ISO 10863:2020
Non-destructive testing of welds — Ultrasonic testing — Use of time-of-flight diffraction technique (TOFD)

Standard No.

ISO 10863:2020

Release Date

2020

Published By

International Organization for Standardization (ISO)

Latest

ISO 10863:2020

Scope

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 (5920 ± 50) m/s for longitudinal waves and (3255 ± 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.

ISO 10863:2020 Referenced Document

• ISO 16828 Non-destructive testing - Ultrasonic testing - Time-of-flight diffraction technique as a method for detection and sizing of discontinuities
• ISO 17640 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment
• ISO 5577 Non-destructive testing - Ultrasonic testing - Vocabulary
• ISO 9712 Non-destructive testing — Qualification and certification of NDT personnel*， 2021-12-21 Update

ISO 10863:2020 history

• 2020 ISO 10863:2020 Non-destructive testing of welds — Ultrasonic testing — Use of time-of-flight diffraction technique (TOFD)
• 2011 ISO 10863:2011 Non-destructive testing of welds - Ultrasonic testing - Use of time-of-flight diffraction technique (TOFD)