ISO INTERNATIONAL STANDARD 11922-2 First edition 1997-04-15 Thermoplastics pipes for the conveyance of fluids -- Dimensions and tolerances Part 2: Inch-based series Tubes en matieres thermoplastiques pour le transport des fluides- Dimensions ettolerances Partie 2: Série basée sur les inches 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 writtenconsentofIsO(Casepostale56,1211Geneva20,Switzerland,Fax +41 22 734 10 79), IHs or the Iso Licensor's members. [SO Reference number ISO 11922-2:1997(E) nternational Organization for Standardizatior Noreproductionor networking pemitedwithout licensefrom IHS Provided by IHS unde Not for Resale ISO 11922-2:1997(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 sO 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 Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 11922-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids. Together with 1SO 11922-1, it cancels and replaces ISO 3606:1976, ISO3607:1977,ISO3608:1976andISO3609:1977. IsO 11922 consists of the following parts, under the general title Thermoplastics pipes for the conveyance of fluids - Dimensions and tolerances: Part 1: Metric series Part2:Inch-basedseries Annex A of this part of iSO 11922 is for information only. ISO1997 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. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 · Switzerland Internet [email protected] X.400 c=ch;a=40Onet; p=iso; o=isocs; S=centrai Printed in Switzerland !! onalOrganizationforStandardizalion No reproduction or networking permited without license from IHS Not for Resale @ISO ISO 11922-2:1997(E) Introduction In the past, International Standards specifying the tolerances to be applied to thermoplastics pipes have covered individual materials separately. The philosophy of ISO 11922 is to combine these already published standards into a single two-part standard covering the tolerances for extruded pipes manufactured from all thermoplastics materials, thus avoiding the need for a standard to be developed for each individual material. IsO 11922 therefore contains a number of tolerance grades covering the mean outside diameter, the out-of-roundness of the outside diameter, the wall thickness at any point and the mean wall thickness. The bodies responsible for writing the various product and system standards will choose, from the specified tolerance grades, that grade which is suitable for the application and material involved. il Not fr Resale