ISO/FDIS 15875-2
(Main)Plastics piping systems for hot and cold water installations — Crosslinked polyethylene (PE-X) — Part 2: Pipes
Plastics piping systems for hot and cold water installations — Crosslinked polyethylene (PE-X) — Part 2: Pipes
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide — Polyéthylène réticulé (PE-X) — Partie 2: Tubes
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FINAL DRAFT
International
Standard
ISO/TC 138/SC 2
Plastics piping systems for hot
Secretariat: SNV
and cold water installations —
Voting begins on:
Crosslinked polyethylene (PE-X) —
2025-07-28
Part 2:
Voting terminates on:
2025-09-22
Pipes
Systèmes de canalisations en plastique pour les installations
d'eau chaude et froide — Polyéthylène réticulé (PE-X) —
Partie 2: Tubes
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 138/SC 2
Plastics piping systems for hot
Secretariat: SNV
and cold water installations —
Voting begins on:
Crosslinked polyethylene (PE-X) —
Part 2:
Voting terminates on:
Pipes
Systèmes de canalisations en plastique pour les installations
d'eau chaude et froide — Polyéthylène réticulé (PE-X) —
Partie 2: Tubes
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 2
3.1 Terms and definitions .2
3.2 Symbols .4
4 Generic requirements, instructions and explanations. 5
4.1 Designation PE-X .5
4.2 Application classes, design pressures and pipe dimension classes restrictions .5
4.3 Application classes — Responsibility of the purchaser or specifier .5
4.4 Use of the parts of the ISO 15875 series .5
4.5 PE-X pipes provided with a thin barrier layer .5
4.6 Completeness of tests .5
4.7 Test result interchangeability restriction .5
5 Material. 6
5.1 Pipe material .6
5.2 Evaluation of σ -curves .6
LPL
5.3 Reference lines . .7
5.4 Influence on water intended for human consumption .9
5.5 Barrier layer material .9
5.5.1 General .9
5.5.2 Thermal stability of the barrier layer material .9
5.5.3 Thermal stability of the adhesive layer material .9
5.5.4 Thermal stability of the outer layer material .9
6 General characteristics . 10
6.1 Pipe construction .10
6.2 Appearance .10
6.3 Opacity .10
6.4 Oxygen permeability .10
7 Geometrical characteristics . 10
7.1 Pipes without barrier layer(s) - General .10
7.2 Pipes without barrier layer - Dimensions of pipes .11
7.2.1 Outside diameters .11
7.2.2 Wall thicknesses and their tolerances .11
7.3 Pipes with barrier layer — Dimensions of pipes .14
7.3.1 General .14
7.3.2 Option I - Dimensional integration of the barrier layer .14
7.3.3 Option II - Barrier layer on top .14
8 Mechanical characteristics .15
9 Physical and chemical characteristics .16
10 Performance requirements . . 17
11 Marking . . 17
11.1 General requirements .17
11.2 Minimum required marking .17
Annex A (normative) Pipe construction .18
Annex B (normative) Derivation of S values .21
calc,max
Annex C (normative) Proof of the thermal stability of the barrier layer material resp. adhesive
layer material resp. outer layer material — Test procedure .23
iii
Bibliography .26
iv
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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, fittings and valves for the
transport of
...
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ISO/TC 138/SC 2
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Section start: New page, Header distance from edge:
Secretariat: SNV
1.27 cm, Footer distance from edge: 1.27 cm
Date: 2025-04-3007-14 Formatted: Font color: Auto
Formatted: Font color: Auto
Formatted: Font color: Auto
Plastics piping systems for hot and cold water installations —
Crosslinked polyethylene (PE-X) — —
Formatted: Regular, French (Switzerland)
Part 2:
Formatted: Cover Title_A2
Pipes
Formatted
...
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide — Polyéthylène réticulé
(PE-X) —
Partie 2: Tubes
FDIS stage
Formatted: Left
Formatted: HeaderCentered
Formatted: Font: Bold
Formatted: Default Paragraph Font, French
(Switzerland)
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
Formatted: French (Switzerland)
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
Formatted: Default Paragraph Font, French
at the address below or ISO’s member body in the country of the requester.
(Switzerland)
Formatted: French (Switzerland)
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: French (Switzerland)
Email: copyright@iso.org
Formatted: French (Switzerland)
E-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Formatted: zzCopyright address, Adjust space between
Latin and Asian text, Adjust space between Asian text
Published in Switzerland
and numbers
Formatted: FooterPageRomanNumber
ii
Formatted: HeaderCentered, Left
Formatted: Font: Bold, English (United Kingdom)
Formatted: Font: Bold
Contents
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
Foreword . v
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 2
4 Generic requirements, instructions and explanations . 5
5 Material . 6
6 General characteristics . 12
7 Geometrical characteristics . 13
8 Mechanical characteristics . 17
9 Physical and chemical characteristics . 18
10 Performance requirements . 19
11 Marking . 19
Annex A (normative) Pipe construction . 21
Annex B (normative) Derivation of S values . 25
calc,max
Annex C (normative) Proof of the thermal stability of the barrier layer material resp. adhesive
layer material resp. outer layer material — Test procedure . 27
Bibliography . 31
Foreword . v
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions and symbols . 2
3.1 Terms and definitions . 2
3.2 Symbols . 5
4 Generic requirements, instructions and explanations . 5
4.1 Designation PE-X . 5
4.2 Application classes, design pressures and pipe dimension classes restrictions . 6
4.3 Application classes - Responsibility of the purchaser or specifier . 6
4.4 Use of the parts of the system series . 6
4.5 PE-X pipes provided with a thin barrier layer . 6
4.6 Completeness of tests . 6
Formatted: Font: 10 pt
4.7 Test result interchangeability restriction . 6
Formatted: FooterCentered, Left, Space Before: 0 pt,
5 Material . 6 Tab stops: Not at 17.2 cm
5.1 Pipe material . 6
Formatted: Font: 10 pt
5.2 Evaluation of σ -curves . 7
LPL
Formatted: Font: 10 pt
5.3 Reference lines . 7
Formatted: Font: 11 pt
5.4 Influence on water intended for human consumption . 8
5.5 Barrier layer material . 9
Formatted: FooterPageRomanNumber, Left, Space
5.5.1 General . 9
After: 0 pt, Tab stops: Not at 17.2 cm
© ISO 2025 – All rights reserved
iii
Formatted: HeaderCentered
Formatted: Font: Bold
5.5.2 Thermal stability of the barrier layer material . 9
5.5.3 Thermal stability of the adhesive layer material . 9
5.5.4 Thermal stability of the outer layer material . 9
6 General characteristics . 10
6.1 Pipe construction . 10
6.2 Appearance . 10
6.3 Opacity . 10
6.4 Oxygen permeability . 10
7 Geometrical characteristics . 11
7.1 Pipes without barrier layer(s) - General . 11
7.2 Pipes without barrier layer - Dimensions of pipes . 11
7.2.1 Outside diameters . 11
7.2.2 Wall thicknesses and their tolerances . 11
7.3 Pipes with barrier layer - Dimensions of pipes . 14
7.3.1 General . 14
7.3.2 Option I - Dimensional integration of the barrier layer . 14
7.3.3 Option II - Barrier layer on top . 14
8 Mechanical characteristics . 15
9 Physical and chemical characteristics . 16
10 Performance requirements . 17
11 Marking . 17
11.1 General requirements . 17
11.2 Minimum required marking . 17
Annex A (normative) Pipe construction . 19
Annex B (normative) Derivation of S values . 22
calc,max
Annex C (normative) Proof of the thermal stability of the barrier layer material resp. adhesive
layer material resp. outer layer material (test procedure) . 24
Bibliography . 27
Formatted: FooterPageRomanNumber
iv
Formatted: Font: Bold, English (United Kingdom)
Formatted: HeaderCentered, Left
Formatted: Font: Bold
Foreword
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
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 document 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).
Formatted: English (United Kingdom)
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.o
...
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