ISO/PRF TS 23818-2

TECHNICAL ISO/TS
SPECIFICATION 23818-2
First edition
Assessment of conformity of plastics
piping systems for the rehabilitation
of existing pipelines —
Part 2:
Resin-fibre composite (RFC) material
Évaluation de la conformité des systèmes de canalisations en
plastique destinés à la réhabilitation des réseaux existants —
Partie 2: Matériau composite résine-fibres (RFC)
PROOF/ÉPREUVE
Reference number
ISO/TS 23818-2:2021(E)
ISO 2021
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ISO/TS 23818-2:2021(E)
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© ISO 2021

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

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

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

3.1 Terms related to assessment of conformity ................................................................................................................... 2

3.2 Terms related to general rehabilitation ............................................................................................................................. 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 and wall strength groups .............................................................................................................................. 6

6.1.3 Fitting groups ..................................................................................................................................................................... 7

6.2 Type testing ............................................................................................................................................................................................... 7

6.3 Batch release tests ............................................................................................................................................................................... 8

6.4 Process verification tests during installation ............................................................................................................... 8

6.5 CIPP product verification tests.................................................................................................................................................. 8

6.6 Audit tests ................................................................................................................................................................................................... 8

6.7 Indirect tests ............................................................................................................................................................................................. 9

6.8 Test records................................................................................................................................................................................................ 9

Annex A (normative) Test procedures for plastics piping systems for the rehabilitation of

networks for underground non-pressure drainage and sewerage ...............................................................10

Annex B (normative) Test procedures for plastics piping systems for the rehabilitation of

networks for water supply and for drainage and sewerage under pressure .....................................18

Annex C (normative) Specification of new system (N), change in design (D), change in

material (M) and extension of the product range (E) .................................................................................................21

Annex D (informative) Parameters and criteria for reduced long-term tests (RLTT) ....................................23

Annex E (informative) Summary tables of scheme requirements ......................................................................................25

Bibliography .............................................................................................................................................................................................................................27

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

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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

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

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/

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

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

System standards dealing with the following applications are either available or in preparation for

— ISO 11296, Plastics piping systems for renovation of underground non-pressure drainage and sewerage

— ISO 11297, Plastics piping systems for renovation of underground drainage and sewerage networks

— 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

For the assessment of conformity, three Technical Specifications for pipe lining systems of distinct

— ISO/TS 23818-1, Assessment of conformity of plastics piping systems for the rehabilitation of existing

— ISO/TS 23818-2 (this document), Assessment of conformity of plastics piping systems for the

rehabilitation of existing pipelines — Part 2: Resin-fibre composite (RFC) material;

— ISO/TS 23818-3, Assessment of conformity of plastics piping systems for the rehabilitation of existing

These three Technical Specifications cover the system standards, as presented in Table 1.

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 requirement for Inspection

and Testing in two annexes, for non-pressure applications and pressure applications (where applicable)

Figure 1 — Format of the Technical Specifications for the assessment of conformity

Figure 2 is 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-I), CIPP product verification test (CPVT)

and audit test (AT), this document details the applicable characteristics to be assessed as well as the

A typical scheme for the assessment of conformity of RFC pipes, fittings, joints or assemblies by

Figure 2 — Typical scheme for the assessment of conformity by a manufacturer, including

This document provides a scheme for the assessment of conformity of RFC products for the rehabilitation

of existing pipelines, in accordance with the applicable parts of ISO 11296, ISO 11297, and ISO 11298,

and intended to be included in the manufacturer’s quality plan as part of the quality management

It applies to cured-in-place pipe (CIPP) products only. It applies to non-pressure pipe liners, and to

independent (fully structural, class A) and interactive (semi structural, class B) pressure pipe liners, as

In order to help the reader, summary tables of overall scheme requirements are provided in Annex E.

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

ISO 11296-1:2018, Plastics piping systems for renovation of underground non-pressure drainage and

ISO 11296-4: 2018, Plastics piping systems for renovation of underground non-pressure drainage and

ISO 11296-4:2018+Amd1: 2021, Plastics piping systems for renovation of underground non-pressure

drainage and sewerage networks — Part 4: Lining with cured-in-place pipes — Amendment 1: Updated

definitions, marking requirements and procedure for alternative expression of flexural test results

ISO 11297-4:2018, Plastics piping systems for renovation of underground drainage and sewerage networks

ISO 11298-4:2021, Plastics piping systems for renovation of underground water supply networks — Part 4:

For the purposes of this document, the terms and definitions given in ISO 11296-4:2018+Amd1: 2021,

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

impartial body, governmental or non-governmental, possessing the necessary competence and

responsibility to carry out certification of conformity according to given rules of procedure and

Note 1 to entry: A certification body should preferably operate in accordance with ISO/IEC 17021-1 or

Note 1 to entry: An inspection body can be an organization, or part of an organization.

Note 2 to entry: An inspection body should preferably operate in accordance with ISO/IEC 17020 or

laboratory which measures, tests, calibrates or otherwise determines the characteristics (3.2.6) of the

Note 1 to entry: In the context of this document, the materials (3.1.13) and products can be subjected to type

testing (3.1.6), batch release test (3.1.7), process verification test at the “I” stage (3.1.8), CIPP product verification

Note 2 to entry: A testing laboratory should preferably operate in accordance with ISO/IEC 17025.

Note 1 to entry: Requirements for quality management systems are given in ISO 9001.

document setting out the specific quality practices, resources and sequence of activities relevant to a

testing performed to prove that the material (3.1.13), pipe, joint (3.1.17) or assembly is capable of

Note 1 to entry: The type test results remain valid until there is a change in the material (3.1.13) or product or

test performed by or on behalf of the manufacturer on a batch of RFC products, which has to be

Note 1 to entry: For CIPP, BRT is applicable to a lining tube batch (3.1.19) only.

[SOURCE: ISO/TS 23818-1:2020, 3.1.7, modified — "PE" changed to "RFC" and Note 1 to entry added.]

test performed by or on behalf of the manufacturer or installer at specific intervals during the

installation process to confirm that the process as specified in the installation manual continues to

be capable of producing installed products which conform to the requirements given in the relevant

Note 1 to entry: Such tests are not required to release batches of products and are carried out as a measure of

test performed by a test laboratory on behalf of an inspection body (3.1.2) or certification body (3.1.1) to

confirm that the product continues to conform to the requirements given in the relevant standard and

to provide information to assess the effectiveness of the quality management system (3.1.4)

test performed by or on behalf of the manufacturer, different from that specified test for that particular

characteristic (3.2.6), having previously verified its correlation with the specified test

test accepted by an inspection or a certification body (3.1.1) for type testing (3.1.6) and/or audit test

(3.1.9), which is carried out by or on behalf of the manufacturer and supervised by a representative of

test using shorter time periods or fewer test pieces than those specified for a full long-term test

generic term for compositions grouped by families, expressed by generic names, e.g. polypropylene,

Note 1 to entry: Definition from European Commission, Directorate-General for Enterprise and Industry, Sub-

one or more products drawn from the same production batch or lot, selected at random without regard

collection of similar products from which samples (3.1.14) are selected for testing purposes

product manufactured out of a specific composition compound brought to the market as part of another

Note 1 to entry: For drinking water application, components may be considered as products and be individually

approved (e.g. O-ring, gasket) or they are tested as an integral part of a finished product (e.g. in a valve).

EXAMPLE A pipe or fitting or valve or their main parts, of the same design, from a particular compound.

clearly identified collection of lining tubes, manufactured consecutively or continuously under the same

conditions, using the same material (3.1.13) conforming to the same specification

Note 1 to entry: The batch is defined and identified by the lining tube manufacturer.

test performed by or on behalf of the manufacturer or installer at the “I” stage (3.2.11) to verify that the

“I” stage characteristics (3.2.6) of the CIPP product conform with the respective declared values (3.2.7)

measures for restoring or upgrading the performance of existing systems, including renovation (3.2.2),

work incorporating all or part of the original fabric of the pipeline, by means of which its current

lining pipe (3.2.3) and all relevant fittings for insertion into an existing pipeline for the purposes of

property, dimension or other feature of a material (3.1.13) or component (3.1.16)

limiting value of a characteristic (3.2.6) declared in advance by the lining system (3.2.5) supplier, which

installation of a lining system (3.2.5) into a simulated host pipeline (3.2.9), using representative

equipment and processes, to provide samples (3.1.14) for testing which are representative of an actual

section of pipeline, which is not part of an operational network, but which replicates the environment of

stage as manufactured, before any subsequent site processing of components (3.1.16) associated with

stage as installed, i.e. in final configuration after any site processing of components (3.1.16) associated

numerical designation of the size of a component (3.1.16), which is a convenient round number

specified outside diameter, in millimetres, assigned to a nominal size (3.2.12) DN/OD

To prevent misunderstanding, the abbreviated terms relating to assessment of conformity in this

clause are defined as being the same in each language. For the same reason, the terms are given in three

BRT batch release test essai de libération de campagne de Freigabeprüfung einer Charge

CPVT CIPP product verification test essai de vérification du produit CIPP CIPP-Produktprüfung

PVT-I process verification test dur- essai de vérification du procédé Einbauprozessprüfung

Materials, products, joints and assemblies shall conform to the requirements given in ISO 11296,

Where these product standards include clauses entitled ‘Regional requirements’, in countries of the

single European market, conformity shall be assessed against certain different normative references

(EN equivalents of ISO standards where not yet merged as EN ISO standards), as specified in the

Products and assemblies shall be produced by the manufacturer under a quality management system

It is recommended that the quality management system conforms to ISO 9001 or similar management

The production of representative “I” stage samples for type testing shall conform to ISO 11296-1:2018

For the effect on water quality, attention is drawn to the requirements of National regulations.

For the purposes of this document, the groups specified in 6.1.2 and 6.1.3 apply.

For testing purposes, one individual nominal outside diameter, d , shall be selected from each group.

Within each size group a single ring stiffness shall be selected for testing, as a representative median

NOTE In the case of structured-wall composites which can exhibit a strong variation of apparent flexural

modulus with wall thickness, additional short-term type testing on samples of the same nominal diameter, but

with ring stiffness at both extremes of the range offered within the size group, can help to define the extent of

For testing purposes, a sample with the least nominal wall thickness shall be selected from each

group defined by Table 3. The tensile wall strength, expressed in N/mm, determined in these tests is

NOTE For the determination of other strength and stiffness characteristics of RFC pressure liners, a sample

with the least proportional content of reinforcing fibres oriented in the direction of testing can be applicable.

Relevant type testing shall be carried out on every new system and whenever there is a change in

design, material (resin or filler or carrier material/reinforcement type), installation method, other than

routine in-process adjustments, and whenever there is an extension of the product range.

For each change condition, characteristics to be type tested and sampling procedures are specified in:

— A.1 TT for systems applied to underground non-pressure drainage and sewerage networks;

— B.1 TT for systems applied to water networks and drainage and sewerage networks

The following abbreviations are used to identify change conditions requiring new type testing in the