Compressed Gas Shipping: IATA and IMDG Class 2 Requirements

Class 2 Compressed Gas Shipping Under IATA and IMDG

Compressed gases—from industrial welding gases to medical oxygen to aerosol products—fall under Class 2 dangerous goods regulations. South Florida businesses shipping gases internationally must comply with IATA and IMDG requirements that address the unique hazards of pressurized containers.

Class 2 Divisions

Class 2 is divided into three divisions: Division 2.1 (Flammable Gases like propane, butane, and acetylene), Division 2.2 (Non-flammable, Non-toxic Gases like nitrogen, argon, and CO2), and Division 2.3 (Toxic Gases like chlorine, ammonia, and hydrogen cyanide). Each division carries different transport restrictions.

Cylinder and Container Requirements

Gas cylinders must meet DOT or UN specifications, be within their retest dates, and have proper valve protection during transport. Cylinder condition—no dents, corrosion, or arc strikes—must be verified before offering for transport. Defective cylinders are rejected at cargo acceptance.

IATA Air Transport Limitations

Many compressed gases are forbidden on passenger aircraft. Division 2.3 toxic gases are generally forbidden on all aircraft. Even permitted gases have strict quantity limits per package and per aircraft. Airlines may impose additional restrictions beyond IATA minimums.

IMDG Ocean Transport Provisions

Ocean shipping allows larger quantities of compressed gases but requires proper stowage—typically on deck for flammable and toxic gases. Segregation from heat sources, ignition risks, and incompatible cargo classes is strictly enforced on vessels.

Aerosol Products (UN1950)

Aerosol cans are one of the most commonly shipped Class 2 items. Aerosols may carry subsidiary risks (flammable, corrosive) that affect packaging and transport requirements. South Florida’s cosmetic and household product industries ship millions of aerosols annually through a freight forwarder with aerosol expertise.

Refrigerant Gas Shipping

HVAC refrigerants (R-410A, R-134a, R-32) are Class 2 gases with specific shipping requirements. South Florida’s massive air conditioning market generates significant demand for compliant refrigerant shipping via both air and ocean freight.