(a) Safety relief valves shall be so constructed that no shocks detrimental to the valve or pressure vessel are produced when lifting or closing. Safety relief valves shall be designed to open sharply and reach full lift and capacity at the maximum accumulation. Valve closure after popping shall be clean and sharp. Safety relief valves shall operate satisfactorily without wiredrawing and chattering at any stage of operation.
CFR 46-162.018-5-2014 history
2014CFR 46-162.018-5-2014 Shipping. Part162:Engineering equipment. Section162.018–5:Blow-down adjustment and popping tolerance.