Introduction

This document is the specification for polyethylene pressure pipes for pressurised water supply and sewerage duties.  This second edition incorporates minor revisions to facilitate third party assessment of conformity.

It has been prepared by Pipeline Developments Ltd. under the direction of the UK Water Industry’s Standards Horizontal Group in consultation with the Water Industry and manufacturers. It harmonises the performance requirements previously specified in, and supersedes, WISs 4-32-03, 4-32-09 and 4-32-13. Existing test methods from these WISs have been used wherever possible.

The requirements of the British Standards BS 6572 and BS 6730 are also accommodated as are the requirements of European Standards prEN 12201 and prEN 13244. Note that, it is not intended that this Water Industry Specification should supersede BS 6572 and BS 6730 in purchasing contracts

It should be noted that this document adopts the ISO classification of PE materials. PE100 is now used to describe HPPE grades. PE80 is now used to describe MDPE.

It is intended that an Information and Guidance Note describing the relationship between the properties which are required of PE pipes and the design philosophy currently used by the UK Water Industry will be prepared to complement this Specification. This IGN will be numbered 4-32-18. Clauses in which this document is referenced are shown in italics.

Caveats

This document has not been reviewed for its continued currency since publication.

You should recognise the distinctions between ‘current’ and ‘ageing’ standards to better understand its interpretation.

One or more ‘Common Editorial Caveats’ may apply to this document.

See this site’s webpage ‘WIS & IGN Library / Navigation & Caveats’ for more details.

It is currently only available in a scanned format.