Typical markings for a SCUBA cylinder according to PED
M25 x 2 = Thread Specification - Important to ensure the correct valve is used with your cylinder.
UK = Country of Manufacture
LUXFER = Cylinder Manufacturer
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.
AA6061 T6 = Alloy of Construction
11,6MM = Design Minimum Wall Thickness.
9,8KG = Empty Weight of Cylinder Only (kg)
7L = Minimum Water Capacity (litres)
PW 232 BAR = (Working Pressure) - Shows the pressure that the cylinder should be filled to - this must not be exceeded.
PT 348 BAR = (Test Pressure) - Shows the pressure that the cylinder should be tested to - this must not be exceeded.
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
This is the mark of Conformity and Notified Body Reference Number according to the Pressure Equipment Directive 97/23/EC.
2002/ 2 = (Test Date) - Year and Quarter of year of initial test.