This International Standard specifies stamp marking of transportable gas cylinders and tubes of volumes greater than 0,120 l and up to or equal to 3 000 l, including: -¾ð steel and aluminium-alloy gas cylinders; -¾ð composite gas cylinders; -¾ð acetylene cylinders; -¾ð liquefied petroleum gas (LPG) cylinders (see Annex A); and -¾ð small cylinders (see Annex B). These hereafter are referred to as "cylinders."