NS EN 730-2 : 1ED 2002

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Design and materials
  4.1 Connections
  4.2 Materials
5 Requirements
  5.1 General
  5.2 Gas tightness
  5.3 Pressure resistance
  5.4 Non-return valve
  5.5 Pressure relief valves
  5.6 Excess flow cut-off valves
  5.7 Flashback resistance
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 Pressure relief valves
  6.8 Excess flow cut-off valve
  6.9 Internal leakage test for cut-off valves
7 Manufacturer's Instructions
8 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

Describes the general requirements and tests for safety devices for fuel gases and oxygen or compressed air which do not incorporates a flame (flashback) arrestor used downstream of manifold, cylinder and (or) pipeline outlet regulators, upstream of blowpipes for welding, cutting and allied processes.