ISO 17640:2018
Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment

Standard No.

ISO 17640:2018

Release Date

2018

Published By

International Organization for Standardization (ISO)

Latest

ISO 17640:2018

Scope

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 (5920 ± 50) m/s for longitudinal waves and (3255 ± 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: a) evaluation based primarily on length and echo amplitude of the discontinuity; b) evaluation based on characterization and sizing of the discontinuity by probe movement techniques.

ISO 17640:2018 Referenced Document

• EN 12668-1:2010 Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 1: Instruments
• EN 12668-2:2010 Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 2: Probes
• EN 12668-3:2013 Non-destructive testing - Characterization and verification of ultrasonic examination equipment - Part 3: Combined equipment*， 2024-04-20 Update
• ISO 11666:2018 Non-destructive testing of welds - Ultrasonic testing - Acceptance levels
• ISO 16810:2012 Non-destructive testing - Ultrasonic testing - General principles
• ISO 16811:2012 Non-destructive testing - Ultrasonic testing - Sensitivity and range setting
• ISO 16826:2012 Non-destructive testing - Ultrasonic testing - Examination for discontinuities perpendicular to the surface
• ISO 17635:2016 Non-destructive testing of welds - General rules for metallic materials
• ISO 23279:2017 Non-destructive testing of welds — Ultrasonic testing — Characterization of discontinuities in welds
• ISO 5577:2017 Non-destructive testing - Ultrasonic testing - Vocabulary
• ISO 9712:2012 Non-destructive testing - Qualification and certification of NDT personnel

ISO 17640:2018 history

• 2018 ISO 17640:2018 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment
• 2017 ISO 17640:2017 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment
• 2010 ISO 17640:2010 Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment
• 2005 ISO 17640:2005 Non-destructive testing of welds - Ultrasonic testing of welded joints