This Standard specifies the markings and coulour code to identify the contents of cylinders to be used in Australia in accordance with AS 2030, Part 1 or Part 2, for the storage and transport of compressed industrial gases. The cylinders are of water capacity exceeding 0.1 kg and not exceeding 500 kg. The markings also provide for identification of cylinders for liquid withdrawal fitted with educator tubes. This Standard is not intended to apply to clinders for portable breathing apparatus (underwater and non-underwater or for portable fire extinguishers. For identification of those cylinders, refer to the particular product or application standard.