ISO INTERNATIONAL STANDARD 20669 First edition 2017-03 Non-destructive testing Pulsed eddy current testing of ferromagnetic metallic components Essais non destructifs-Controlepar courants deFoucault pulses de composantsmetalliquesferromagnétiques Referencenumber IS020669:2017(E) Intemational Organization for Standardization @IS02017 =ZHEJIANG INSTOFSTANDARDIZATIONC15956617 ted without license from IHS IS0 20669:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,Published in Switzerland 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. ISOcopyrightoffice Ch. de Blandonnet 8.CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 01 11 Fax+41227490947 [email protected] www.iso.org Licensee-ZHEJIANG INSTOF STANDARDIZARoISQ0,7 - All rights reserved networking permited without license from IHS Not for Resale, 2017/5/11 01:58:52 IS020669:2017(E) Contents Page Foreword ..iv 1 Scope. ..1 2 Normativereferences 3 Terms and definitions 4 General principles. .2 4.1 Principles of PEC testing .2 4.2 Characteristicsof PECtesting .4 4.2.1 Advantages 4 4.2.2 Limitations .4 4.3 Influencefactors 5 4.3.1 Coating .5 4.3.2 Tested component. 5 4.3.3 Temperature .5 4.3.4 Probe .5 4.3.5 Reference zone .5 4.3.6 Otherfactors. .5 5 Qualification of personnel .6 6 Equipment. .6 6.1 Testing system. .6 6.2 PEC instrument. 6.3 Probe. .6 6.4 Sensitivity adjustment ..6 6.5 Testpieces. .7 6.5.1 Referenceblocks 1 6.5.2 Spacers .8 6.5.3 Metal sheet cover. .8 6.6 Maintenance andverification of equipment .8 7 On-site testing .8 7.1 Preparation of documentation .8 7.1.1 Documentprerequisites .8 7.1.2 Site investigation 8 7.1.3 Preparation of testing procedureand record sheets .8 7.2 Preparation of the component to be tested. .9 7.2.1 Surface preparation. ..9 7.2.2 Identification 9 7.3 Selectionofthereferences. .9 7.3.1 Principles.. .9 7.3.2 Reselection of references 10 7.3.3 Record of references. .10 7.4 Performing test. .10 7.5 Safety ..10 8 Interpretation and evaluation of test results ..10 9 Verificationoftestresults. ..10 10 Documentation .11 10.1 General .11 10.2 General written testing procedure .11 10.3 Testing record .12 10.4 Testing report. .12 Bibliography .13 iii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 withoutlicense from IHS