NEN EN ISO 22435 : 2007 AMD 1 2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and terminology
5 Design requirements
  5.1 General
  5.2 Description
  5.3 Materials
  5.4 Pressure indicators
  5.5 Filling connection
  5.6 Cylinder connection
  5.7 Outlet connection
  5.8 Outlet pressure for acetylene
  5.9 Flow control valve (flow controller)
  5.10 Pressure adjusting device
  5.11 Filtration
  5.12 Main shut-off valve
  5.13 Flow and pressure performance for regulators without
       flow metering devices
  5.14 Pressure relief valve
  5.15 Leakage
  5.16 Mechanical strength
  5.17 Resistance to ignition
  5.18 Requirement for VIPR with flow metering devices
  5.19 Constructional requirements
  5.20 Valve operating device
6 Test methods
  6.1 General
  6.2 Documentation
  6.3 Number of test samples
  6.4 Test sequence
  6.5 Test method for mechanical strength
  6.6 Test methods for flow and pressure performance for
       regulators without flow metering devices
  6.7 Test method for relief valve
  6.8 Pressure retention of the low-pressure side of the
       pressure regulator
  6.9 Test method for flowmeter mechanical strength
  6.10 Test method for accuracy of VIPR with flowmeter
  6.11 Test method for accuracy of VIPR with flowmeter and
       with fixed orifices
  6.12 Test methods for leakage
  6.13 Test method for operating and loosening torques
  6.14 Test method for endurance of the main shut-off
       mechanism
  6.15 Test method for endurance of the non-return valve
  6.16 Test method for ignition
  6.17 Test method for resistance to acetylene decomposition
  6.18 Test method for flame resistance of the valve operating
       device
7 Marking
8 Instructions
Annex A (normative) - Valve impact test
Annex B (informative) - Endurance test
Bibliography

Applies to cylinder valves with integrated pressure regulators (VIPR) intended to be fitted to gas cylinders that convey compressed, liquefied or dissolved gases.