Rubber seals -- Joint rings for water supply, drainage and sewerage pipelines -- Specification for materials

ISO 4633:2015 specifies requirements for materials used in vulcanized rubber seals for the following: a) cold drinking-water supplies (up to 50 °C); b) drainage, sewerage, and rainwater systems (continuous flow up to 45 °C and intermittent flow up to 95 °C).

Joints étanches en caoutchouc -- Garnitures de joints de canalisations d'adduction et d'évacuation d'eau (égouts inclus) -- Spécification des matériaux

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Status
Published
Publication Date
02-Jun-2015
Current Stage
9060 - Close of review
Start Date
04-Jun-2020
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INTERNATIONAL ISO
STANDARD 4633
Fourth edition
2015-06-01
Rubber seals — Joint rings for water
supply, drainage and sewerage
pipelines — Specification for materials
Joints étanches en caoutchouc — Garnitures de joints de
canalisations d’adduction et d’évacuation d’eau (égouts inclus) —
Spécification des matériaux
Reference number
ISO 4633:2015(E)
ISO 2015
---------------------- Page: 1 ----------------------
ISO 4633:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All rights reserved. Unless otherwise specified, 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.
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copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 4633:2015(E)
Contents Page

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

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

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

3 Classification ............................................................................................................................................................................................................ 2

4 Requirements .......................................................................................................................................................................................................... 2

4.1 Requirements for materials ......................................................................................................................................................... 2

4.1.1 General...................................................................................................................................................................................... 2

4.1.2 Effect on water quality ................................................................................................................................................ 2

4.1.3 Microbiological deterioration ............................................................................................................................... 2

4.2 Requirements for finished seals ............................................................................................................................................... 3

4.2.1 Dimensional tolerances.............................................................................................................................................. 3

4.2.2 Imperfections and defects ....................................................................................................................................... 3

4.2.3 Hardness ................................................................................................................................................................................. 3

4.2.4 Tensile strength and elongation at break ................................................................................................... 3

4.2.5 Compression set in air ................................................................................................................................................ 3

4.2.6 Accelerated ageing in air ........................................................................................................................................... 4

4.2.7 Stress relaxation in compression ....................................................................................................................... 4

4.2.8 Volume change in water ............................................................................................................................................ 4

4.2.9 Ozone resistance .............................................................................................................................................................. 5

4.2.10 Splices of prevulcanized profile ends ............................................................................................................ 5

4.3 Optional requirements ..................................................................................................................................................................... 5

5 Test pieces and test temperature ........................................................................................................................................................ 6

5.1 Preparation of test pieces .............................................................................................................................................................. 6

5.2 Test temperature ................................................................................................................................................................................... 7

6 Quality assurance ................................................................................................................................................................................................ 7

7 Storage ............................................................................................................................................................................................................................ 7

8 Designation ................................................................................................................................................................................................................ 7

9 Marking and labelling ..................................................................................................................................................................................... 8

Annex A (normative) Determination of splice strength ................................................................................................................... 9

Annex B (informative) Quality assurance.....................................................................................................................................................10

Annex C (informative) Guidance on storage of seals .........................................................................................................................11

Bibliography .............................................................................................................................................................................................................................12

© ISO 2015 – All rights reserved iii
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ISO 4633:2015(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 on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT) see the following URL: Foreword - Supplementary information.

The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee

SC 4, Products (other than hoses).

This fourth edition cancels and replaces the third edition (ISO 4633:2002), which has been

technically revised.
iv © ISO 2015 – All rights reserved
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INTERNATIONAL STANDARD ISO 4633:2015(E)
Rubber seals — Joint rings for water supply, drainage and
sewerage pipelines — Specification for materials

WARNING — Persons using this International Standard should be familiar with normal laboratory

practice. This International Standard does not purport to address all of the safety problems, if

any, associated with its use. It is the responsibility of the user to establish appropriate safety and

health practices and to ensure compliance with any national regulatory conditions.

1 Scope

This International Standard specifies requirements for materials used in vulcanized rubber seals for

the following:
a) cold drinking-water supplies (up to 50 °C);

b) drainage, sewerage, and rainwater systems (continuous flow up to 45 °C and intermittent flow

up to 95 °C).

The different designations of seals specified are defined according to their type, application, and

requirements (see Table 3).

General requirements for finished joint seals are also given; any additional requirements called for by

the 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. This International Standard is intended to be used, where appropriate, with product standards

which specify performance requirements for joints.

This International Standard is applicable to joint seals for all pipeline materials, including iron, steel,

clay, fibre cement, concrete, reinforced concrete, plastics, and glass-reinforced plastics.

It is applicable to elastomeric components of composite or non-composite seals. In the case of composite

seals for materials of hardness ranges from 76 IRHD to 95 IRHD, the requirements for elongation at

break, compression set, and stress relaxation apply only when the material is participating in the sealing

function or in the long term stability of the seal.

Joint seals made with an enclosed void as part of their design are included in the scope of this

International Standard.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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, Rubber, vulcanized or thermoplastic — Determination of hardness (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 2015 – All rights reserved 1
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ISO 4633:2015(E)

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 2285, Rubber, vulcanized or thermoplastic — Determination of tension set under constant elongation,

and of tension set, elongation and creep under constant tensile load
ISO 3302-1, Rubber — Tolerances for products — Part 1: Dimensional tolerances

ISO 3384-1:2011, Rubber, vulcanized or thermoplastic — Determination of stress relaxation in

compression — Part 1: Testing at constant temperature

ISO 3387, Rubber — Determination of crystallization effects by hardness measurements

ISO 6914, 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

ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods

3 Classification

Six classes of material for pipe joint seals are specified in Table 2 and three classes of material in Table 3.

A nominal hardness shall be specified within the ranges in Table 1.
Table 1 — Hardness classification
Hardness range 40 50 60 70 80 90
Range of hardness, IRHD 36 to 45 46 to 55 56 to 65 66 to 75 76 to 85 86 to 95
4 Requirements
4.1 Requirements for materials
4.1.1 General

The materials shall be free of any substances which can have a deleterious effect on the fluid being

conveyed, the life of the sealing ring, the pipe, or the fitting. Elastomeric components of composite seals

not exposed to the contents of the pipeline are not required to meet the requirements of 4.1.2.

4.1.2 Effect on water quality

For cold-water applications, the materials shall not impair the quality of the water under the conditions

of use. The materials shall comply with the national requirements in the country of use.

4.1.3 Microbiological deterioration

The materials shall be resistant to microbiological deterioration if the application so requires. The test

methods and the requirements shall be as specified in national standards.
2 © ISO 2015 – All rights reserved
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ISO 4633:2015(E)
4.2 Requirements for finished seals
4.2.1 Dimensional tolerances
Tolerances shall be specified from the appropriate classes in ISO 3302-1.
4.2.2 Imperfections and defects

The seals shall be free of defects or irregularities which could affect their function. Classification of

imperfections shall be in accordance with 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), could be considered as defects. This shall be agreed upon between the interested parties,

...

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