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Understanding CO2 Cylinder Marking

I had recently acquired a CO2 cylinder which has the below marking and after some  on-line  research I found that the meaning is as follows: CO2 - 2 TP250 V3.0 W6.13 BXXXX XXX 2011/03 Marking Meaning : CO2-2:  Filling gases - Carbon Dioxide  TP250:  Test pressure - 25MPA  V3.0:  Volume - 3.0L  W6.1:  Weight - 6.1KG  BXXXX XXX:  Product No. 2011/03:   Hydrostatic Test Date -  CO2 cylinders needs hydrostatic testing every 5 years