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Applicable to test pieces cut from products of cellular materials. Useful for two purposes: a) studying the structure of cellular products in connection with their physical properties and their method of manufacture and b) ensuring product quality (quality assurance). Describes principle, apparatus, test piece and conditions, procedure and calculation and expression of the results. Three figures deliver the details for testing.

This document specifies materials and the general aspects of polyethylene (PE) pressure piping systems (mains and service pipes) for buried or above ground applications, intended for the conveyance of:

water intended for human consumption,

raw water prior to treatment,

drains and sewers under pressure,

vacuum sewer systems,

water for irrigation,

water for other purposes, with the exception of industrial applications.

The intended use includes sea outfalls, laid in water and pipes suspended below bridges.

NOTE 1:

Attention is drawn to Clause 6 of this document for PE components for the conveyance of water intended for human consumption and raw water prior to treatment. Components manufactured for water for other purposes, drains and sewers, and vacuum sewer systems are possibly not suitable for water supply for human consumption.

PE pipe systems for industrial applications and irrigation with limited pressure exposure are not covered by this document.

NOTE 2:

Industrial application is covered by ISO 15494, irrigation with limited pressure exposure is covered by ISO 8779 (Ed3).

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

In conjunction with ISO/DIS 4427-2, ISO/DIS 4427-3 and ISO/DIS 4427-5, 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 (3.3.2) (PFA) up to and including 25 bar;

b) an operating temperature of 20 °C as the reference design temperature (3.3.3).

For applications operating at constant temperatures greater than 20 °C and up to and including 50 °C, see Annex A.

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

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 test procedures for the acquisition and presentation of multipoint data which demonstrate the behaviour of plastics under the following environments:

—   prolonged exposure to heat;

—   liquid chemicals;

—   environmental stress cracking under a constant tensile stress;

—   artificial weathering. The tests are listed in order of increasing severity of the environment. By testing under the least severe environments first, it is possible to make informed judgements regarding whether tests under more severe conditions are worthwhile.

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 document.

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 bar[1];

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

NOTE 2 For other operating temperatures, guidance is given in ISO 4427‑1:2019, Annex A.

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

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 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).

[1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

This document specifies the requirements of fitness for purpose of assembled polyethylene (PE) piping systems intended for the conveyance of water intended for human consumption, raw water prior to treatment, drains and sewers under pressure, vacuum sewer systems, and water for other purposes, with the exception of industrial application.

It specifies the requirements for the following types of joint assemblies with pipes or spigot ends:

(A) electrofusion socket fitting;

(B) electrofusion socket fitting;

(C) butt fusion joint (“pipe to pipe” and “pipe to spigot end fittings”);

(D) mechanical joint;

(E) socket fusion joint.

It specifies the method of preparation of test piece joints and the tests to be carried out on these joints for assessing the fitness for purpose of the system under normal and extreme conditions.

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

This document is intended to be used only by the product manufacturer and test laboratories to assess the performance of components in accordance with ISO 4427-2 and ISO 4427-3 when joined together under normal and extreme conditions in accordance with this document. It is not intended for on-site testing of pipe systems.

In conjunction with ISO 4427-1, ISO 4427-2 and ISO 4427-3, this document is applicable to PE pipes, fittings and valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions:

a) allowable operating pressure, PFA, up to 25 bar;

b) an operating temperature of 20 °C as a reference temperature for design purposes.

For applications operating at constant temperatures greater than 20 °C up to and including 50 °C, see ISO 4427-1, XXXX - Annex A.

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

1 bar = 0,1 MPa. = 105 Pa; 1 MPa = 1 N/mm2