ISO INTERNATIONAL STANDARD 161-2 Second edition 1996-12-15 Thermoplastics pipes for the conveyance of fluids Nominal outside diameters and nominal pressures - Part 2: Inch-based series Tubes en matieres thermoplastiquespour le transport des fluides- Diametres extérieurs nominaux et pressions nominales- 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 written consent of Iso (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41227341079),IHSortheISOLicensor'smembers. ISO Reference number ISO 161-2:1996(E) Copyright Intermational Organization for Standardization ense from IHS Not for Resale ISO 161-2:1996(E) Foreword ISO (the International Organization for Standardization) is a worldwide fed- 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 Standard requires approval by at least 75 % of the member bodies casting avote International Standard ISO 161-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport of fluids. which has been technically revised. ISO 161 consists of the following parts, under the general title Thermo- plastics pipes for the conveyance of fluids - Nominal outside diameters and nominal pressures: Part1:Metricseries Part 2: Inch-based series Annex A of this part of ISO 161 is for information only @ISO1996 All rights reserved. Uniess 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-1211Geneve 20.Switzerland Printed in Switzerland i on or networking permited withoutlicensefrom IHS Not for Resale ISO 161-2:1996(E) @ISO Introduction In this part of IsO 161, some of the abbreviations used have been derived from the French language and others from English. It has been agreed to maintain the same abbreviations in both the French and English versions of the document. For reference, the abbreviations are listed below with the originating languagegiven first and thetranslation second: PN: Pression nominale (F) Nominal pressure (E) PMS: Pression maximale de service (F) Maximum allowable operating pressure (E) MRS: Minimum required strength (E) Résistance minimale requise (F) Os: Design stress (E) Contrainte de calcul (F) ili CopyrightltematinalOrganizatin for Standardization No reproduction or networking permitted without license from IHS Not for Resale