ISO/DTS 23818-3

Assessment of conformity of plastics piping systems for the rehabilitation of existing pipelines — Part 3: Unplasticised poly(vinyl chloride) (PVC-U) material

This document provides a scheme for the assessment of conformity of PVC-U products and assemblies for the rehabilitation of existing pipelines, in accordance with ISO 11300-1, and intended to be included in the manufacturer’s quality plan as part of the quality management system and for the establishment of certification procedures. NOTE In order to help the reader, summary tables of overall scheme requirements are provided in Annex C.

Évaluation de la conformité des systèmes de canalisations en plastique destinés à la réhabilitation des réseaux existants — Partie 3: Matériau poly(chlorure de vinyle) non-plastifié (PVC-U)

General Information

• Status: Not Published
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: ISO/TC 138/SC 8 - Rehabilitation of pipeline systems
• Drafting Committee: ISO/TC 138/SC 8 - Rehabilitation of pipeline systems
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 05-Nov-2025
• Completion Date: 05-Nov-2025

Relations

• Consolidates: ISO 7293:2021 - Forestry machinery — Portable chain-saws — Engine performance and fuel consumption
• Effective Date: 23-Mar-2024

Standards Content (Sample)

FINAL DRAFT
Technical
Specification
ISO/TC 138/SC 8
Assessment of conformity of
Secretariat: JISC
plastics piping systems for
Voting begins on:
the rehabilitation of existing
2025-11-05
pipelines —
Voting terminates on:
2026-01-28
Part 3:
Unplasticised poly(vinyl chloride)
(PVC-U) material
Évaluation de la conformité des systèmes de canalisations en
plastique destinés à la réhabilitation des réseaux existants —
Partie 3: Matériau poly(chlorure de vinyle) non-plastifié (PVC-U)
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
Technical
Specification
ISO/TC 138/SC 8
Assessment of conformity of
Secretariat: JISC
plastics piping systems for
Voting begins on:
the rehabilitation of existing
pipelines —
Voting terminates on:
Part 3:
Unplasticised poly(vinyl chloride)
(PVC-U) material
Évaluation de la conformité des systèmes de canalisations en
plastique destinés à la réhabilitation des réseaux existants —
Partie 3: Matériau poly(chlorure de vinyle) non-plastifié (PVC-U)
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Assessment of conformity .2
3.2 Rehabilitation, general .5
4 Abbreviated terms . 6
5 General . 6
6 Testing and inspection . 6
6.1 Grouping .6
6.1.1 General .6
6.1.2 Size groups .6
6.1.3 Fitting groups .7
6.2 Type testing .7
6.3 Batch release tests .7
6.4 Process verification tests .8
6.5 Audit tests .8
6.6 Indirect tests .8
6.7 Test records .8
Annex A (normative) Test procedures for plastics piping systems for the rehabilitation of
networks for underground non-pressure drains and sewers . 9
Annex B (normative) Specification of new system (N), change in design (D), change in material
(M) and extension of the product range (E) . 14
Annex C (informative) Summary tables of scheme requirements .16
Bibliography . 17

iii
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 ISO/TC 138 Plastics pipes, fittings and valves for the transport of fluids,
Subcommittee SC 8, Rehabilitation of pipeline systems, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 155, Plastics piping systems and ducting systems, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO/TS 23818-3:2021), which has been technically
revised.
The main changes are as follows:
— the document has been amended following the merging and renumbering of International Standards
concerning piping systems, referred to in this document;
— in Clause 3, seven definitions have been removed by reference to ISO 11295;
— lining with spirally-wound pipes has been excluded and has been incorporated in ISO/TS 23818-4.
A list of all parts in the ISO/TS 23818 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
Introduction
International Standards dealing with the following applications are either available or in preparation for
pipeline rehabilitation:
— ISO 11300: Piping systems for rehabilitation of underground drains, sewers and water supply networks;
— ISO 11301: Piping systems for rehabilitation of underground gas supply networks.
These International Standards are distinguished from those for conventionally installed plastics piping
systems by the requirement to verify certain characteristics in the as-installed condition, after site
processing. This is in addition to specifying requirements for plastics piping system components as
manufactured.
For the assessment of conformity, five technical specifications for pipe systems of distinctive materials are
applicable:
— ISO/TS 23818-1;
— ISO/TS 23818-2;
— ISO/TS 23818-3 (this document);
— ISO/TS 23818-4.
These technical specifications cover the International Standards concerning piping systems, as presented in
Table 1.
Table 1 — Structure of technical specifications for assessment of conformity
Application
Drains, sewers
Technical
Material Technique
and Gas supply
Specification
water supply networks
networks
Lining with continuous pipes and close fit pipes trenchless
ISO/TS 23818-1 PE replacement using pipe bursting, pipe extraction, horizontal ISO 11300-1 ISO 11301-1
drilling and impact moling
Thermoset com-
ISO/TS 23818-2 Lining with cured-in-place pipes (CIPP) ISO 11300-2 n/a
posite
ISO/TS 23818-3 PVC-U Lining with close-fit pipes ISO 11300-3 n/a
Thermoplastic Lining with spirally wound pipes and rigidly anchored plastic
a
ISO/TS 23818-4 ISO 11300-4 n/a
composite liners (RAPL)
b b b
— PA-U — n/a —
a
In preparation
b
Under development (as ISO/TS 23818-5)
The format of the four technical specifications is in line with technical specifications for assessment of
conformity to other system standards, apart from presenting the detailed requirements for inspection
and testing in two annexes, for non-pressure applications and pressure applications (where applicable),
respectively.
For this document, covering only non-pressure applications, the format is schematically represented in
Figure 1.
v
Figure 1 — Format of the technical specifications for conformity assessment
Figures 2 and 3 are intended to provide general information on the concept of testing and organization
of those tests used for the purpose of the assessment of conformity. For each type of test, i.e. type testing
(TT), batch release test (BRT), process verification test (PVT), and audit test (AT), this document details the
applicable characteristics to be assessed as well as the frequency and sampling of testing.
A typical scheme for the assessment of conformity of PVC-U pipes, fittings, joints or assemblies by
manufacturers is given in Figure 2.
Figure 2 — Typical scheme for the assessment of conformity by a manufacturer
A typical scheme for the assessment of conformity of PVC-U pipes, fittings, joints or assemblies by
manufacturer
...

ISO/DTS 23818-3
ISO/TC 138/SC 8
Secretariat: JISC
ISO/TC 138/SC 8/WG 1
Secretariat: BSI
Date: 2025-08-0610-21
Assessment of conformity of plastics piping systems for the
rehabilitation of existing pipelines - —
Part 3: Unplasticized
Unplasticised poly (vinyl chloride) (PVC-U) material
Évaluation de la conformité des systèmes de canalisations en plastique destinés à la réhabilitation des réseaux
existantes – Partie 3 : Matériau poly(chlorure de vinyle) non-plastifié (PVC-U)existants —

DTS stage
Based on WG 1 N 213
Warning
This document is not an ISO International Standard.
It is distributed for review and comment.
It is subject to change without notice and may not be referred to as an International Standard.
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 supporting documentation.

ISO #####-#:####(X)
Partie 3: Matériau poly(chlorure de vinyle) non-plastifié (PVC-U)
2 © ISO #### – All rights reserved

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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Fax: [phone]
EmailE-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
iii
Contents
Foreword . vi
Introduction . viii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 7
5 General . 7
6 Testing and inspection . 8
Annex A (normative) Test procedures for plastics piping systems for the rehabilitation of
networks for underground non-pressure drains and sewers . 11
Annex B (normative) Specification of new system (N), change in design (D), change in material
(M) and extension of the product range (E) . 17
Annex C (informative) Summary tables of scheme requirements . 19
Bibliography . 21

Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Assessment of conformity . 2
3.2 Rehabilitation, general . 6
4 Abbreviated terms . 6
5 General . 7
6 Testing and inspection . 7
6.1 Grouping . 7
6.1.1 General . 7
6.1.2 Size groups . 7
6.1.3 Fitting groups . 8
6.2 Type testing . 8
6.3 Batch release tests . 8
6.4 Process verification tests . 8
6.5 Audit tests . 9
6.6 Indirect tests . 9
6.7 Test records . 9
Annex A (normative) Test procedures for plastics piping systems for the rehabilitation of
networks for underground non-pressure drains and sewers . 10
Annex B (normative) Specification of new system (N), change in design (D), change in material
(M) and extension of the product range (E) . 16
iv © ISO 2025– All rights reserved
iv
Annex C (informative) Summary tables of scheme requirements . 18
Bibliography . 20

v
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 documentsdocument 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 drawnISO draws attention to the possibility that some of the elementsimplementation of this
document may beinvolve the subjectuse 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. 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.htmlwww.iso.org/iso/foreword.html.
This document was prepared by ISO/TC 138 Plastics pipes, fittings and valves for the transport of fluids,
Subcommittee SC 8, Rehabilitation of pipeline systems, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 155, Plastics piping systems and ducting systems, in
accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO/TS 23818-3:2021), which has been amended
following the merging and renumbering of the system standards, referred to in this standard. technically
revised.
There are no technicalThe main changes compared to are as follows:
— the first edition, apart from 7document has been amended following the merging and renumbering of
International Standards concerning piping systems, referred to in this document;
— in 3, seven definitions which arehave been removed by reference to ISO 11295 ;
— Compared to the first edition, lining with spirally-wound pipes is nowhas been excluded and the respective
content ishas been incorporated in ISO/TS 23818-4.
A list of all parts in the ISO/TS 23818 series can be found on the ISO website.
vi © ISO 2025– All rights reserved
vi
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.
vii
Introduction
System standardsInternational Standards dealing with the following applications are either available or in
preparation for pipeline rehabilitation:
— — ISO 11300: Piping systems for rehabilitation of underground drains, sewers and water supply networks;
— — ISO 11301: Piping systems for rehabilitation of underground gas supply networks.
These system standardsInternational Standards are distinguished from those for conventionally installed
plastics piping systems by the requirement to verify certain characteristics in the as-installed condition, after
site processing. This is in addition to specifying requirements for plastics piping system components as
manufactured.
For the assessment of conformity, five Technical Specificationstechnical specifications for pipe systems of
distinctive materials are applicable:
— ISO/TS 23818-1 (this document), Assessment of conformity of plastics piping systems for the
rehabilitation of existing pipelines — Part 1: Polyethylene (PE) material;
— ISO/TS 23818-2, Assessment of conformity of plastics piping systems for the rehabilitation of existing
pipelines — Part 2: Thermoset composite materials;
— ISO/TS 23818-3, Assessment of conformity of plastics piping systems for the rehabilitation of existing
pipelines — Part 3: Unplasticized poly(vinyl chloride) (PVC-U) material;
— ISO/TS 23818-4, ) Assessment of conformity of plastics piping systems for the rehabilitation of existing
pipelines — Part 4: Thermoplastic composite materials;

— ISO/TS 23818-1;
— ISO/TS 23818-2;
— ISO/TS 23818-3 (this document);
— ISO/TS 23818-4.
These Technical Specificationstechnical specifications cover the system standardsInternational Standards
concerning piping systems, as presented in Table 1.0.

In preparation
viii © ISO 2025– All rights reserved
viii
Table 1 — Structure of Technical Specifications for assessment of conformity
Table 1 — Structure of technical specifications for assessment of conformity
Application
Drains, sewers
Technical
Material Technique
and Gas supply
Specification
water supply networks
network
...