ISO/TS 23818-3:2021

TECHNICAL ISO/TS
SPECIFICATION 23818-3
First edition
2021-03
Assessment of conformity of plastics
piping systems for the rehabilitation
of existing pipelines —
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)
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved

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 . 4
4 Abbreviated terms . 5
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 . 6
6.2 Type testing . 7
6.3 Batch release tests . 7
6.4 Process verification tests . 7
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 drainage and sewerage .9
Annex B (normative) Specification of new system (N), change in design (D), change in
material (M) and extension of the product range (E) .15
Annex C (informative) Summary tables of scheme requirements .17
Bibliography .19
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, fittings and valves for
the transport of fluids, Subcommittee SC 8, Rehabilitation of pipeline systems.
A list of all parts in the ISO 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 © ISO 2021 – All rights reserved

Introduction
System standards dealing with the following applications are either available or in preparation for
pipeline rehabilitation:
— ISO 11296, Plastics piping systems for renovation of underground non-pressure drainage and sewerage
networks;
— ISO 11297, Plastics piping systems for renovation of underground drainage and sewerage networks
under pressure;
— ISO 11298, Plastics piping systems for renovation of underground water supply networks;
— ISO 11299, Plastics piping systems for renovation of underground gas supply networks;
— ISO 21225, Plastics piping systems for the trenchless replacement of underground pipeline networks.
These system 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, three Technical Specifications for pipe systems of distinctive
materials are applicable:
ISO/TS 23818-1, Assessment of conformity of plastics piping systems for the rehabilitation of existing
pipelines — Part 1: Polyethylene (PE) material;
1)
ISO/TS 23818-2 , Assessment of conformity of plastics piping systems for the rehabilitation of existing
pipelines — Part 2: Resin-fibre composite (RFC) material;
ISO/TS 23818-3 (this document), Assessment of conformity of plastics piping systems for the rehabilitation
of existing pipelines — Part 3: Unplasticized poly (vinyl chloride) (PVC-U) material.
These three documents cover the system standards, as presented in Table 1.
1) Under preparation. Stage at the time of publication: ISO/DTS 23818-2:2021.
Table 1 — Structure of Technical Specifications for Assessment of Conformity
Application
Non-pressure Drainage and
Technical
drainage sewerage Water sup-
Material Technique
Gas supply
Specification
and networks ply
networks
sewerage under networks
networks pressure
LINING WITH CONTIN- ISO 11296-2 ISO 11297-2 ISO 11298-2 ISO 11299-2
UOUS PIPES, CLOSE-FIT
ISO 11296-3 ISO 11297-3 ISO 11298-3 ISO 11299-3
PIPES AND SPIRALLY
WOUND PIPES
ISO 11296-7
TRENCHLESS RE-
ISO/TS 23818-1 PE
PLACEMENT USING
ISO 21225-1 ISO 21225-1 ISO 21225-1 ISO 21225-1
PIPE BURSTING, PIPE
EXTRACTION, HORI-
ISO 21225-2 ISO 21225-2 ISO 21225-2 ISO 21225-2
ZONTAL DRILLING AND
IMPACT MOLING
LINING WITH CURED-IN- ISO 11296-4 ISO 11297-4 ISO 11298-4
a
ISO/TS 23818-2 RFC
PLACE PIPES (CIPP)
LINING WITH CLOSE-FIT ISO 11296-3
PIPES AND SPIRALLY
ISO/TS 23818-3 PVC-U
WOUND PIPES
ISO 11296-7
a
Under preparation. Stage at the time of publication: ISO/DTS 23818-2:2021.
The format of the three 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.
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.
vi © ISO 2021 – All rights reserved

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
manufacturers, including certification, is given in Figure 3.
Figure 3 — Typical scheme for the assessment of conformity by a manufacturer, including
certification
TECHNICAL SPECIFICATION ISO/TS 23818-3:2021(E)
Assessment of conformity of plastics piping systems for the
rehabilitation of existing pipelines —
Part 3:
Unplasticised poly(vinyl chloride) (PVC-U) material
1 Scope
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 the applicable parts of ISO 11296 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.
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 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 1628-2, Plastics — Determination of the viscosity of polymers in dilute solution using capillary
viscometers — Part 2: Poly(vinyl chloride) resins
ISO 4435:2003, Plastics piping systems for non-pressure underground drainage and sewerage —
Unplasticized poly(vinyl chloride) (PVC-U)
ISO 11296-1, Plastics piping systems for renovation of underground non-pressure drainage and sewerage
networks — Part 1: General
ISO 11296-3:2018, Plastics piping s
...