NBN EN ISO 15996 : 2005 AMD 1 2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Valve requirements
  4.1 General
  4.2 Description
  4.3 Valve outlet geometry
  4.4 Performance requirements of the residual pressure device
      4.4.1 Leakage tightness
      4.4.2 Endurance
      4.4.3 Resistance against reverse over pressure
      4.4.4 Resistance to ignition
5 Type testing
  5.1 General
  5.2 Documents
  5.3 Test valves
  5.4 Residual pressure device performance tests
      5.4.1 General
      5.4.2 Leak tightness tests
      5.4.3 Cycle life test
      5.4.4 Resistance test against reverse over-pressure
      5.4.5 Oxygen pressure surge test
  5.5 Test report
Annex A (informative) Various examples of residual pressure
                      valve designs
Annex B (informative) Test equipment
  B.1 Tightness test equipment for residual pressure valve
  B.2 Cycle life test equipment for residual pressure valve
Annex C (informative) Conveyance test
Annex D (informative) Integrity under high flow
Bibliography

Provides requirements for residual pressure valves, with or without a non-return function, for gas cylinders and the methods of testing such valves, for type approval.