NEN EN 13953 : 2015

Foreword
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
   3.1 Terms and definitions
   3.2 Abbreviations
4 Operating temperatures
5 Materials
   5.1 General
   5.2 Metallic materials
   5.3 Non-metallic components
   5.4 Lubricants, sealants and adhesives
6 Design
   6.1 General
   6.2 Threads
   6.3 Springs
   6.4 Test requirements
7 Testing and inspection of the design
   7.1 General
   7.2 Hydraulic proof test
   7.3 Start to discharge and discharge capacity test
   7.4 Leak test
   7.5 Test records
   7.6 Design changes
8 Production testing
9 Marking
10 Documentation
Annex A (informative) Terms used with pressure relief valves
Annex B (normative) Special low temperature requirements for
        valves
Annex C (informative) Sizing of pressure relief valves for
        LPG cylinders
Annex D (informative) Production testing
        D.1 General
        D.2 Dimensional inspection
        D.3 Setting and leak testing of pressure relief valves
Bibliography