This International Standard specifies the inspection requirements at the time of filling, and applies to seamless or welded transportable gas cylinders made of steel or aluminium-alloy (Type 1), and for composite transportable gas cylinders (Types 2-5 inclusive) for liquefied or compressed gases of a water capacity up to 150 l. It may be applied to cylinders and tubes with a water capacity between 150 l and 450 l provided they are inspected and filled as individual cylinders and tubes. This International Standard does not apply to acetylene or to cylinders or tubes manifolded in bundles, multiple-element gas container (MEGCs) or battery vehicles. This International Standard applies primarily to gases other than liquefied petroleum gas (LPG), but may also be applied to LPG. For specific LPG applications, refer to ISO 10691. For cylinders manifolded in bundles, refer to ISO 11755.