ISO INTERNATIONAL STANDARD 13480 First edition 1997-09-15 Polyethylene pipes -- Resistance to slow crack growth Cone test method Tubesenpolyethylene--Resistancealapropagationlentedes fissures-Methoded'essaiaveclecone 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 inanyform,electronic retrieval system or otherwise,exceptas 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 13480:1997(E) ISO 13480:1997(E) @ISO 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 estabished has 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 intermational Standard requires approval by at least 75 % of the member bodies casting a vote. valves for the transport of fluids, Subcommittee Sc 5, General properties of pipes, fittings and valves of plastic materialsandtheiraccessories--Testmethodsandbasicspecifications. Annex Aof this International Standard is for information only ISO1997 All ights 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 OrganizationforStandardization Case postale 56 : CH-1211 Geneve 20 . Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; o=isocs; S=central Printed in Switzerland i ISO 13480:1997(E) INTERNATIONALSTANDARD @ISO Polyethylene pipes Resistance to slow crack growth - Cone test method 1 Scope This International Standard specifies a method of test for determining the resistance to slow crack growth of polyethylene pipe expressed in terms of the rate of crack growth in a notched pipe ring subject to a constant hoop strain and immersed in a surface active solution held at an elevated temperature. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. iso3126:1974,PlasticspipesMeasurementofdimensions. iso13479:1997,Polyolefin pipes for the conveyanceof fluids-Determinationof resistance to crack propagation -- Test method for slow crack growth on notched pipes (notch test). 3Principle Rings cut from pipe to a specified length are held at a constant strain by insertion of a mandrel and a single notch is temperature of 8o C ± 1 °C. The rate of growth of the crack propagating from the notch is measured. The test is applicabletopipeofwall thicknessuptoand including5mm. NOTE1 For wall thickness greater than 5 mm, IsO 13479 is applicable.