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
Classification path
- 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
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- 25%
- Unit of quantity
- No., kg
Related lines in heading 7311
About heading 7311
Containers for compressed or liquefied gas, of iron or steel
Heading 7311 covers containers for compressed or liquefied gas made of iron or steel, such as cylinders, bottles and tanks built to hold gas under pressure. It splits into three lines: 7311.00.00.30 for seamless steel containers that are certified to the cited 49 CFR safety requirements before export and marked with a listed DOT designation, 7311.00.00.60 for other containers certified to those same requirements or a specific exemption, and 7311.00.00.90 for everything else in the heading. All three lines carry a general (MFN) rate of Free.
Full guide to heading 7311Products in this heading
- Seamless steel cylinders marked DOT 3AA for industrial gases
- Steel propane (LPG) cylinders for grills and forklifts
- CO2 cylinders for beverage dispensing and welding
- Scuba and breathing air tanks of steel
- Refrigerant recovery cylinders
- Compressed air tanks for shop use
- Acetylene and oxygen cylinders for welding
- Steel gas cartridges for portable burners
Frequently asked questions
What is the HTS code for steel propane cylinders?
A steel propane cylinder that is not a DOT-marked seamless container certified to the cited 49 CFR sections falls in 7311.00.00.90, which carries a general (MFN) rate of Free. If it is seamless and certified and marked with a listed DOT designation, it falls in 7311.00.00.30, also Free.
What is the duty on gas containers from heading 7311?
The general (MFN) rate is Free on all three lines: 7311.00.00.30, 7311.00.00.60 and 7311.00.00.90.
How do I classify a seamless DOT 3AA cylinder?
A seamless steel cylinder marked DOT 3AA and certified before export to the cited 49 CFR safety requirements is classified in 7311.00.00.30 at a general (MFN) rate of Free. Other certified containers that do not meet that description go in 7311.00.00.60, also Free.
Source: USITC Harmonized Tariff Schedule, retrieved October 22, 2026.