ISO/TS TECHNICAL SPECIFICATION 16479 First edition 2012-10-01 Thermoplastics pipes for the conveyance of fluids - Determination of the slow cracking resistance of pipes and fittings using the Notched Ring Test (NRT) Tubes en matieres thermoplastiques pour le transport des fluides - Determination de la résistance des tubes et raccords a la propagation lente de la fissure au moyen d'essais sur sections fendues Reference number IS0/TS 16479:2012(E) LSO @ ISO 2012 I without license from IHS Not for Resale IS0/TS 16479:2012(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 addressbeloworIso'smemberbodyinthecountryoftherequester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel.+4122 749 0111 Fax +41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2012 - All rights reserved Not for Resale IS0/TS 16479:2012(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle ..2 5 Apparatus .3 5.1 Loading apparatus .3 5.2 Ring deflection measuring device .3 5.3 Temperature chamber 4 5.4 Testmedium ..4 5.5 Timing device .4 5.6 Microscope .4 5.7 Notching apparatus. .5 6 Test specimen. .7 6.1 Specimen geometry and dimensions 6.2 Specimen preparation 7 6.3 Specimen conditioning. .9 7 Procedure .9 7.1 Conditioning .9 7.2 Load application .9 7.3 On-set slow cracking time detection .10 7.4 Notch depth measurement .10 7.5 Number of specimens .10 8 Test report ..10 Annex A (informative) On-set slow cracking time detection ..12 Annex B (informative) Stress intensityfactor plot ..16 Annex C (informative) Flexure load estimation .20 Bibliography .21 iii ded by IHS under lic ense with ISt d without license from IHS Not for Resale