Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Design and materials
  4.1 Connection
  4.2 Materials
5 Requirements
  5.1 General
  5.2 Gas tightness
  5.3 Pressure resistance
  5.4 Flame arrestor
  5.5 Flame arrestor with non-return value
  5.6 Flame arrestor with temperature sensitive
       cut-off valve
  5.7 Flame arrestor with pressure-sensitive cut-off
       valve
  5.8 Other multifunctional safety devices
6 Methods for type testing
  6.1 General
  6.2 Accuracy of pressure and flow measurements
  6.3 Test gases
  6.4 Gas tightness test
  6.5 Pressure resistance test
  6.6 Non-return valve test
  6.7 Flame arrestor test
  6.8 Temperature-sensitive cut-off valve test
  6.9 Pressure-sensitive cut-off valve test
  6.10 Internal leakage test for cut-off valves
7 Further tests
8 Manufacturer's instructions
9 Marking
Annex A (informative) Gas flow measurement
      A.1 General
      A.2 Procedure
Annex B (informative) Third party testing information
      B.1 General
      B.2 Samples and documentation
Annex C (informative) Production tests
      C.1 General
      C.2 Production flashback test