ISO INTERNATIONAL STANDARD 20238 First edition 2018-01 Conveyor belts Drum friction testing Courroiestransporteuses-Essais defrottementautambour Referencenumber IS0 20238:2018(E) ISO @IS02018 IS0 20238:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS02018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax+4122 749 09 47 copyright@iso.org www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS020238:2018(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle ..1. 5 Apparatus ..2 6 Test piece. .6 7 Procedure .6 7.1 General .6 7.2 Procedure and test.. 6 7.2.1 Selectionoftestmethod .6 7.2.2 Method A Tests in still air .6 7.2.3 Method B-Tests in moving air .8 7.3 Premature termination. .9 8 Test report. .9 @IS0 2018 -All rights reserved ili