cylinder-requirements-49cfr-178

name	cylinder-requirements-49cfr-178
description	Use when shipping compressed gases in cylinders. Covers DOT cylinder specs, requalification, valve protection, and segregation.

Cylinder Requirements 49Cfr 178

Cylinders for compressed/liquefied gas under DOT-spec or UN-spec.

Common specs

• DOT-3A, 3AA: Standard steel (oxygen, nitrogen, air)
• DOT-3AL: Aluminum
• DOT-3HT: High-strength
• DOT-3T: Tube cylinder

Requalification

Every 5-10 years depending on cylinder + service.

Valve protection

Cap or cage during transport. Valve closed unless actively dispensing.

Common findings

Expired requalification (stamping unreadable). Missing valve protection. Damaged cylinder still in service.

Where this fits in X3 Compass

Applied in the X3 Compass Hazmat Center add-on.