Definition(s)
Safety Relief Valve
Spring-loaded pressure-relief valve that can be used as either a safety valve or a relief valve depending on the application.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards