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WIS 4-32-08 Issue 4 Specification for the fusion jointing of polyethylene pressure pipeline systems using pe80 and pe100 materials

This document specifies the equipment and procedures for fusion jointing of polyethylene (PE) pipes and fittings. It covers the following pipe constructions commonly found in the UK:

  • Single wall PE pipes (either PE80 or PE100) identifiable as being made from a single material in either light blue, dark blue or black through the full pipe wall.
  • PE pipes with co-extruded layers where the pipe may comprise two or more layers of compatible PE materials, usually 2 layers with a black inner and a coloured thin outer layer.
  • PE pipes with a removable outer layer that has to be peeled from the pipe before it is butt or electrofusion jointed.
  • PE pipes with an aluminium barrier layer conforming to WIS 4-32-19, Type-A style, where the manufacturer permits butt fusion and/or electrofusion jointing of the system.

NOTE: PE80 in this context refers to pipes and fittings made from resin with a density in the range 930 kg/m3 to 940 kg/m3. No other pipes classed as PE80 are covered by this specification.


One or more ‘Common Editorial Caveats’ apply – see ‘WIS & IGN Library / Navigation & Caveats’ for details.

On 5 November 2021 the WUK Standards Board accepted an offer by the British Plastics Federation Pipes Group to lead a review group drafting an amendment that would recognise an improvement in test configuration for the peel decohesion test which had been found to produce reliable test data.

After 3-months public consultation of the resulting draft Amendment 1 to WIS 4-32-08 Issue 4 was published on 28/8/23.

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