Specifies requirements for welded steel cylinders with one longitudinal joint, and not more than two circumferential joints, of water capacity not less than 150 kg nor more than 500 kg, which have test pressures from 1750 kPa to 7000 kPa, and are intended for the storage and transport of compressed gases in accordance with AS 2030.1. This Standard covers cylinders previously specified in AS B115-1966, which has been declared 'obsolescent' in order to provide for the servicing of existing cylinders.