Specifies the designations and requirements for design, construction, testing and marking of safety devices required by AS 2030, to be fitted to gas cylinders and may be suitable for LPG fuel vessels covered by AS 1425. Provides for both metallic and non-metallic fusible plugs, bursting discs, pressure relief valves, and combinations of these. Includes requirements for performance rating of all types by type tests, as well as for material, design, construction, identification and marking.