7305.20](https://border.bot/hs-codes/730520) Casing of a kind used in drilling for oil or gas
- Next subheading: [7305.39](https://border.bot/hs-codes/730539) Other, welded: Other

## Frequently asked questions

### What does HS code 7305.31 cover?

HS code 7305.31 covers other, welded, longitudinally welded.

### Which heading and chapter is HS code 7305.31 in?

HS code 7305.31 is in heading 73.05 (other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross-sections, the external diameter of which exceeds 406.4mm, of iron or steel) in chapter 73 (articles of iron or steel).

### Where are goods of heading 73.05 classified when 7305.31 doesn’t fit?

Other goods of heading 73.05 are classified under 7305.11 (line pipe of a kind used for oil or gas pipelines, longitudinally submerged arc welded), 7305.12 (line pipe of a kind used for oil or gas pipelines, other, longitudinally welded), 7305.19 (line pipe of a kind used for oil or gas pipelines, other), 7305.20 (casing of a kind used in drilling for oil or gas) or 2 others.

### Which countries’ tariffs list national lines under HS code 7305.31?

National tariff lines under 7305.31 are live on border.bot for the United States (4 lines, 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/730531.json