# United States tariff line 7311.00.00.30: Seamless steel containers not overwrapped, marked DOT 3A, 3AX, 3AA, 3AAX, 3B, 3E, 3HT, 3T or DOT-E followed by a specific exemption number

> In the United States tariff, line 7311.00.00.30 covers containers for compressed or liquefied gas, of iron or steel, certified prior to exportation to have been made in accordance with the safety requirements of sections 178.36 through 178.68 of title 49 CFR or under a specific exemption to those requirements, seamless steel containers not overwrapped, marked DOT 3A, 3AX, 3AA, 3AAX, 3B, 3E, 3HT, 3T or DOT-E followed by a specific exemption number. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 7311.00 in heading 73.11 (chapter 73).

Source: https://border.bot/countries/united-states/hs-codes/7311000030
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 73](https://border.bot/countries/united-states/hs-codes/73) / [7311.00](https://border.bot/countries/united-states/hs-codes/731100) / [7311.00.00.30](https://border.bot/countries/united-states/hs-codes/7311000030)

## Key facts

- Tariff line: 7311.00.00.30
- Covers: Containers for compressed or liquefied gas, of iron or steel, certified prior to exportation to have been made in accordance with the safety requirements of sections 178.36 through 178.68 of title 49 CFR or under a specific exemption to those requirements, seamless steel containers not overwrapped, marked DOT 3A, 3AX, 3AA, 3AAX, 3B, 3E, 3HT, 3T or DOT-E followed by a specific exemption number
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [7311.00](https://border.bot/hs-codes/731100)

## What this line covers

In the United States tariff, line 7311.00.00.30 covers containers for compressed or liquefied gas, of iron or steel, certified prior to exportation to have been made in accordance with the safety requirements of sections 178.36 through 178.68 of title 49 CFR or under a specific exemption to those requirements, seamless steel containers not overwrapped, marked DOT 3A, 3AX, 3AA, 3AAX, 3B, 3E, 3HT, 3T or DOT-E followed by a specific exemption number.

Its legal text is “Seamless steel containers not overwrapped, marked DOT 3A, 3AX, 3AA, 3AAX, 3B, 3E, 3HT, 3T or DOT-E followed by a specific exemption number”, read under “Certified prior to exportation to have been made in accordance with the safety requirements of sections 178.36 through 178.68 of title 49 CFR or under a specific exemption to those requirements”.

## How it is structured

It falls under HS subheading 7311.00 in heading 73.11 (chapter 73). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 73: Articles of iron or steel
- Heading 73.11: Containers for compressed or liquefied gas, of iron or steel
- Subheading 7311.00: Certified prior to exportation to have been made in accordance with the safety requirements of sections 178.36 through 178.68 of title 49 CFR or under a specific exemption to those requirements
- Line 7311.00.00.30: Seamless steel containers not overwrapped, marked DOT 3A, 3AX, 3AA, 3AAX, 3B, 3E, 3HT, 3T or DOT-E followed by a specific exemption number

## Duty

Goods under this line enter free of general (MFN) duty.

The rate is published on 7311.00.00.

## In other countries

No other national tariff on border.bot has live lines under 7311.00 yet.

- [The Harmonized System text for 7311.00](https://border.bot/hs-codes/731100)

## Other lines under 7311.00

- [7311.00.00.60](https://border.bot/countries/united-states/hs-codes/7311000060) Other
- [7311.00.00.90](https://border.bot/countries/united-states/hs-codes/7311000090) Other

- Previous line: [7310.29.00.65](https://border.bot/countries/united-states/hs-codes/7310290065) Other
- Next line: [7311.00.00.60](https://border.bot/countries/united-states/hs-codes/7311000060) Other

## Frequently asked questions

### What does tariff line 7311.00.00.30 cover in the United States tariff?

In the United States tariff, line 7311.00.00.30 covers containers for compressed or liquefied gas, of iron or steel, certified prior to exportation to have been made in accordance with the safety requirements of sections 178.36 through 178.68 of title 49 CFR or under a specific exemption to those requirements, seamless steel containers not overwrapped, marked DOT 3A, 3AX, 3AA, 3AAX, 3B, 3E, 3HT, 3T or DOT-E followed by a specific exemption number.

### What is the general (MFN) duty on 7311.00.00.30 in the United States?

Goods under this line enter free of general (MFN) duty. The rate is published on 7311.00.00.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/7311000030.json