scope:

This document specifies the requirements for the design and testing of spring loaded pressure relief valves and thermal expansion valves for use in: - static LPG tanks, - LPG tanks on road tankers, rail tankers, tank-containers or demountable tanks. This document does not address production testing. Normative annex B prescribes testing with conditioning at - 40 °C for valves for use under extreme low temperature conditions. The requirements for pressure relief valve accessories such as isolating devices, manifolds and vent pipes are specified in prEN 14071. prEN 14570 identifies the requirements for the pressure relief valve capacities for static tanks. See EN 12252 for road tankers.