ISO/PRF TS 23818-2

Assessment of conformity of plastics piping systems for the rehabilitation of existing pipelines

Évaluation de la conformité des systèmes de canalisations en plastique destinés à la réhabilitation des réseaux existants

General Information

• Status: 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/WG 6 - Assessment of conformity of plastics piping systems used for rehabilitation

Standards Content (sample)

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
---------------------- Page: 1 ----------------------
ISO/TS 23818-2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/TS 23818-2:2021(E)
Contents Page

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 2021 – All rights reserved PROOF/ÉPREUVE iii
---------------------- Page: 3 ----------------------
ISO/TS 23818-2:2021(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, fittings and valves for

the transport of fluids, Subcommittee SC 8, Rehabilitation of pipeline systems.

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.
A list of all parts in the ISO 23818 series can be found on the ISO website.
iv PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/TS 23818-2:2021(E)
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 lining systems of distinct

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;

— 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

pipelines — Part 3: Unplasticized poly(vinyl chloride) (PVC-U) material.

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

© ISO 2021 – All rights reserved PROOF/ÉPREUVE v
---------------------- Page: 5 ----------------------
ISO/TS 23818-2:2021(E)
Table 1 — Structure of Technical Specifications for assessment of conformity
Application
Non-pres- Drainage
sure and
Technical
Water
Material Technique
drainage sewerage Gas supply
Specification
supply
and networks networks
networks
sewerage under
networks pressure
LINING WITH CON- ISO 11296-2 ISO 11297-2 ISO 11298- ISO 11299-2
TINUOUS PIPES, 2
ISO 11296-3 ISO 11297-3 ISO 11299-3
CLOSE-FIT PIPES AND
ISO 11298-
SPIRALLY WOUND ISO 11296-7 ISO 21225-1 ISO 21225-1
PIPES
ISO 21225-1 ISO 21225-2 ISO 21225-2
ISO 21225-1
ISO/TS 23818-1 PE
TRENCHLESS RE-
ISO 21225-2
PLACEMENT USING
ISO 21225-2
PIPE BURSTING, PIPE
EXTRACTION, HORI-
ZONTAL DRILLING
AND IMPACT MOLING
LINING WITH CURED- ISO 11296-4 ISO 11297-4 ISO 11298-
ISO/TS 23818-2 RFC
IN-PLACE PIPES (CIPP) 4
LINING WITH CLOSE- ISO 11296-3
ISO/TS 23818-3 PVC-U FIT PIPES AND SPI-
ISO 11296-7
RALLY WOUND PIPES

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)

respectively.
The format is schematically represented in Figure 1.

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

vi PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/TS 23818-2:2021(E)

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

frequency and sampling of testing.

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

manufacturers and/or installers, including certification, is given in Figure 2.

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

certification
© ISO 2021 – All rights reserved PROOF/ÉPREUVE vii
---------------------- Page: 7 ----------------------
TECHNICAL SPECIFICATION ISO/TS 23818-2:2021(E)
Assessment of conformity of plastics piping systems for the
rehabilitation of existing pipelines —
Part 2:
Resin-fibre composite (RFC) material
1 Scope

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

system and for the establishment of certification procedures.

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

defined in ISO 11295, which do not rely on adhesion to the existing pipeline.

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

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

sewerage networks — Part 1: General

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

sewerage networks — Part 4: Lining with cured-in-place pipes

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

under pressure — Part 4: Lining with cured-in-place pipes

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

Lining with cured-in-place pipes
3 Terms and definitions

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

ISO 11297-4, ISO 11298-4 and the following 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/
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 1
---------------------- Page: 8 ----------------------
ISO/TS 23818-2:2021(E)
3.1 Terms related to assessment of conformity
3.1.1
certification body

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

management

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

ISO/IEC 17065.
3.1.2
inspection body
body that performs inspection

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

ISO/IEC 17021-1.
[SOURCE: ISO/IEC 17020:2012, 3.5, modified — Note 2 to entry added.]
3.1.3
testing laboratory

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

performance of materials (3.1.13) and products

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

test (3.1.20), audit test (3.1.9), and witness test (3.1.11), as applicable.

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

3.1.4
quality management system
part of a management system with regard to quality

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

[SOURCE: ISO 9000:2015, 3.5.4, modified — Note 1 to entry added.]
3.1.5
quality plan

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

particular product or range of products
3.1.6
type testing

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

conforming to the requirements given in the relevant standard

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

assembly provided that the process verification tests are done regularly.
3.1.7
batch release test
BRT

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

satisfactorily completed before the batch can be released

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

2 PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 9 ----------------------
ISO/TS 23818-2:2021(E)

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

3.1.8
process verification test at the “I” stage
PVT-I

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

standard

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

process control.
3.1.9
audit test

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)

3.1.10
indirect test

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

3.1.11
witness 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

the inspection or certification body (3.1.1), competent in testing
3.1.12
reduced long-term test
RLTT

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

[SOURCE: CEN/TS 14632:2012, 3.17, modified]
3.1.13
material

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

stainless steel, brass or EPDM

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

group on Product Testing Procedures (EC, DG ENT and IND, SG PTP).
3.1.14
sample

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

to their quality
Note 1 to entry: The number of products in the sample is the sample size.
3.1.15
group

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

© ISO 2021 – All rights reserved PROOF/ÉPREUVE 3
---------------------- Page: 10 ----------------------
ISO/TS 23818-2:2021(E)
3.1.16
component

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

product or as a spare part.

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).

3.1.17
joint
connection between two products
3.1.18
product type
generic description of a product

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

3.1.19
lining tube batch

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.

3.1.20
CIPP product verification test
CPVT

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)

3.2 Terms related to general rehabilitation
3.2.1
rehabilitation

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

repair and replacement
3.2.2
renovation

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

performance is improved
3.2.3
lining pipe
pipe inserted for renovation (3.2.2) purposes
Note 1 to entry: For CIPP, the lining tube fulfils the function of lining pipe
3.2.4
liner
lining pipe (3.2.3) after installation
3.2.5
lining system

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

renovation (3.2.2)
3.2.6
characteristic

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

4 PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 11 ----------------------
ISO/TS 23818-2:2021(E)
3.2.7
declared value

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

becomes the requirement for the purposes of assessment of conformity
3.2.8
simulated installation

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

installation
3.2.9
simulated host pipeline

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

an operational network
3.2.10
"M" stage

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

the particular renovation (3.2.2) technique
3.2.11
"I" stage

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

with the particular renovation (3.2.2) technique
3.2.12
nominal size

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

approximately equal to the inside or outside diameter in millimetres
3.2.13
nominal outside diameter

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

4 Abbreviated terms

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

languages, English, French and German.
English French German
AT audit test essai d’audit Überwachungsprüfung

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

fabrication

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

IT indirect test essai indirect indirekte Prüfung

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

ing installation d’installation
RLTT reduced long-term test essai à long-terme écourté verkürzte Langzeitprüfung
TT type testing essai de type Typprüfung
WT witness test essai témoin Prüfung unter Aufsicht
Furthermore, the abbreviated terms given in ISO 1043-1 and the following apply:
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 5
---------------------- Page: 12 ----------------------
ISO/TS 23818-2:2021(E)
CIPP cured-in-place pipe
PE polyethylene
RFC resin fibre composite
PVC-U unplasticized poly(vinyl chloride)
5 General

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

ISO 11297 or ISO 11298, as applicable.

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

product standards.

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

which includes a quality plan.

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

system.

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

8.8 and 9.4.

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

6 Testing and inspection
6.1 Grouping
6.1.1 General

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

6.1.2 Size and wall strength groups
6.1.2.1 Non-pressure applications
Three size groups are defined for pipes and fittings, as given in Table 2.

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

ring stiffness from the range offered within that size group.

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

such variation.
Table 2 — Size groups for non-pressure applications
Size group Nominal outside diameter
1 d ≤ 300
6 PROOF/ÉPREUVE © ISO 2021 – All rights reserved
---------------------- Page: 13 ----------------------
ISO/TS 23818-2:2021(E)
Table 2 (continued)
Size group Nominal outside diameter
2 300 < d ≤ 1 200
3 d > 1 200
6.1.2.2 Pressure applications
Size groups are substituted by the wall strength groups given in Table 3.
Table 3 — Wall strength groups
Initial circumferential tensile wall strength group Wall strength
1 ≤ 500 N/mm
> 500 N/mm,
≤ 1 000 N/mm
3 > 1 000 N/mm

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

representative for the group.

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.

6.1.3 Fitting groups
6.1.3.1 Non-pressure applications
Two groups of fittings are defined as given in Table 4.
Table 4 — Fitting groups non-pressure applications
Non-pressure fitting group Type of fitting
1 Lateral connection collar
2 External saddle
6.1.3.2 Pressure applications
One group of fittings is defined as given in Table 5.
Table 5 — Fitting groups pressure applications
Pressure fitting group Type of fitting
1 Flange adapters
6.2 Type testing

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:

© ISO 2021 – All rights reserved PROOF/ÉPREUVE 7
---------------------- Page: 14 ----------------------
ISO/TS 23818-2:2021(E)

— 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

under pressure;

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

Table A.1 and Table B.1:
N : new system;
D : change in design;
M : change of material;
E : extension of the product range.
The detailed specifications of these change
...