International Standard
ISO 17640:2018
Non-destructive testing of welds — Ultrasonic testing — Techniques, testing levels, and assessment
Reference number
ISO 17640:2018
Edition 4
2018-10
International Standard
Read sample
ISO 17640:2018
75737
Published (Edition 4, 2018)
This standard was last reviewed and confirmed in 2023. Therefore this version remains current.

ISO 17640:2018

ISO 17640:2018
75737
Language
Format
CHF 151
Convert Swiss francs (CHF) to your currency

Abstract

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:

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.

General information

  •  : Published
     : 2018-10
    : International Standard confirmed [90.93]
  •  : 4
     : 30
  • ISO/TC 44/SC 5
    25.160.40 
  • RSS updates

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)