ISO 17636-1 2022 焊缝无损检测 射线照相检测 第一部分 X射线和伽马射线技术与胶片(英文版).pdf

17636,2022,ISO,检测,焊缝,国外及港澳台标准
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INTERNATIONAL STANDARD

Non-destructivetestingofwelds- Radiographictesting-

X-andgamma-raytechniqueswith Part 1: film

Essais non destructifs des assemblages soudes - Controle parradiographie -

Partie 1: Techniques par rayons X ou gamma a laide de film

COPYRIGHTPROTECTEDDOCUMENT

@ ISO 2022

Allrights reserved. Uless otherwise specified or required in the context of its imlementation o part of this publication maybe reproduced or utilized otherwise in any form or by any means electronic or mechanical including photocopying or posting on the intermet or an intranet without prior written permission. Permission can be requested from either ISO at the address belowor ISO's member body in the country of the requester.

ISO copyright officeCH-1214 Vernier Geneva CP 401 • Ch. de Blandonnet 8Email:copyright@ Phone: 41 22 749 01 11Website: in Switzerland

Contents

Page

6.1 Protection against ionizing radiation. 46.3 6.2 Location of the weld in the radiograph. Surface preparation and stage of manufacture.6.4 Identification of radiographs. 5 56.6 6.5 Overlap of films. Marking 5 56.7 Types and positions of image quality indicators (IQIs). 56.8 6.9 Minimum image quality values. Evaluation of image quality. 6 66.10 Personnel qualification. 7

7.1 7

Test arrangements.7.1.1 7.1.2 Single-wall penetration of plane objects (see Figure 1) General. 8 77.1.3 Single-wall penetration of curved objects with the source outside the7.1.4 object (see Figures 2 to 4) Single-wall penetration of curved objects with the source inside the object 8for panoramic exposure (see Figures 5 to Z) Single-wall penetration of curved objects with the source located off- 67.1.5 centre and inside the object (see Figures 8 to 10) 107.1.6 Double-wall penetration and double-image evaluation (DWDl) of pipes with the elliptic technique and the source and the film outside the objectDouble-wall penetration and double-image evaluation (DWDl) with the (see Figure 11) 117.1.7 perpendicular technique and source and film outside the object (see7.1.8 Figure 12) Double-wall penetration and single-image evaluation (DWSl) of curved 11objects for evaluation of the wall next to the film (see Figures 13 to 16) Penetration of objects with different material thicknesses (see Figure 17 117.1.9 to 19) 137.2 7.2.1 Choice oftubevoltage andradiationsource. X-ray devices up to 1 000 kV. 13 137.2.2 Film systems and metal screens. Other radiation sources. 147.3 7.4 Alignment of beam. 15 177.5 7.5.1 Reduction of scattered radiation. Metal filters and collimators. 17 177.5.2 Source-to-object distance. Interception of backscattered radiation. 177.6 7.7 Maximum area for a single exposure. 20 187.8 7.9 Processing. Optical density of radiograph. 21 207.10 Film viewing conditions. 21

8 Test report. 21

Annex A (normative) Number of exposures for acceptable testing of a circumferential butt weld 23Annex B (normative) Minimum image quality values. 28Annex C (informative) Calculation of maximum X-ray tube voltages from Figure 20 35Bibliography. 36

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 of organizations governmental and non-governmental in liaison with ISo also take part in the work.electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance aredifferent 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 ofon 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 of 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 theWorld Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 44 Welding and allied processes Standardization (CEN) Technical Committee CEN/TC 121 Welding and allied processes in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 17636-1:2013) which has been technicallyrevised.

The main changes are as follows:

-the normative references have been updated; the Figures have been updated;- references to Figures 1 to 19 have been updated throughout the document; in 6.Z the use of ASTM wires and other image quality indicators (IQls) by agreement of contractingparties has been added;-in 6.7 a) the acceptance of a shorter wire visibility than 10 mm for pipes with an externalanbupa (m) ae-qnop mem-aqnop aoy aesn iau oy uogege e g pue gg Zg u diameter < 50 mm has been added;has been added; in 6.9 and Z.2.2 the lower thickness limit for Se 75 applications has been deleted;measurement of optical density in the root of the weld has been clarified; IQI use for the DWDI technique has been clarified. A list of all parts in the ISO 17636 series can be found on the ISO website.

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