Plastics piping systems for water supply, and for drainage and sewerage under pressure — Polyethylene (PE) — Part 5: Fitness for purpose of the system

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 document. 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 bar[1]; b) an operating temperature of 20 °C as the reference temperature. NOTE 3 For other operating temperatures, guidance is given in ISO 4427‑1: 2019, Annex A. The ISO 4427 series covers a range of maximum allowable operating pressures and gives requirements concerning colours. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

Systèmes de canalisations en plastique destinés à l'alimentation en eau et aux branchements et collecteurs d'assainissement sous pression — Polyéthylène (PE) — Partie 5: Aptitude à l'emploi du système

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Status
Published
Publication Date
05-Aug-2019
Current Stage
6060 - International Standard published
Start Date
06-Aug-2019
Completion Date
06-Aug-2019
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INTERNATIONAL ISO
STANDARD 4427-5
Second edition
2019-08
Plastics piping systems for water
supply, and for drainage and sewerage
under pressure — Polyethylene (PE) —
Part 5:
Fitness for purpose of the system
Systèmes de canalisations en plastique destinés à l'alimentation
en eau et aux branchements et collecteurs d'assainissement sous
pression — Polyéthylène (PE) —
Partie 5: Aptitude à l'emploi du système
Reference number
ISO 4427-5:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 4427-5:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 4427-5:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms, definitions, symbols and abbreviated terms ....................................................................................................... 2

4 Fitness for purpose of pipes and/or fittings assemblies ............................................................................................ 2

4.1 Method of preparation of assemblies for testing ...................................................................................................... 2

4.1.1 General...................................................................................................................................................................................... 2

4.1.2 Grouping ................................................................................................................................................................................. 2

4.1.3 Fitting types ......................................................................................................................................................................... 3

4.1.4 Electrofusion joints (A and B) .............................................................................................................................. 3

4.1.5 Butt fusion joints (C) .................................................................................................................................................... 3

4.1.6 Mechanical joints (D) ................................................................................................................................................... 3

4.1.7 Socket fusion joints (E) .............................................................................................................................................. 3

4.2 Requirements for fitness for purpose of the assemblies .................................................................................... 4

4.2.1 General...................................................................................................................................................................................... 4

4.2.2 Fitness for purpose of the electrofusion assemblies (A and B) ............................................... 4

4.2.3 Fitness for purpose of butt fusion assemblies (C) .............................................................................. 5

4.2.4 Fitness for purpose of the mechanical assemblies (D) ................................................................... 6

4.2.5 Fitness for purpose of socket fusion assemblies (E) ........................................................................ 6

4.3 Conditioning .............................................................................................................................................................................................. 6

4.4 Requirements ........................................................................................................................................................................................... 6

4.5 Retest in case of failure at 80 °C ............................................................................................................................................... 7

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2019 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 4427-5:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fitting and valves for

the transport of fluids, Subcommittee SC 2, Plastics pipes and fittings for water supplies.

This second edition cancels and replaces the first edition (ISO 4427-5:2007), which has been technically

revised.
The main changes compared to the previous edition are:
— Update of the normative references;
— Technical consistency with ISO 4437-5 (see Reference [1] in the Bibliography).
A list of all parts in the ISO 4427 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 4427-5:2019(E)
Introduction

The ISO 4427 series of standards are a set of system standards that specify the requirements for a

piping system and its components when made from polyethylene (PE). The piping system is intended

to be used in buried or above ground applications, 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.

In respect of potential adverse effects on the quality of water intended for human consumption caused

by the products covered by the ISO 4427 series, it does not provide information on the restriction on

the use of products.

NOTE Guidance for assessment of conformity can be found in Reference [2] in the Bibliography .

© ISO 2019 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 4427-5:2019(E)
Plastics piping systems for water supply, and for drainage
and sewerage under pressure — Polyethylene (PE) —
Part 5:
Fitness for purpose of the system
1 Scope

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 document.

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

NOTE 3 For other operating temperatures, guidance is given in ISO 4427-1: 2019, Annex A.

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

concerning colours.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 1167-1:2006, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination

of the resistance to internal pressure — Part 1: General method

ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of

the resistance to internal pressure — Part 2: Preparation of pipe test pieces

ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of

the resistance to internal pressure — Part 4: Preparation of assemblies

ISO 4427-1:2019, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part1: General
5 2
1) 1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
© ISO 2019 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 4427-5:2019(E)

ISO 4427-2:2019, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 2: Pipes

ISO 4427-3:2019, Plastics piping systems for water supply, and for drainage and sewerage under pressure —

Polyethylene (PE) — Part 3: Fittings

ISO 11413:2019, Plastics pipes and fittings — Preparation of test piece assemblies between a polyethylene

(PE) pipe and an electrofusion fitting

ISO 11414:2009, Plastics pipes and fittings — Preparation of polyethylene (PE) pipe/pipe or pipe/fitting

test piece assemblies by butt fusion

ISO 13953, Polyethylene (PE) pipes and fittings — Determination of the tensile strength and failure mode of

test pieces from a butt-fused joint

ISO 13954, Plastics pipes and fittings — Peel decohesion test for polyethylene (PE) electrofusion assemblies

of nominal outside diameter greater than or equal to 90 mm

ISO 13955, Plastics pipes and fittings — Crushing decohesion test for polyethylene (PE) electrofusion

assemblies

ISO 13956, Plastics pipes and fittings — Decohesion test of polyethylene (PE) saddle fusion joints —

Evaluation of ductility of fusion joint interface by tear test

ISO 17885, Plastics piping systems — Mechanical fittings for pressure piping systems — Specifications

3 Terms, definitions, symbols and abbreviated terms

For the purposes of this document, the terms, definitions, symbols and abbreviated terms given in

ISO 4427-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Fitness for purpose of pipes and/or fittings assemblies
4.1 Method of preparation of assemblies for testing
4.1.1 General

The assemblies shall be made by using pipes conforming to ISO 4427-2 and fittings conforming to

ISO 4427-3.

Test pieces for pressure testing shall be closed with pressure-tight, end-load-bearing end caps, plugs, or

flanges which shall
...

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