SMPV rule 18 :- Fixture of safety valves (SRV) in storage vessels for LPG, Profane ammonia etc and certification there of. The SRV are fitted on storage vessels or mounted on vehicles. SMPV- rule 19:- Certificate of periodic Hydro testing of compressed gas vessels under rule 19 of SMPV rules 1981 and results of following tests ; Vessel & fitting details Fire Protection & Fire extinguishers