NEN EN 1555-4 : 2011

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions, symbols and abbreviations
4 Material
   4.1 Compound
   4.2 Material for non-polyethylene parts
        4.2.1 General
        4.2.2 Metal parts
        4.2.3 Elastomers
        4.2.4 Other materials
5 General characteristics
   5.1 Appearance
   5.2 Colour
   5.3 Design
        5.3.1 General
        5.3.2 Valve body
        5.3.3 Operating cap
        5.3.4 Seals
6 Geometrical characteristics
   6.1 General
   6.2 Measurement of dimensions
   6.3 Wall thickness of the PE valve body
   6.4 Dimensions of spigot ends for valves
   6.5 Dimensions of valves with electrofusion sockets
   6.6 Dimensions of the operating cap
7 Mechanical characteristics of assembled valves
   7.1 General
   7.2 Requirements
8 Physical characteristics
   8.1 Conditioning
   8.2 Requirements
9 Performance requirements
10 Marking
   10.1 General
   10.2 Minimum required marking
   10.3 Additional marking
11 Delivery conditions
Bibliography

Defines the characteristics of valves made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels. It also specifies the test parameters for the test methods.