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Welding in the World

, Volume 49, Issue 9–10, pp 68–74 | Cite as

Industrial Applications of Ultrasonic Time-of-Flight-Diffraction(TOFD) Techniques for Various Field Targets

  • A. Nishikawa
  • N. Nagahama
  • K. Umeda
  • T. Sakai
  • S. I. Oya
Technical Papers

Abstract

The ultrasonic time-of-flight-diffraction (TOFD) technique has been used mainly to detect and precisely size flaws in welded butt joints. But industrial applicability of the conventional TOFD technique is restricted due to inspection targets’shape complexity and ultrasonic noise. In order to increase the applicability of the TOFD technique for real industrial targets, various improved TOFD techniques have been developed. In this paper, industrial applications and limitations of the conventional TOFD technique and newly developed TOFD technologies, which can overcome those limitations, are presented.

IIW-Thesaurus keywords

Ultrasonic testing Nondestructive testing Defects Utilisation 

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References

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    Silk M.G.: “The role of ultrasonic diffraction in NDT”, Proceedings of the 28th Annual British Conference in NDT.Google Scholar
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    Maclay A., Verkooijen J.: “Improvement in weld inspection using the Time of Flight Diffraction technique”, Proceedings of the 13th International Conference on NDT in the Nuclear and Pressure Vessel industries, Kyoto, 1995.Google Scholar
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    Nose S., Watase Y., et al., “Highly reliable Time-of-Flight-Diffraction UT Technique and its application to pressure vessel fabrication”, Proceedings of ASME/JSME Joint Pressure Vessels and Piping Conference, San Diego, 1998.Google Scholar
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    Nose S., Ohizumi H., Watase Y., et al.: Application of TOFD to heavy wall pressure vessels and steel structures, Proceedings of the 52nd Annual Assembly of IIW, Lisbon, 1999.Google Scholar
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    Trimborn N., van Nisselroij J.J.M., Bouma T.: Inspection of welded connections in complex geometries by means of the TOFD technique, Proceedings of the 7th European Conference on Non-Destructive Testing, Copenhagen, 1998.Google Scholar

Copyright information

© International Institute of Welding 2005

Authors and Affiliations

  • A. Nishikawa
    • 1
  • N. Nagahama
    • 1
  • K. Umeda
    • 1
  • T. Sakai
    • 1
  • S. I. Oya
    • 1
  1. 1.Shinko Inspection and Service Co., Ltd.Japan

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