DS DS/EN ISO 13769
DS DSEN SO 13769 2009-JUN-29 Gas cylnders - Stamp markng
This International Standard specifies stamp marking of refillable transportable gas cylinders and tubes of volume greater than 0,5 l and less than or equal to 3 000 l, including: . steel and aluminium gas cylinders; . composite gas cylinders; . acetylene cylinders; . LPG cylinders (see Annex B). These are hereafter referred to as "cylinders".