NEN EN 1555-3 : 2010 + A1 2012

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
   5.4 Appearance of the joint (factory-made)
   5.5 Electrical characteristics for electrofusion fittings
6 Geometrical characteristics
   6.1 Measurement of dimensions
   6.2 Dimensions of electrofusion socket fittings
        6.2.1 Diameters and lengths of sockets
        6.2.2 Wall thicknesses
        6.2.3 Out-of-roundness of the bore of a fitting (at any
              point)
        6.2.4 Spigots
        6.2.5 Other dimensions
   6.3 Dimensions of electrofusion saddle fittings
   6.4 Dimensions of spigot end fittings
        6.4.1 Diameters and lengths
        6.4.2 Wall thickness of the fusion end
        6.4.3 Wall thickness of the fitting body
        6.4.4 Other dimensions
   6.5 Dimensions of mechanical fittings
        6.5.1 General
        6.5.2 Mechanical fittings with polyethylene spigot ends
        6.5.3 Mechanical fittings with polyethylene electrofusion
              sockets
        6.5.4 Threads
7 Mechanical characteristic
   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
Annex A (informative) Examples of typical terminal connection
        for electrofusion fittings
Bibliography

Defines the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels.