ISO 23711:2022
(Main)Elastomeric seals — Requirements for materials for pipe joint seals used in water and drainage applications — Thermoplastic elastomers
Elastomeric seals — Requirements for materials for pipe joint seals used in water and drainage applications — Thermoplastic elastomers
This document specifies requirements for materials used for moulded seals made of thermoplastic elastomers (TPEs) for joints in: a) thermoplastic piping systems for non-pressure wastewater discharge (intermittent flow at up to 95 °C) inside buildings; b) thermoplastic piping systems for non-pressure underground drainage and sewerage (continuous flow at up to 45 °C and intermittent flow at up to 95 °C); c) thermoplastic rainwater piping systems. General requirements for finished joint seals are also given; any additional requirements for a particular application are specified in the relevant product standards taking into account that the performance of pipe joints is a function of the seal material properties, seal geometry and pipe joint design.
Garnitures d'étanchéité en caoutchouc — Spécification des matériaux pour garnitures d'étanchéité utilisées dans le domaine de l'eau et du drainage — Élastomères thermoplastiques
General Information
Relations
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 23711
Second edition
2022-10
Elastomeric seals — Requirements
for materials for pipe joint seals used
in water and drainage applications —
Thermoplastic elastomers
Garnitures d'étanchéité en caoutchouc — Spécification des matériaux
pour garnitures d'étanchéité utilisées dans le domaine de l'eau et du
drainage — Élastomères thermoplastiques
Reference number
ISO 23711:2022(E)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO 23711:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 23711:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification . 2
5 Finished-seal requirements . 2
5.1 Dimensional tolerances . 2
5.2 Imperfections and defects . 2
5.3 Hardness . 3
5.4 Tensile strength and elongation at break . 3
5.5 Compression set in air. 3
5.5.1 General . 3
5.5.2 Compression set at 23 °C and 70 °C . 3
5.5.3 Low temperature compression set at −10 °C . 3
5.6 Accelerated ageing in air . 3
5.7 Stress relaxation in compression . 3
5.8 Stress fall . 4
5.9 Volume change in water . 5
5.10 Ozone resistance . 5
5.11 Change in volume in oil [for type WH only (see Table 3)] . 6
6 Test pieces and temperature .7
6.1 Preparation of test pieces . 7
6.2 Test temperature . 7
7 Quality assurance . 7
8 Storage . 7
9 Designation . 7
10 Marking and labelling . 8
Annex A (informative) Quality assurance . 9
Annex B (informative) Guidance on storage of seals .10
Bibliography .11
iii
© ISO 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 23711:2022(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 45, Rubber and rubber products,
Subcommittee SC 4, Products (other than hoses).
This second edition cancels and replaces the first edition (ISO 23711:2003), which has been technically
revised.
The main changes are as follows:
— the tensile test has been changed so that it is performed in two directions;
— the ageing has been made more severe;
— a new test on stress fall has been added.
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 2022 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 23711:2022(E)
Elastomeric seals — Requirements for materials for pipe
joint seals used in water and drainage applications —
Thermoplastic elastomers
1 Scope
This document specifies requirements for materials used for moulded seals made of thermoplastic
elastomers (TPEs) for joints in:
a) thermoplastic piping systems for non-pressure wastewater discharge (intermittent flow at up to
95 °C) inside buildings;
b) thermoplastic piping systems for non-pressure underground drainage and sewerage (continuous
flow at up to 45 °C and intermittent flow at up to 95 °C);
c) thermoplastic rainwater piping systems.
General requirements for finished joint seals are also given; any additional requirements for a particular
application are specified in the relevant product standards taking into account that the performance of
pipe joints is a function of the seal material properties, seal geometry and pipe joint design.
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 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48-2, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness between
10 IRHD and 100 IRHD
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 815-1, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At ambient
or elevated temperatures
ISO 815-2, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 2: At low
temperatures
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 3302-1, Rubber — Tolerances for products — Part 1: Dimensional tolerances
ISO 3384-1:2019, Rubber, vulcanized or thermoplastic — Determination of stress relaxation in compression
— Part 1: Testing at constant temperature
ISO 6914:2021, Rubber, vulcanized or thermoplastic — Determination of ageing characteristics by
measurement of stress relaxation in tension
ISO 9691:1992, Rubber — Recommendations for the workmanship of pipe joint rings — Description and
classification of imperfections
1
© ISO 2022 – All rights reserved
---------------------- Page: 5 ----------------------
ISO 23711:2022(E)
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test
methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
thermoplastic elastomer
polymer or blend of polymers that does not require vulcanization or cross-linking during processing,
yet has elastic properties at its service temperature
Note 1 to entry: These properties disappear at processing temperature, so that further processing is possible, but
return when the material is returned to its service temperature.
4 Classification
A nominal hardness of materials shall be specified within the ranges in Table 1.
Table 1 — Hardness classification
Hardness class 50 60 70
Range of hardness, IRHD 46 to 55 56 to 65 66 to 75
5 Finished-seal requirements
5.1 Dimensional tolerances
Tolerances shall be specified from the appropriate classes in ISO 3302-1.
5.2 Imperfections and defects
The seals shall be free of defects or irregularities, which could affect their function. Classification of
imperfections shall be according to ISO 9691 as follows:
— surface imperfections in zones involved in the sealing function as described in ISO 9691:1992, 4.1.1
shall be considered as defects;
— surface imperfections in zones not involved in the sealing function as described in ISO 9691:1992,
4.1.2.1 b) shall not be considered as defects.
Major surface imperfections in zones not involved in the sealing function as described in ISO 9691:1992,
4.1.2.1 a), may be considered as defects. This should be agreed between the interested parties; the
acceptance criteria depend upon the seal type or design.
Internal imperfections as described in ISO 9691:1992, 4.2 may be considered as defects. The
compressive force can be determined in accordance with ISO 7743. The acceptable limiting values of
the compressive force should be agreed between the interested parties; they depend upon the seal type
or design.
2
© ISO 2022 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 23711:2022(E)
5.3 Hardness
When determined by the microtest method specified in ISO 48-2, on samples prepared in accordance
with 6.1, the hardness shall conform to the requirements given in Table 2.
If the dimensions of a seal are appropriate, the normal test method specified in ISO 48-2 may be used,
provided that the microtest method i
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.