Serial numbers explained

1. M25 x 2 = Thread Specification - Important to ensure the correct valve is used with your cylinder.
2. UK = Country of Manufacture
3. LUXFER = Cylinder Manufacturer
4. L3158V....= Cylinder Type Number and Serial Number - This number is recorded by Luxfer which means, if ever necessary, the entire manufacturing history of your cylinder can be traced.
5. AA6061 T6 = Alloy of Construction
6. 4,4MM = Design Minimum Wall Thickness.
7. 2,4KG = Empty Weight of Cylinder Only (kg)
8. 3L = Minimum Water Capacity (litres)
9. PT 212 BAR = (Test Pressure) - Shows the pressure that the cylinder should be tested to - this must not be exceeded.
10. 2 KG CO2 = Charge Weight
11. PS 169,3 BAR AT 60°C = (Service Pressure) - Shows the maximum service pressure and operating temperature for which the cylinder design is approved.
12. TARE 2,9 KG = Weight of Cylinder plus valve and, if fitted, dip tube.
13. GROSS 5,9 KG = Tare Weight plus Charge Weight. (Optional)
14. This is the mark of Conformity and Notified Body Reference Number according to the Pressure Equipment Directive 97/23/EC.
15. 2002/10 = (Test Date) - Year and Month of initial test.

1. 25E = Thread Specification - Important to ensure the correct valve is used with your cylinder.
2. GB = Country of Manufacture
3. LUXFER = Cylinder Manufacturer
4. L2816Z ....= Cylinder Type Number and Serial Number - This number is recorded by Luxfer which means, if ever necessary, the entire manufacturing history of your cylinder can be traced.
5. AA6061 T6 = Alloy of Construction
6. 11,5MM = Design Minimum Wall Thickness.
7. 14,8KG = Empty Weight of Cylinder Only (kg)
8. 13,4L = Minimum Water Capacity (litres)
9. PH 250 BAR = (Test Pressure) - Shows the pressure that the cylinder should be tested to - this must not be exceeded.
10. TARE 16,1 KG = Weight of cylinder plus valve plus any accessories fitted at time of filling such as collar and cage.
11. 10 KG CO2 = Charge Weight.
12. p 0038 = The mark of Conformity and Notified Body reference number to the Transportable Pressure Equipment Directive 1999/36/EC.
13. e2UK902 GB = Pattern Approval number according to Directive 84/526. Replaced by EN1975 when this specification is design basis.
14. [STAMP] = Stamp of Notified Body.
15. 2002/09 = Year and Month of initial test.

Mark and explanation

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

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

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.

1. M25 x 2 = Thread Specification - Important to ensure the correct valve is used with your cylinder.
2. UK = Country of Manufacture
3. LUXFER = Cylinder Manufacturer
4. P3173V....= Cylinder Type Number and Serial Number - This number is recorded by Luxfer which means, if ever necessary, the entire manufacturing history of your cylinder can be traced.
5. AA6061 T6 = Alloy of Construction
6. 11,6MM = Design Minimum Wall Thickness.
7. 9,8KG = Empty Weight of Cylinder Only (kg)
8. 7L = Minimum Water Capacity (litres)
9. PW 232 BAR = (Working Pressure) - Shows the pressure that the cylinder should be filled to - this must not be exceeded.
10. PT 348 BAR = (Test Pressure) - Shows the pressure that the cylinder should be tested to - this must not be exceeded.
11. PS 287 BAR AT 60°C = (Service Pressure) - Shows the maximum service pressure and operating temperature for which the cylinder design is approved. This must not be confused with the working pressure (9).
12. This is the mark of Conformity and Notified Body Reference Number according to the Pressure Equipment Directive 97/23/EC.
13. 2002/ 2 = (Test Date) - Year and Quarter of year of initial test.

1. 25E = Thread Specification - Important to ensure the correct valve is used with your cylinder.
2. GB = Country of Manufacture
3. LUXFER = Cylinder Manufacturer
4. P3136Z ....= Cylinder Type Number and Serial Number - This number is recorded by Luxfer which means, if ever necessary, the entire manufacturing history of your cylinder can be traced.
5. AA6061 T6 = Alloy of Construction
6. 11,8MM = Design Minimum Wall Thickness.
7. 12,4KG = Empty Weight of Cylinder Only (kg)
8. 10L = Minimum Water Capacity (litres)
9. PW200 BAR = (Working Pressure) - Shows the pressure that the cylinder should be filled to - this must not be exceeded.
10. PH300 BAR = (Test Pressure) - Shows the pressure that the cylinder should be tested to - this must not be exceeded.
11. p 0038 = The mark of Conformity and Notified Body reference number to the Transportable Pressure Equipment Directive 1999/36/EC.
12. e2UK907 GB = Pattern Approval number according to Directive 84/526. Replaced by EN1975 when this specification is design basis. 
13. [STAMP] = Stamp of Notified Body.
14. 2002/09 = Year and Month of initial test.