ISO INTERNATIONAL STANDARD 5948 Third edition 2018-12 Railway rolling stock material - Ultrasonic acceptance testing Matériel roulant de chemin de fer Essai de réception aux ultrasons Reference number IS0 5948:2018(E) osi @IS02018 IS0 5948:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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 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 copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland i @ IS0 2018 - All rights reserved IS0 5948:2018(E) Contents Page Foreword .iv 1 Scope 1 2 Normative references ..1 3 Terms and definitions ..1 4 Ordering 5 Location of testing and qualification of the personnel ..4 6 Time of testing. ..4 7 Surface condition of the products. ..4 8 Characteristics of test equipment. .4 8.1 Ultrasonic instrument ..4 8.2 Probes ..5 8.3 Otherdevices ..5 9 Couplants ..5 10 Setting of the sensitivity of the ultrasonic instrument ..5 10.1 General .5 10.2 Sensitivity setting for wheels or tyres . ..5 10.3 Sensitivity setting for testing axles in the radial direction .6 10.4 Sensitivity setting for determining the ultrasonic permeability of axles .6 11 Scanning ..6 12 Evaluation of indications ..7 12.1 Estimation of the size of discontinuities .7 12.2 Evaluation of the loss of back-wall echo ..7 12.3 Determination of the ultrasonic permeability of axles ..7 13 Acceptance levels .7 13.1 General, ..7 13.2 Discontinuity detection ..7 13.3 Ultrasonic permeability of axles .8 Annex A (normative) Reference blocks for discontinuity detection tests. .9 Annex B (informative) Reference block for determining the ultrasonic permeability of axles.. ..14 Bibliography .15 @ IS0 2018 - All rights reserved ii