NEN EN 14071 : 2015

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Operating conditions
5 Materials
   5.1 General
   5.2 Metallic materials
   5.3 Non-metallic components
   5.4 Lubricants, sealants, and adhesives
   5.5 Certification
6 Design
   6.1 Introduction
   6.2 Pressure relief valve isolating devices
       6.2.1 General
       6.2.2 Actuation
       6.2.3 Indication of closure
       6.2.4 Guiding arrangements
       6.2.5 Check disc security
       6.2.6 Interchangeability
   6.3 Pressure relief valve manifold
       6.3.1 General
       6.3.2 Indication of port closure
       6.3.3 Port closure
   6.4 Vent pipe
       6.4.1 Design
       6.4.2 Materials
       6.4.3 Effect from external conditions
       6.4.4 Protection caps
   6.5 Connections
   6.6 Threads
   6.7 Minimum requirements for springs
7 Testing of the design
   7.1 General
   7.2 Hydraulic proof test
   7.3 Relief valve isolator test
   7.4 Testing of design signal flow of isolating devices
       and manifolds
   7.5 Resistance of isolating device disc assembly
   7.6 Overtorque deformation test
   7.7 Operation test
       7.7.1 General
       7.7.2 System test
8 Production testing of isolating devices and manifolds
9 Marking and labelling
   9.1 PRV isolating device
   9.2 Pressure relief valve manifolds
10 User instructions
Annex A (normative) Dimensions of master test pieces for PRV
         and isolating devices
Annex ZA (informative) Relationship between this European Standard
         and the Essential Requirements of EU Directive 97/23/EC
Bibliography

Defines the design, testing and inspection requirements for pressure relief valve isolating devices, valve manifolds, vent pipes and system assemblies which are, where necessary, used with pressure relief valves for use in static pressure vessels for Liquefied Petroleum Gas (LPG) service.