BS ISO 4427-2:2019 – TC:2020 Edition

1

This document specifies the pipes made from polyethylene (PE) for buried or above ground applications, intended for the conveyance of:

• —

  water for human consumption;

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  raw water prior to treatment;

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  drainage and sewerage under pressure;

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  vacuum sewer systems;

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  water for other purposes.

Pipes complying with this document are not intended for the transport of water intended for human consumption in contaminated soils unless special consideration has been taken.

This document specifies three types of pipe:

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  PE pipes (outside diameter d _n), including any identification stripes;

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  PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter  d _n) where all layers have the same MRS rating;

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  PE pipes (outside diameter d _n) having a peelable and contiguous thermoplastics additional layer on the outside of the pipe (“coated pipe”) .

This document also specifies the test parameters for the test methods referred to in this document.

In conjunction with the other parts of the ISO 4427 series, this document is applicable to PE pipes, their joints and to joints with components made of PE and other materials, intended to be used under the following conditions:

1. a)

   a maximum allowable operating pressure (PFA) up to and including 25 bar ¹

   ¹

   1 bar = 0,1 MPa = 10 ⁵ Pa; 1 MPa = 1 N/mm ².

   ;

2. b)

   an operating temperature of 20  °C as the reference temperature.

This document covers a range of maximum allowable operating pressures and gives requirements concerning colours.

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