ISO 16809 2017 无损检测-超声波厚度测量(英文版).pdf

16809,2017,ISO,国外及港澳台标准
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INTERNATIONAL STANDARD

Non-destructivetesting-Ultrasonic thicknessmeasurement

Essais non destructifs - Mesurage de I'epaisseur par ultrasons

COPYRIGHTPROTECTEDDOCUMENT

@ ISO 2017 Published in Switzerland

All rights reserved. Unless otherwise specified no part of this publication may be reproduced or utilized otherwise in any formwritten permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of or by any means electronic or mechanical including photocopying or posting on the internet or an intranet without prior the requester.

ISO copyright oficeCh. de Blandonnet 8 • CP 401 CH-1214 Vermier Geneva Switzerland Fax 41 22 749 09 47 Tel. 41 22 749 01 11copyright@

Contents

Page

1 Scope. 12 Normative references. 13 Terms and definitions 14 Measurement modes. 1

5.1 Instruments. 35.2 Probes.. 35.4 5.3 Couplant. Reference blocks.5.5 5.6 Test objects. Qualification of personnel. 3f

Application of the technique. 4

6.1 6.2 Surface conditions and surface preparation. Technique. 46.2.1 General. 4 46.2.2 6.2.3 Measurement during manufacture. In-service measurement of residual wall thickness. 5 59 Selection of instrument. Selection of probe. 66.4 6.5 Materials different from the reference material. 6 66.6 Special measuring conditions.. 6.6.1 General. 76.6.2 Measurements at temperatures below 0 °C. 76.6.3 6.6.4 Measurements at elevated temperatures. Hazardous atmospheres. 7 7

Instrument setting7.2 7.1 Methods of setting General. 7 87.2.1 7.2.2 Digital thickness instruments. General. 87.2.3 A-scan instrument. 8 87.3 Checks of settings 6

8 Influence on accuracy.. 10

8.1 Operational conditions. 108.1.2 8.1.1 Surface conditions. Surface temperature. 10 108.1.3 Metallic coating. 118.1.4 8.1.5 Non-metallic coating.. Geometry. 12 118.2 Equipment. 8.2.1 Resolution. 12 128.2.2 Range 138.3 Evaluation of accuracy. 8.3.1 General. 13 138.3.2 Influencing parameters. Method of calculation. 1414

Influence ofmaterials 14

9.1 Inhomogeneity. General. 149.2 86 Anisotropy 14 14

9.4 9.5 Surface conditions. Attenuation 14 149.5.1 9.5.2 Contact surface. General. 149.5.3 Reflecting surface. 15 159.5.4 Corrosion and erosion. 1510 Test report. 10.1 General. 16 1610.2 10.3 General information. Measurement data. 16 17Annex A (informative) Corrosion in vessels and piping. .18Annex B(informative) Instrument settings 23Annex C (informative) Parameters influencing accuracy. 26Annex D (informative) Selection of measuring technique. 32Bibliography. .37

Foreword

bodies (ISO member bodies). The work of preparing International Standards is normally carried outthrough ISO technical mittees. Each member body interested in a subject for which a technical mittee has been established has the right to be represented on that mittee. InternationalISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters ofelectrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance aredescribed in the ISO/IEC Directives Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with theeditorial rules of the ISO/IEC Directives Part 2 (see

Attention is drawn to the possibility that some of the elements of this document may be the subject ofpatent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/oron the ISo list of patent declarations received (see

Any trade name used in this document is information given for the convenience of users and does notconstitute an endorsement.

For an explanation on the voluntary nature of standards the meaning of ISO specific terms andexpressions related to conformity assessment as well as information about ISO's adherence to the a as (a) p s r sad (a) a p URL:

This document was prepared by Technical Committee ISO/TC 135 Non-destructive testing Submittee SC 3 Uitrasonic testing.

This second edition cancels and replaces the first edition (ISO 16809:2012) which has been technicallyrevised. The main changes pared to the previous edition are as follows:

一 editorial improvements have been made;二 the terminology has been adapted to the latest edition of ISO 5577;一 Formulae (5) and (6) have been corrected.

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