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  • BSI
    BS EN ISO 10863:2020 Non-destructive testing of welds. Ultrasonic testing. Use of time-of-flight diffraction technique (TOFD)
    Edition: 2020
    $500.66
    / user per year

Description of BS EN ISO 10863:2020 2020

This document specifies the application of the time-of-flight diffraction (TOFD) technique to the semi- or fully automated ultrasonic testing of fusion-welded joints in metallic materials of minimum thickness 6 mm.

It applies to full penetration welded joints of simple geometry in plates, pipes, and vessels, where both the weld and the parent material are low-alloyed carbon steel. Where specified and appropriate, TOFD can also be used on other types of materials that exhibit low ultrasonic attenuation (especially that due to scatter).

Where material-dependent ultrasonic parameters are specified in this document, they are based on steels having a sound velocity of (5 920 ± 50) m/s for longitudinal waves and (3 255 ± 30) m/s for transverse waves. It is necessary to take this fact into account when testing materials with a different velocity.

This document makes reference to ISO 16828 and provides guidance on the specific capabilities and limitations of TOFD for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. TOFD can be used as a stand-alone method or in combination with other non-destructive testing (NDT) methods or techniques, for manufacturing inspection, and for in-service inspection.

This document specifies four testing levels (A, B, C, D) in accordance with ISO 17635 and corresponding to an increasing level of testing reliability. Guidance on the selection of testing levels is provided.

This document permits assessment of TOFD indications for acceptance purposes. This assessment is based on the evaluation of transmitted, reflected and diffracted ultrasonic signals within a generated TOFD image.

This document does not include acceptance levels for discontinuities.



Standard NumberBS EN ISO 10863:2020
TitleNon-destructive testing of welds. Ultrasonic testing. Use of time-of-flight diffraction technique (TOFD)
StatusDefinitive
Publication Date2020-06-10
ReplacesBS EN ISO 10863:2011
Identical National Standard OfEN ISO 10863, ISO 10863
DescriptorsMetals, Time, Non-destructive testing, Diffraction, Ultrasonic testing, Welded joints, Sonic testing, Inspection, Low-alloy steels, Approval testing, Steels, Flaw detection, Control samples, Fusion welding, Test equipment
ICS25.160.40 Welded joints and welds
CommitteeWEE/2
ISBN978 0 580 99979 6
PublisherBSI
Pages46

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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