ISO/PRF TS 23818-3

TECHNICAL ISO/TS
SPECIFICATION 23818-3
First edition
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)
PROOF/ÉPREUVE
Reference number
ISO/TS 23818-3:2021(E)
ISO 2021
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ISO/TS 23818-3:2021(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 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 (informative) 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

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

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 systems of distinctive

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

ISO/TS 23818-2 , Assessment of conformity of plastics piping systems for the rehabilitation of existing

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.

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

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 part

of ISO/TS 23818 details the applicable characteristics to be assessed as well as the frequency and

A typical scheme for the assessment of conformity of PVC-U pipes, fittings, joints or assemblies by

A typical scheme for the assessment of conformity of PVC-U pipes, fittings, joints or assemblies by

Figure 3 — Typical scheme for the assessment of conformity by a manufacturer, including

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

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

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 1628-2, Plastics — Determination of the viscosity of polymers in dilute solution using capillary

ISO 4435:2003, Plastics piping systems for non-pressure underground drainage and sewerage —

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

ISO 11296-3:2018, Plastics piping systems for renovation of underground non-pressure drainage and

ISO 11296-7:2019, Plastics piping systems for renovation of underground non-pressure drainage and

EN 1401-1, Plastics piping systems for non-pressure underground drainage and sewerage – Unplasticized

poly(vinyl chloride) (PVC-U) – Part 1: Specifications for pipes, fittings and the system

For the purposes of this document, the terms and definitions given in ISO 11296-3, ISO 11296-7 and the

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 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 of the

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

(3.1.6), batch release test (3.1.7), process verification test (3.1.8), audit test (3.1.10), and witness test (3.1.12), as

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 (3.1.21) or assembly (3.1.22) is capable

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

assembly provided that the process verification tests (3.1.8) are performed regularly.

Note 1 to entry: The batch release test shall be satisfactorily completed before the batch can be released.

Note 2 to entry: A batch can either be a material batch (3.1.14) or a product batch (3.1.16).

test performed by or on behalf of the manufacturer on PVC-U products at specific intervals to confirm

that the process continues to be capable of producing products which conform to the requirements

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 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

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

characteristic, having previously verified its correlation with the specified test

test accepted by an inspection body (3.1.2) or a certification body (3.1.1) for type testing (3.1.6) and/

or audit test (3.1.10), which is carried out by or on behalf of the manufacturer and supervised by a

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-

clearly identified quantity of a given homogeneous compound manufactured under uniform conditions

pipe, fitting, or valve of a clearly identified type intended to be a part of a piping system which the

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

Note 1 to entry: The production batch is defined and identified by the product manufacturer.

one or more products drawn from the same production batch or lot (3.1.17), selected at random without

collection of similar products from which samples (3.1.18) 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 integral part of a finished product (e.g. in a valve).

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

construction of a new pipeline, on or off the line of an existing pipeline, where the function of the new

property, dimension or other feature of a material (3.1.13) or component (3.1.20)

stage as manufactured, i.e. before any subsequent site processing of components (3.1.20) associated

stage as installed, i.e. in final configuration after any site processing of components (3.1.20) associated

numerical designation of the size of a component (3.1.20), which is a convenient round number

To avoid misunderstanding, the assessment of conformity abbreviated terms in this clause are defined

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

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

PVT process verification test essai de vérification du procédé de fabrication Prozessüberprüfung

PVT-I process verification test essai de vérification du procédé d’installation Einbauprozessprüfung

Materials, products, joints and assemblies shall conform to the requirements given in applicable parts

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 a similar

The production of representative “I” stage samples for type testing shall conform to the requirements

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

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

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

material, production or installation method, other than routine in-process adjustments, and whenever

Type tests to be carried out when there is a change of the production site, depend on the extent of the

change, and should therefore be defined individually by the manufacturer and certification body.

Other change conditions characteristics to be type tested and sampling procedures are specified in:

— A.1, TT for products applied to underground non-pressure drainage and sewerage.

The following abbreviated terms are used to identify change conditions requiring new type testing in

Characteristics to be batch release tested and sampling procedures are specified in:

— A.2, BRT for products applied to underground non-pressure drainage and sewerage.

Process verification tests include tests conducted at the “M” stage (PVT) and, where applicable, tests

If a sample or process parameter does not conform to the requirements of the installation process

given in applicable parts of ISO 11296 or ISO 4435, the relevant retest procedure detailed in the

NOTE Failure to meet the required installation process parameters does not necessarily preclude successful

Characteristics to be process verification tested and sampling procedures are specified in:

— A.3, PVT and PVT-I for products applied to underground non-pressure drainage and sewer networks

— A.4, AT for products applied to underground non-pressure drainage and sewer networks

Generally, testing shall be performed using the test methods specified in the relevant parts of ISO 11296.

Indirect testing may be used for BRT characteristics as given in Table A.3 and Table A.4. Indirect testing

The indirect test method used and the correlation or safe relationship of the indirect testing to the

specified testing shall be documented in the manufacturer’s quality plan. The continuing validity of the

If certification is involved, the IT shall be undertaken in a manner that is acceptable to the

Unless otherwise specified, all records shall be maintained for a minimum of ten years in accordance

Samples at “I” stage may be taken from either actual or simulated installations. The method of sampling