ISO INTERNATIONAL STANDARD 16823 First edition 2012-04-01 Non-destructive testing Ultrasonic testing Transmission technique Essais non destructifs-Controle par ultrasons-Technique par transmission Reference number ISO 16823:2012(E) @ISO2012 without license from IHS Not for Resale ISO 16823:2012(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either Iso at the address below or Iso's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2012 All rights reserved without ficense from IHS Not for Resale ISO 16823:2012(E) Contents Page Foreword Introduction V 1 Scope, 2 Normativereferences. 3 Terms and definitions. 4 Principles of the examination .. 4.1 Basic techniques and set.up........... 4.2 Capabilityofdetectionofimperfections... 4.3 Requirementsforgeometryandaccess 4.4 Effectsof variations in coupling,angulationandalignment ofprobe 5 Examination technique. 5.1 5.2 Sensitivity setting.. 5.3 Scanning..... 5.4 Evaluationof imperfections........ 5.5 Determination of attenuation coefficient .... ili CoyrtIntemalialOzaandardallonghtsreserved Not for Resale ISO16823:2012(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75%of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO16823was prepared byTechnical Committee ISO/TC 135,Non-destructive testing,Subcommittee SC 3, Ultrasonic testing. ISO 2012 - All rights reserved lonalOrganizationfor Standardizatior Not for Resale ISO16823:2012(E) Introduction This International Standard is based on EN 583-3:1997,Non-destructive testing-Ultrasonic examination- Part3:Transmission technique. The following International Standards are linked. ISO16810,Non-destructivetesting-Ultrasonictesting-Generalprinciples Iso16811, Non-destructive testing—Ultrasonic testing-Sensitivity and range setting Iso16823,Non-destructivetesting—Ultrasonictesting—Transmissiontechnique Iso 16826,Non-destructive testing-Ultrasonic testing-Examination for discontinuities perpendicular to the surface Iso16827,Non-destructivetesting-Ultrasonic testing—Characterization and sizing of discontinuities Iso 16828,Non-destructive testing-Ulitrasonic testing-Time-of-flight diffraction technique as a methodfor detectionandsizingofdiscontinuities ense from IHS Not for Resale darda Not fr Resale ISO 16823:2012(E) INTERNATIONALSTANDARD Non-destructive testing Ultrasonic testing Transmission technique 1 Scope This International Standard specifies the principles of transmission techniques Transmission techniques can be usedfor: detection of imperfections; determination of attenuation. The general principles required for the use of ultrasonic examination of industrial products are described in ISO16810. The transmission technique is used for examination of flat products, e.g. plates and sheets. Further, it is used for examinations e.g. whe