Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
권호 표지

Stress Analysis and Residual Life Assessment of T-piece of High Temperature Pipe

고온배관 T-부의 응력해석 및 잔여수명평가

  • Kwon, Yang-Mi (Graduate School, Department of Mechanical Engineering, Chung Ang University) ;
  • Ma, Young-Wha (Graduate School, Department of Mechanical Engineering, Chung Ang University) ;
  • Cho, Seong-Wook (Department of Mechanical Engineering, Chung Ang University) ;
  • Yoon, Kee-Bong (Department of Mechanical Engineering, Chung Ang University)
  • 권양미 (중앙대학교 기계공학부 대학원) ;
  • 마영화 (중앙대학교 기계공학부 대학원) ;
  • 조성욱 (중앙대학교 기계공학부) ;
  • 윤기봉 (중앙대학교 기계공학부)
  • Published : 2005.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

For assessing residual lift of the steam pipe in fossil power plants, inspections and analysis are usually focused on the critical locations such as butt welds, elbows, Y-piece and T-piece of the steam pipes. In predicting the residual life of T-piece, determination of local stress near welds considering system load as well as internal pressure is not a simple problem. In this study, stress analysis of a T-piece pipe was conducted using a three-dimensional model which represents the T-piece of a domestic fossil power station. Elastic and elastic-creep analysis showed the maximum stress level and its location. Residual creep rupture life was also calculated using the stress analysis results. It was argued that the calculated life is reasonably same as the measured one. The stress analysis results also support life prediction methodology based on in-field replication technique.

Keywords

References

  1. 윤기봉, 이해무, 남승훈, 김시천, 박종서, '영월 화력 정밀진단 및 수명평가 (영월화력1호기, 터빈 및 보조기기)', KRISS-93-141- IR, 1993
  2. 백운봉, 이해무, 박종서, 김시천, '삼천포화력 제2호기 정밀진단 및 수명평가(터빈 및 보조기기)',KRISS-99-105-IR, 1999
  3. 윤기봉, 이해무, 남승훈, 김시천, 박종서, '고온사용설비 파손방지 기술개발', 과학기술처.KRISS-92-088-IR, 1992
  4. 문한규, 이해무, 윤기봉, 남승훈, 김시천, 박종서, '고온사용설비의 비파괴 진단기술개발,' KRISS- 92-063-IR, 1993
  5. 신규인, 권양미, 김윤재, 윤기봉, 'T 배관의 고온 에서의 건전성 평가', 산업안전학회 춘계학술발표회, pp. 333-338, 2005
  6. Patel, R. D., 'Creep Life Assessment of Welded Trunnion and Branch Components Using the R5 Procedure', Int. J. Pres. Ves. & Piping, Vol. 80, pp. 695-704, 2003 https://doi.org/10.1016/j.ijpvp.2003.08.006
  7. 이형일, 한태수, 정재헌, '반타원 표면균열을 갖는 고온 T-형 배관의 수명평가', 대한기계학회 재료및파괴부분 학술대회논문집, pp. 33-40, 2000
  8. Wang, B., Hu, N., Kurobane, Y., Makino Y. and Lie, S.T., 'Damage Criterion and Safety AssessmentApproach to Tubular Joints', Engineering Fracture, Vol. 22, pp. 424-434, 2000
  9. Miroshnik, R., Shaked, Y. and Elmakis, D., 'Life Assessment Evaluation of Piping Branch Connection under Creep and Fatigue', Int. J. Pres. Ves. & Piping, Vol. 71, pp. 147-154, 1997 https://doi.org/10.1016/S0308-0161(96)00060-9
  10. 윤기봉, 이해무, '부산화력 3호기 정밀진단 및 수명평가 (터빈 증기관 및 보조기기)', KRISS-95-128-IR, 1995
  11. 백운봉, 이해무, 박종서, 윤기봉, '고온용 압력용기의 크리프 균열성장 잔여수명평가 사례 연구', 산업안전학회지, Vol. 16, No. 3, pp. 26-30, 2001
  12. 백운봉, 윤기봉, 이해무, 서창민, 'Cr-Mo강 용접계면균열의 크리프-피로 균열성장거동', 대한기계학회 논문집 A, 제24권, 12호, Vol. 24, No. 12,pp. 3088-3095, 2000
  13. Shard, P.A., Hurst, A.M. and Jagger, M., 'Hartlepool Power Station Defect Assessment of the Hot Reheat Crossover Branch Weld B2C/SR98F', Task34627, 1998
  14. Laham, S. A., Large Bore Branch Test Creep Analysis, EPD/GEN/REP/0371, 1999
  15. NRIM CREEP DATA SHEET No. 9B
  16. ANSYS User's 'Modeling Material Nonlinearities'