NEN EN 13175 : 2014

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
6 Design - general requirements
   6.1 General
   6.2 Seats and seals
   6.3 Springs
   6.4 Threads
   6.5 Flanges
7 Design - specific requirements
   7.1 Excess flow valve
   7.2 Non-return valve
   7.3 Shut-off valves
   7.4 Filler valve
   7.5 Occasional liquid withdrawal valve
   7.6 Internal valve
   7.7 Vapour equalising valve
   7.8 Multipurpose valve
   7.9 Breakaway coupling
   7.10 Pressure gauge
   7.11 Temperature gauge
   7.12 Plugs and caps
8 Testing of the design
   8.1 General
   8.2 Over torquing deformation test
   8.3 External leakage test
   8.4 Seat leakage test
   8.5 Residual flow test
   8.6 Endurance test
   8.7 Pressure strength test
   8.8 Excess flow test
        8.8.1 General
        8.8.2 Excess flow test with air
        8.8.3 Excess flow test with water
        8.8.4 Excess flow strength test
   8.9 Weak section strength test
   8.10 Stress cracking test
        8.10.1 General
        8.10.2 Mercurous nitrate immersion test
        8.10.3 Moist ammonia air stress cracking test
   8.11 Vacuum test
   8.12 Flow resistance test
   8.13 Test report
9 Production testing
10 Marking
11 Documentation
Annex A (normative) ACME connections
Annex B (normative) Special low temperature requirements for
        valves
Annex C (normative) Production testing and inspection
Annex ZA (informative) Clauses of this European Standard
         addressing essential requirements or other
         provisions of EU Directives
Bibliography

Defines minimum requirements for the design, testing and production testing of valves, including appropriate fittings, which are connected to mobile or static LPG pressure vessels above 150 l water capacity.