Aluminum cylinder serial numbers and markings

1st Row

Mark and explanation

• TC or CTC = Transport Canada
• 3ALM = Aluminum specification (Canada)
• 124 = Service pressure (bar)
• T11.3KG = Tare weight (Kilograms)

2nd Row

Mark and explanation

• DOT = US Department of Transportation
• 3AL = Aluminum specification (USA)
• 1800 = Service pressure (psi)
• U372530 = Serial number
• Luxfer or M#### = Manufacturing plant identifier

3rd Row

Mark and explanation

• 01 = Month of manufacture
• A = Mark of independent inspector
• 98 = Year of manufacture
• 20#CO2 = CO2 capacity
• TW24.9 = Tare wight (lbs)

Stamping layouts have changed slightly over the years. If in doubt, please contact customer service.