ISO INTERNATIONAL STANDARD 16631 Firstedition 2016-03-01 Ductile iron pipes, fittings, accessories and their joints compatible with plastic (PVC or PE) piping systems, for water applications and for plastic pipeline connections, repair and replacement Tuyaux, raccords et accessoires en fonte ductile et leurs assemblages compatibles avec les canalisations plastiques (PvC ouPE)pour la distribution d'eau et pour les connexions, réparations et remplacements des canalisations en matieres plastiques Reference number IS0 16631:2016(E) ISO International Organization for Standardization @ IS0 2016 d without license from IHS IS0 16631:2016(E) COPYRIGHTPROTECTEDDOCUMENT IS02016,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intenationaibr PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZoISQ s.6 - All rights reserved etworking permitted without license from IHS IS0 16631:2016(E) Contents Page Foreword ..V 1 Scope .1 2 Normative references 3 Terms and definitions. 4 Technical requirements. 4.1 General .. 6 4.2 General requirements 4.2.1 Pipes and fittings nominal sizes .6 4.2.2 Surfacecondition ..6 4.2.3 Types of joints and interconnection. .6 4.2.4 Materials in contact with water intended for human consumption ..7 4.3 Pressure classification and dimensional requirements. .8 4.3.1 Pressure classification .8 4.3.2 Diameter .8 4.3.3 Wall thickness .9 4.3.4 Length. ..9 4.3.5 Straightness of pipes .9 4.4 Material characteristics. 4.4.1 Tensile properties .9 4.4.2 Brinell hardness .10 4.5 Coatings and linings for pipes. .10 4.5.1 General ..10 4.5.2 External coatings ..10 4.5.3 Internal linings .10 4.6 Coatings and linings for fittings and accessories ..10 4.7 Marking .11 4.8 Packaging and handling .11 5 Leaktightness requirements ..11 5.1 Pipes and fittings. ..11 5.2 Flexible joints. ..12 5.2.1 General .12 5.2.2 Ductile iron socket assembled with ductile iron spigot end ..12 5.2.3 Ductile iron socket assembled with plastic spigot end ..13 6 Test methods. .17 6.1 Dimensions ..17 6.1.1 External diameter ..17 6.1.2 Wall thickness .17 6.1.3 Length. .17 6.2 Straightness of pipes .17 6.3 Tensiletest.. .18 6.3.1 Centrifugally cast pipes .18 6.3.2 Fittings and accessories. .18 6.3.3 Test bar. ..18 6.3.4 Equipment and test method .18 6.3.5 Test results. ..18 6.3.6 Test frequency ..18 6.4 Brinell hardness. .18 6.5 Works leaktightness test of pipes and fittings .19 6.5.1 General 6.5.2 Centrifugally cast pipes ..19 6.5.3 Fittings ..19 7 Type tests ..19 iii ISee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vithoutlicense from IHS Not for Resale, 2016/4/26 02:56:10