Vol. 21 No. 4 (2024): Journal of Non Destructive Testing and Evaluation (JNDE), Dec 2024
Research Papers

Tandem Wedge for In-service Inspection of Cladding to Detect Vertical Flaws in Pressure Vessel Components

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  • Peter Santan F Rodrigues,
  • N Gopalakrishnan

Published 11-12-2024

Keywords

  • Cladding,
  • NDE,
  • Ultrasonic Testing,
  • Tandem Technique,
  • Wedge

How to Cite

Peter Santan F Rodrigues, & N Gopalakrishnan. (2024). Tandem Wedge for In-service Inspection of Cladding to Detect Vertical Flaws in Pressure Vessel Components. Journal of Non-Destructive Testing & Evaluation (JNDE), 21(4), 37–41. Retrieved from https://jnde.isnt.in/index.php/JNDE/article/view/96

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Creative Commons License

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Abstract

Cladding is a process of weld overlay to protect the base metal from corrosive fluids and fumes ensuring its longevity. Cladding aid to obtain a suitable material at a reasonable cost, consisting of low-cost base material with excellent mechanical properties (such as carbon steel), and another material resistant to corrosion, abrasion or oxidation (such as stainless steel, Inconel)

To ensure bonding between the clad and parent material, Non-Destructive Examination (NDE) Techniques are used. Among the various NDE techniques, conventional ultrasonic testing (UT) serves as a reliable method during the manufacturing stage.However, during operation there is a risk of defects propagating in the clad-parent material interface, thereby reducing the service life of the product.

The conventional UT methods are not effective in detecting vertical flaws in the interface region of cladding and base metal. To effectively detect vertical flaws, a Tandem Wedge was designed for generating Longitudinal acoustic wave (L-wave) with 45° refracted angle in steel. This paper details about the design and development of the Tandem wedge to detect vertical flaws in cladding. 

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References

  1. P. Elango and S. Balaguru, Ind. J. Sci. Tech 31 (2015), 10.17485/ijst/2015/v8i31/84309
  2. M. Biטth, l. Fabbri, J.L. Monjaret, 2nd international conference on nde in relation to structural integrity for nuclear and pressurized components, New Orleans(2000).
  3. Salzburger, H.J.; Becker, R.; Hübschen, G.; Kröning, M., NDE of austenitic cladding by using low frequency eddy current and EMA-excited SH-Wave, Seminar on Structural Strength and NDE Problems in Nuclear Engineering, Stuttgart, Germany (1993)
  4. ASME Boiler and Pressure Vessel Code Section V, 2023
  5. L.M. Jablonik. , Int. J. Press. Vessel. Pip 58 (1994)
  6. Krautkrämer, Josef, Krautkrämer, Herbert , Ultrasonic testing of materials ,Verlag Berlin Heidelberg,(1990)
  7. Michael Moles, Noel Dube, Simon Labbe, Ed Ginzel, J. of Press. Vessel Tech., 127(2005)
  8. L. Satyanarayan, C. Sridhar, C.V. Krishnamurthy, Krishnan Balasubramaniam, Int. J. Press. Vessel. Pip 84 (2007) 716–729
  9. Steve Mahaut, Pierre Calmon, SylvianChatillon, RaphaëleRaillon‐Picot, Ultrasonic NDT Simulation Tools for Phased ArrayTechniques,AIPConference Proceedings 657,777(2003); doi: http://dx.doi.org/10.1063/1.1570214