Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

An Evaluation of the Effect of Internal Thinning Defect on the Failure Pressure of Elbow

곡관의 손상압력에 미치는 내부 감육결함의 영향 평가

  • Kim, Jin-Weon (Department of Nuclear Engineering, Chosun University) ;
  • Kim, Tae-Soon (Nuclear Laboratory, Korea Electric Power Research Institute) ;
  • Park, Chi-Yong (Nuclear Laboratory, Korea Electric Power Research Institute)
  • 김진원 (조선대학교 원자력공학과) ;
  • 김태순 (한전 전력연구원 원자력연구실) ;
  • 박치용 (한전 전력연구원 원자력연구실)
  • Published : 2003.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the present study, three-dimensional finite element analysis was performed to investigate the effects of internal wall thinning defect on the failure pressure of elbow in the piping system and to develop the failure pressure evaluation model. From the results of finite element analysis, the failure pressure was derived by employing local stress criteria, and the effects of thinning location, bend radius, and defect geometry on the failure pressure of internally wall thinned elbow were investigated. Also, based on these investigations and previous model developed to estimate the failure pressure of elbow with an external pitting defect, the failure pressure evaluation model to be applicable to the elbow containing an internal thinning defect was proposed and compared with the results of finite element analysis. The failure pressure calculated by the model agreed well with the results of finite element analysis.

Keywords

References

  1. Chexal, B., Horowitz, J., Dooley, B., Millett, P., Wood, C., and Jones, R, 'Flow-Accelerated Corrosion in Power Plant', EPRI/TR-1066II-R2, 1998
  2. Deardorff, A.F. and Bush, S.H, 'Development of ASME section XI criteria for erosion corrosion thinning of carbon steel piping', Proceedings of ASME Pressure Vessels and Piping Conference, PVP-Vol-186, NDE-Vol.7, pp. 71-75, 1990
  3. Merz, K. L. and Ibanez, P., 'Seismic and Dynamic Reliability of Eroded/Corroded Piping Components', EPRI TR-102066, 1993
  4. American Society of Mechanical Engineer, ASME B&PV Sec.XI, Div.1 ASME Code Case N-480, 'Examination Requirements for Pipe Wall Thinning Due to Single Phase Erosion and Corrosion', 1990ed
  5. American Society of Mechanical Engineer, ASME B&PV Sec.XI, Div.1, ASME Code Case N-597, 'Requirement for Analytical Evaluation of Pipe Wall Thinning', 1998ed
  6. Japan Atomic Energy Research Institute, 'Technical Report on the Piping Reliability Tests at the Japan Atomic Energy Research Institute (Japanese)', JAERI-M, 93-074, pp. 104~115, 1993
  7. Miyazaki, K., Kanno, S., Ishiwata, M., Hasegawa, K., Ahn, S. H, and Ando, K., 'Fracture behavior of carbon steel pipe with local wall thinning subjected to bending load', Nucl. Eng. & Des, Vol. 191, pp. 195-204, 1999 https://doi.org/10.1016/S0029-5493(99)00141-7
  8. Draft for ASME Sec.XI, App.x, 'Analytical evaluation of internal or external wall thinning in piping systems', 2003, rev.8
  9. 'ABAQUS User's manual', Hibbitt, Karlson & Sorensen, Inc., 2001
  10. Wilkowski, G., Stephens, D., Krishnaswamy, P., Leis, B., and Rudland, D., 'Progress in Development of Acceptance Criteria for Local Thinned Areas in Pipe and Piping Components', Nucl. Eng. & Des., Vol. 195, pp. 149-169, 2000 https://doi.org/10.1016/S0029-5493(99)00245-9
  11. Zhang, L., Wang, Y., Chen, J., and Liu, C., 'Evaluation of local thinned pressurized elbow', Int. J. Press. Ves. & Piping, Vol. 78, pp. 697-703, 2001 https://doi.org/10.1016/S0308-0161(01)00125-9
  12. Kiefuer, J.F. and Vieth P.H, 'New method corrects criterion for evaluating corroded pipe', Oil Gas J, Vol. 32, pp. 56-59, 1988