ISO INTERNATIONAL STANDARD 19240 First edition 2017-05 Industrial valves Lined metal quarter turn and check valves for chemical process and related industries Robinetterie industrielle - Robinets quart de tour et clapets de non- retour métalliques revetus pour les industries de procédé chimique et industriesconnexes Reference number ISO 19240:2017(E) International Organization for Standardization @ IS0 2017 e=ZHEJIANG INSTOF STANDARDIZATION C1 5956617 mitted without license from IHS IS0 19240:2017(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 copyright@iso.org www.iso.org Licensee-ZHEJIANG INST OF STANDARDIZzRoISQ7 - All rights reserved Not for Resale, 2017/8/21 00:55:22 networking permited without license from IHS IS0 19240:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references 3 Terms and definitions 4 Pressure/temperature ratings 3 5 Design .3 5.1 Body wall thickness .3 5.2 Lining and seat materials ..4 5.3 Liner anchoring .4 5.4 Minimum lining thickness. 5.5 Shaft... .4 5.6 Dimension and tolerances of body ends ..4 5.6.1 Dimensions of flanges 4 5.6.2 Face-to-face dimensions 5.6.3 Flange facing type and dimension ..4 Marking .5 6 7 Inspection and testing ..6 7.1 Lining test. 7.1.1 Visual inspection .6 7.1.2 Porosity test .6 7.1.3 Anti-static test. ..6 7.2 Pressure test .6 7.3 Allowable closure test leakage rate. .. 6 7.4 Additional examination .6 Bibliography 7 iii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under I se with ISt ed withoutlicense from IHS