# HS code 7303.00: Tubes, pipes and hollow profiles, of cast iron

> HS code 7303.00 covers tubes, pipes and hollow profiles, of cast iron. It sits in heading 73.03 (tubes, pipes and hollow profiles, of cast iron) in chapter 73 (articles of iron or steel). It is the only subheading of heading 73.03, so every good of the heading is classified here. National tariff lines under 7303.00 are live on border.bot for the United States (3 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/730300
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 73](https://border.bot/hs-codes/73) / [73.03](https://border.bot/hs-codes/7303) / [7303.00](https://border.bot/hs-codes/730300)

## Key facts

- HS code: 7303.00
- Covers: Tubes, pipes and hollow profiles, of cast iron
- Heading: [73.03: Tubes, pipes and hollow profiles, of cast iron](https://border.bot/hs-codes/7303)
- Chapter: [73: Articles of iron or steel](https://border.bot/hs-codes/73)
- Edition: HS2022
- Duty in the United States: [See its 3 lines](https://border.bot/countries/united-states/hs-codes/730300)

## What this code covers

HS code 7303.00 covers tubes, pipes and hollow profiles, of cast iron.

The legal text of the subheading is “Tubes, pipes and hollow profiles, of cast iron”, in HS2022.

## What it doesn’t cover

It is the only subheading of heading 73.03, so every good of the heading is classified here.

## How it is structured

7303.00 is a six-digit subheading. Its first two digits, 73, are the chapter; the first four, 7303, are heading 73.03; the last two, 00, 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 73.03: Tubes, pipes and hollow profiles, of cast iron
- Subheading 7303.00: Tubes, pipes and hollow profiles, of cast iron

## In other countries

National tariff lines under 7303.00 are live on border.bot for the United States (3 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/730300): 3 lines, used by 1 other country

- Previous subheading: [7302.90](https://border.bot/hs-codes/730290) Other
- Next subheading: [7304.11](https://border.bot/hs-codes/730411) Line pipe of a kind used for oil or gas pipelines: Of stainless steel

## Frequently asked questions

### What does HS code 7303.00 cover?

HS code 7303.00 covers tubes, pipes and hollow profiles, of cast iron.

### Which heading and chapter is HS code 7303.00 in?

HS code 7303.00 is in heading 73.03 (tubes, pipes and hollow profiles, of cast iron) in chapter 73 (articles of iron or steel).

### Where are goods of heading 73.03 classified when 7303.00 doesn’t fit?

7303.00 is the only subheading of heading 73.03, so every good of the heading is classified there.

### Which countries’ tariffs list national lines under HS code 7303.00?

National tariff lines under 7303.00 are live on border.bot for the United States (3 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/730300.json