Defines the requirements for gas cylinder valves and the method of testing such valves, for type approval. Applies to valves to be fitted to gas cylinders, up to 150L water capacity, intended to convey compressed, liquefied or dissolved gases. Applies to valves operated by a hand wheel or a key. Does not apply to valves for breathing equipment, cryogenic equipment, fire extinguishers or liquefied petroleum gas (LPG)