ISO INTERNATIONAL STANDARD 11673 First edition 2005-04-01 Unplasticized poly(vinyl chloride) (PvC-U) pressure pipes - Determination of the fracture toughness properties Tubes en poly(chlorure de vinyle) non plastifie (PVC-U) sous pression-Determination de la tenacite Reference number ISO 11673:2005(E) @ISO2005 mational Organization for Standardization No reproduction or networking permited without license from IHS Not for Resale ISO 11673:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. @ISO2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ISO's member body in the country of the requester. ISO copyright office Casepostale 56:CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2005 - All rights reserved Copyrahtlintematinalonganizationfor Standardzaion No reproduction or networking permitted without license from IHS Not for Resale ISO11673:2005(E) Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Termsanddefinitions. 4 Symbols 5 Principle 6 Preliminary test for response to immersion in dichloromethane 6.1 Reagents 6.2 Apparatus... 6.3 Testspecimen 6.4 Procedure.... 6.5 Assessmentofresults. 7 Determinationoffracturetoughness 7.1 Apparatus..... 7.2 Preparationoftestpiece 7.3 Conditioning.... 7.4 Procedure..... 8 Expression of results. 9 Test report... Annex A (normative) Mathematical calculations.... Annex B (informative) Further guidance .. 12 Annex C (normative) Determination of yield strength Bibliography . 14 Copyright Intemational Organization... Standardizationrights reserved d by IHS unc Nerepoductionarnetworking pemitedwithout icanse from H Not for Resale ISO11673:2005(E) Foreword (ISO member bodies). The work of preparing International Standards is normally carried out through ISO International Electrotechnical Commission (lEC) on all matters ofelectrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. transport of fluids, Subcommittee SC 5, General properties of pipes,fittings and valves of plastics materials andtheiraccessories-Testmethods andbasic specifications. @ ISO 2005 - All rights reserved ational Organization for Standardizatio permitted without license from IHS Not fr Ressle ISO 11673:2005(E) Introduction Studies have been undertaken at the international level to determine a method of measuring the characteristics of unplasticized poly(vinyl chloride) (PVC-U) which influence the ability of the pipe to withstand brittle failure emanating from minor flaws in the pipe matrix These studies have demonstrated that a test which measures fracture toughness characteristics of the material fulfils these requirements. The method involves immersing a prepared test piece in dichloromethane to identify the point around the