ISO INTERNATIONAL STANDARD 9080 Second edition 2012-10-15 Plastics piping and ducting systems Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation Systemes de canalisations et de gaines en matieres plastiques - Determination de la résistance hydrostatique a long terme des matieres thermoplastiques sous forme de tubes parextrapolation Reference number ISO 9080:2012(E) ISO @ ISO 2012 ed without license from IHS Not for Resale ISO 9080:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Casepostale56·CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 4122 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2012 -All rights reserved No reproductic etworking permitted without license from IHS Not for Resale ISO 9080:2012(E) Contents Page Foreword ..iv Introduction 0.1 General. 0.2 Principles 0.3 Use of the methods. vi 1 Scope. 2 Normative references. 3 Terms and definitions... 4 Acquisition of test data. 3 4.1 Testconditions. 3 4.2 Distribution of internal pressure levels and time ranges 3 5 Procedure.. 3 5.1 Data gathering and analysis.. 3 5.2 Extrapolation time factors for polyolefins (semi-crystalline polymers)... .6 5.3 Extrapolation time factors for glassy, amorphous vinyl chloride based polymers 5.4 Extrapolation time factorsforpolymers other than those covered in5.2 and 5.3. 6 Example of calculation, software validation 7 Test report.... Annex A (normative) Methods of analysis. 9 Annex B (normative) Automatic knee detection.. Annex C (informative) Application of SEM to stress rupture data of a semi-crystalline polymer .. Annex D (informative) Application of SEM to stress rupture data of a vinyl chloride based polymer....22 Annex E (informative) Software for calculation of stress-rupture data according to Iso 9080.. Bibliography 29 ili nse from IHS Not for Resale