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This document specifies the general aspects of polyethylene (PE) compounds for the manufacture of pressure pipes and fittings (mains and service pipes) for buried or above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.

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

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

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

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

NOTE 1 For other operating temperatures, guidance is given in Annex A.

The ISO 4427- series covers a range of maximum allowable operating pressures and gives requirements concerning colours and additives.

NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.

This document specifies the pipes made from polyethylene (PE) for buried or above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.

NOTE 1 The intended uses include sea outfalls, laid in water and pipes suspended below bridges

For the transport of water intended for human consumption in contaminated soils, special care should be taken.

NOTE 2 ISO 21004 provides alternative solution for use in contaminated soils. See Reference [2] in the Bibliography.

This document specifies three types of pipe:

— PE pipes (outside diameter dn), including any identification stripes;

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

— PE pipes (outside diameter dn) 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 International Standard.

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:

a) a maximum allowable operating pressure (PFA) up to and including 25 bar1);

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

NOTE 3 For other operating temperatures, guidance is given in ISO 4427-1: —, Annex A.

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

NOTE 4 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.

This document specifies the fittings made from polyethylene (PE) for buried or above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.

NOTE 1 The intended uses include sea outfalls, laid in water and connection between pipes suspended below bridges.

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

In conjunction with the other parts of the ISO 4427- series, this document is applicable to PE fittings, to joints with components of PE or other materials, intended to be used under the following conditions:

a) a maximum allowable operating pressure (PFA) up to and including 25 bar1);

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

NOTE 2 For other operating temperatures, guidance is given in ISO 4427-1: —, Annex A.

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

NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.

This document is applicable to fittings of the following types:

1. fusion fittings;

a. electrofusion fittings;

b. spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion);

c. socket fusion fittings (see Annex A);

2. mechanical fittings;

a. compression fittings;

b. flanged fittings;

3. fabricated fittings (see Annex B).

This document specifies the characteristics of the fitness for purpose of pipes and/or fittings assemblies made from polyethylene (PE) for buried or above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.

NOTE 1 The intended uses include sea outfalls, laid in water and pipes suspended below bridges

NOTE 2 This document is intended to be only used by the product manufacturer to assess the performance of components according to ISO 4427-2: — and/or ISO 4427-3: — when joined together under normal and extreme conditions. It is not intended for on-site testing of pipe systems.

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

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

a) a maximum allowable operating pressure (PFA) up to and including 25 bar1);

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

NOTE 3 For other operating temperatures, guidance is given in ISO 4427-1: —, Annex A.

The ISO 4427- series covers a range of maximum allowable operating pressures and gives requirements concerning colours and additives.