EN 14129:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Operating conditions
5 Materials
6 Design
7 Testing of the design
8 Marking
9 Operating instructions
10 Packaging
Annex A (informative) - Terms used with LPG
        pressure relief valves
Annex B (normative) - Special low temperature
        requirements for valves
Annex C (normative) - Ageing test
Annex D (informative) - Environment checklist
Annex ZA (informative) - Relationship between this European
         Standard and the Essential Requirements of
         EU Directive 97/23/EC
Bibliography

This European Standard specifies the requirements for the design and testing of spring loaded pressure relief valves and thermal expansion valves for use in:- static LPG pressure vessels,NOTEThe pressure vessels can be situated above ground, underground or mounded.- LPG pressure vessels 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, changeover manifolds and vent pipes are specified in EN 14071.EN 14570 identifies the requirements for the pressure relief valve capacities for static pressure vessels.EN 12252 identifies the requirements for the pressure relief valve capacities for road tankers.Valves designed in accordance with this standard are specifically for use in LPG applications. Valves manufactured in accordance with EN ISO 4126 1 may also be used in certain LPG applications.Terms used with LPG pressure relief valves are described graphically in Annex A.