DOT 3A Seamless Steel Gas Cylinder
A seamless steel cylinder certified under DOT 3A specifications for compressed gases, marked accordingly and not overwrapped. It complies with 49 CFR 178.36 safety requirements for high-pressure gas storage and transport. Used for industrial gases like oxygen or nitrogen.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If overwrapped with protective material
Overwrapped seamless steel containers fall under a separate statistical suffix to distinguish from non-overwrapped ones.
If designed for retail sale as household propane tanks
Smaller reservoirs for liquefied petroleum gas may shift to Chapter 73 heading 7309 if end-use is consumer retail.
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Import Tips & Compliance
• Verify DOT marking (e.g
• DOT 3A) and hydrostatic test dates on each cylinder before export
• Obtain manufacturer's certification of compliance with 49 CFR 178.36-178.68; retain for CBP review
• Avoid overwrapping to stay under this subheading; common pitfall is misclassifying wrapped cylinders
Related Products under HTS 7311.00.00.30
DOT 3AA Seamless Steel Oxygen Cylinder
High-strength seamless steel cylinder marked DOT 3AA for medical or industrial oxygen storage, not overwrapped. Meets DOT safety standards under 49 CFR for pressures up to 1800 psi. Essential for welding, healthcare, and diving applications.
DOT 3B Seamless Steel Helium Balloon Cylinder
Seamless steel cylinder marked DOT 3B for helium party balloons or blimps, without overwrap. Complies with 49 CFR safety for lighter-than-air gas containment. Portable size for event use.
DOT 3E Small Steel Paintball Tank
Compact seamless steel tank marked DOT 3E for paintball markers, not overwrapped. Meets DOT specs for 3000 psi compressed air. Lightweight for sports and recreational use.
DOT 3HT Hydrogen Fuel Cylinder
Heat-treated seamless steel cylinder marked DOT 3HT for hydrogen fuel cells or storage, no overwrap. Designed for ultra-high pressures per 49 CFR. Used in automotive and energy applications.
DOT 3T Thick-Wall Steel Gas Bottle
Thick-walled seamless steel bottle marked DOT 3T for specialty compressed gases, unwrapped. High-strength per CFR for corrosive or reactive gases. Industrial lab use.
DOT-E Exempt Seamless Steel Cylinder
Seamless steel cylinder under specific DOT-E exemption, marked with exemption number, not overwrapped. Custom certified for unique gas applications per 49 CFR. For experimental or prototype uses.