Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Technique for Defect Detection of Condenser Tube in Support Plate Region using Guided Wave

유도초음파를 이용한 복수기 튜브지지판 영역에서의 결함검출기법

  • Kim, Yong-Kwon (Dept. of Mechanical and Automotive Engineering, Seoul National Univ. of Science & Technology) ;
  • Park, Ik-Keun (Dept. of Mechanical and Automotive Engineering, Seoul National Univ. of Science & Technology) ;
  • Park, Sae-Jun (Non-Destructive Examination Dept., Doosan Heavy Industries & Construction) ;
  • Ahn, Yeon-Shik (KEPCO Research Institute) ;
  • Gil, Doo-Song (KEPCO Research Institute)
  • 김용권 (서울과학기술대학교 기계.자동차공학과) ;
  • 박익근 (서울과학기술대학교 기계.자동차공학과) ;
  • 박세준 (두산중공업 비파괴검사팀) ;
  • 안연식 (한전 전력연구원) ;
  • 길두송 (한전 전력연구원)
  • Received : 2012.08.26
  • Accepted : 2012.12.31
  • Published : 2012.12.31
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Abstract

General condensers consist of many tubes supported by tube sheets and support plates to prevent the deflection of the condenser tubes. When a fluid at high pressure and temperature runs over the tubes for the purpose of transferring heat from one medium to another, the tubes vibrate and their surface comes into contact with the support plates. This vibration causes damage to the tubes, such as cracks and wear. We propose an ultrasonic guided wave technique to detect the above problems in the support plate region. In the proposed method, the ultrasonic guided wave mode, L(0,1), is excited using an internal transducer probe from a single position at the end of the tube. In this paper, we present a preliminary experimental verification using a super stainless tube and show that the defects can be discriminated from the support signals in the support region.

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References

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