ISO INTERNATIONAL STANDARD 4433-1 First edition 1997-12-15 Thermoplastics pipes Resistance to liquid chemicals -- Classification Part 1: Immersion test method Tubes en matieres thermoplastiques -- Résistance aux liquides chimiques - Classification-- Partie 1: Methode d'essai d'immersion This material is reproduced from Iso documents under International Organization for Standardization (Iso) Copyright License number IHS/IcC/1996. Not for resale. No part of these ISo documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of ISo (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHS or the Iso Licensor's members. ISO Reference number ISO 4433-1:1997(E) Copyright Ir No reproduction or networking permitted withou Not for Resale ISO 4433-1:1997(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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. International Standard ISO 4433-1 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 3, Plastics pipes and fittings for industrial applications. Together with the other parts (see below), this part of ISO 4433 cancels and replaces IsO 4433:1984, which has been technically revised. ISO 4433 consists of the following parts, under the general title Thermo- plastics pipes Resistance to chemical fluids -Classification: Part 1:Immersiontestmethod Part 2: Polyolefin pipes Part 3: Unplasticized poly(vinyl chloride) (PvC-U), high-impact poly(vinyl chloride) (PVC-Hl) and chlorinated poly(vinyl chloride) (PVC-C) pipes Part4:Poly(vinylidene fluoride) (PVDF)pipes Annexes A to C of this part of ISO 4433 are for information only. CISO1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm,without permission in writing from the publisher. InternationalOrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Intemet [email protected] X.400 c=ch;a=400net;p=iso;0=isocs;s=central Printed in Switzerland Not for Resale @ ISO ISO4433-1:1997(E) Introduction required to convey or be in contact with materials such as chemical products, fuels, lubricants, and sometimes their vapours Under the action of a liquid, the wall of a thermoplastics pipe can be the locationforseveralconcurrentphenomena;ontheonehand,absorptionof liquidand/orextractionofitssolubleconstituentsfromthepipewallsinto the liquid; on the other hand, a chemical reaction usually involving a significant change in the properties of the pipe. The phenomena aiso differ according to the external and internal stresses affecting the pipes conveying the products (e.g. temperature, pressure, wall thickness). By stresses are meant those forces caused by internal or external factors such as temperature, variation of temperature, inside pressure, bending, internal stresses. Internal stresses couid be caused, for instance, by fast quenching of thick-walled pipes. preliminary determination of the chemical resistance of thermoplastics pipes by means of simple, straightforward tests. The purpose of this Internation