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  • BSI
    BS EN ISO 17640:2018 Non-destructive testing of welds. Ultrasonic testing. Techniques, testing levels, and assessment
    Edition: 2019
    $418.55
    / user per year

Description of BS EN ISO 17640:2018 2019

This document specifies techniques for the manual ultrasonic testing of fusion-welded joints in metallic materials of thickness ≥8 mm which exhibit low ultrasonic attenuation (especially that due to scatter) at object temperatures from 0 °C to 60 °C. It is primarily intended for use on full penetration welded joints where both the welded and parent material are ferritic.

Where material-dependent ultrasonic values are specified in this document, they are based on steels having an ultrasonic sound velocity of (5 920 ± 50) m/s for longitudinal waves and (3 255 ± 30) m/s for transverse waves.

This document specifies four testing levels, each corresponding to a different probability of detection of imperfections. Guidance on the selection of testing levels A, B, and C is given in Annex A.

This document specifies that the requirements of testing level D, which is intended for special applications, be in accordance with general requirements. Testing level D can only be used when defined by specification. This includes tests of metals other than ferritic steel, tests on partial penetration welds, tests with automated equipment, and tests at object temperatures outside the range 0 °C to 60 °C.

This document can be used for the assessment of discontinuities, for acceptance purposes, by either of the following techniques:

  1. evaluation based primarily on length and echo amplitude of the discontinuity;

  2. evaluation based on characterization and sizing of the discontinuity by probe movement techniques.



Standard NumberBS EN ISO 17640:2018
TitleNon-destructive testing of welds. Ultrasonic testing. Techniques, testing levels, and assessment
StatusConfirmed
Publication Date2019-01-23
ReplacesBS EN ISO 17640:2017
Identical National Standard OfISO 17640:2018, EN ISO 17640:2018
DescriptorsMetals, Flaws, Probes, Scanners, T-joints, Ultrasonic testing, Butt joints, Attenuation, Size measurement, Non-destructive testing, Welded joints, Defects, Acceptance inspection, Testing conditions, Surface texture, Corner joints, Fusion welding, Welding, Reflectance factor, Examination (quality assurance), Grades (quality), Sensitivity
ICS25.160.40 Welded joints and welds
CommitteeWEE/46
ISBN978 0 539 00771 8
PublisherBSI
Pages40

The following editions for this book are also available...

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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