DOI QR코드

DOI QR Code

Numerical Analysis of Corrosion Effects on the Life of Boiler Tube

보일러관의 수명에 부식이 미치는 영향에 대한 수치해석

  • Published : 2000.11.01

Abstract

Several methods have been developed to predict the rupture time of the boiler tubes in thermal power plant. However, existing life prediction methods give very conservative value at operating stress of power plant and rupture strain cannot be well estimated. Therefore, in this study, rupture time and strain prediction method accounting for creep, corrosion and heat transfer is newly proposed and compared with the current research results. The creep damage evolves by continuous cavity nucleation and constrained cavity growth. The corrosion damage evolves by steam side and fire side corrosion. The results showed good correlation between the theoretically predicted rupture time and the current research results. And rupture strain may be well estimated by using the proposed method.

Keywords

Boiler Tube;Life Prediction;Rupture Time;Rupture Strain;Creep;Corrosion

References

  1. Clark, K.J., Paterson, S.R. and WRettig, T., 1988, 'Remaining Life Assessment of Superheater and Reheater Tubes,' EPRI Report CS-5564. pp. 7-1-7-24
  2. ASME Boiler and Pressure Vessel Code: Sec. II, 1992, Materials part D-properties, p. 651
  3. Riedel, H., 1987, Fracture at High Temperature, B.Ilschner(Ed.),Springer-Verlag, Berlin, pp. 62-66
  4. Riedel, H., 1985, 'Continuous Nucleation of Grain Boundary Cavity in Creep Rupture,' ZMetallkde, Vol. 76, pp. 669-675
  5. Riedel, H., 1989, 'Life Prediction Method for Constrained Grain Boundary Cavitation,' International Journal of Pressure Vessel and Piping. Vol. 39, pp, 119-134 https://doi.org/10.1016/0308-0161(89)90042-2
  6. Viswanathan, R., Foulds, J.R. and Roberts, D. I., 1987, 'Methods for Estimating the Temperature of Reheater and Superheater Tubes in Fossil Boilers,' Conference Proceedings 'Boiler Tube Failures in Fossil Power Plants,' EPRl, pp. 3-35-3-53
  7. N.Bhamidipati, V., McIIvaine, H. and Boylan, R.J, 1987, 'Superheater and Reheater High Temperature Coal-ash Corrosion at B.L. England Generating station,' Conference Proceedings 'Boiler Tube Failures in Fossil Power Plants,' EPRI, pp. 2-199-2-215
  8. Viswanathan, R., Paterson, S.R., Grunloh, H. and Gehl, S., 1994, 'Life Assessment of Superheater/Reheater Tubes in Fossil Boilers,' Transactions of the ASME Journal of Pressure Vessel Technology, Vol. 116, pp. 1-16
  9. 문경태, 1994, '가열로 튜브의 수명예측 기법,' 대한기계학회 1994년도 Workshop, '석유 화학설비의 안전성 확보대책,' pp. 53-58
  10. 오세옥, 박인석, 강상훈, 1989, '보일러 관재료의 크리프 파단특성에 미치는 고온부식의 영향,' 대한기계학회 논문집 제13권 제2호, pp. 236-242
  11. Dyson, B.F., 1976, 'Constraints on Diffusional Cavity Growth Rates,' Metal Science, Vol. 10, pp. 349-353
  12. Riedel, H., 1987, Fracture at High Temperatures, Springer-Verlag, Berlin, Heidelberg, pp. 8-11
  13. Larson, F.R. and Miller, J., 1952, 'Time-Temperature Relationship for Rupture and Creep Stresses,' Trans. ASME, Vol. 74, pp. 765-775
  14. Zarrabi, K., 1994, 'A Comparison of Several Boiler Tube Life Prediction Methods,' International Journal of Pressure Vessel and Piping, Vol. 58, pp. 197-20 1 https://doi.org/10.1016/0308-0161(94)90084-1
  15. HK&S Inc., 1998, ABAQUS User's Manual, Version 5.8
  16. Roberts, D.I., Saxena, A. Han, J. and Banerji, K., 1988, 'Creep Crack Growth in Boiler and Steam Pipe Steels,' EPRI Report CS-5585, pp. 3-4
  17. Riedel, H., 1987, Fracture at High Temperatures, Springer-Verlag, Berlin, Hidelberg, pp. 389-390
  18. Nix, W.D., 1988, 'Mechanisms and Controlling Factors in Creep Fracture,' Materials Science and Engineering, Vol. A103, pp. 103-110 https://doi.org/10.1016/0025-5416(88)90556-3
  19. Fields, R.J., Weerasooriya, T., and Ashby, M.F., 1980, 'Fracture-Mechanisms in Pure Iron, Two Austenitic Steels, and One Ferritic Steel,' Metall. Trans. A, Vol. 11, pp. 333-347
  20. 홍성호, 1995, '재료손상과 입계 미끄럼을 고려한 증기배관의 크리프 파단수명 및 변형률 예측,' 대한기계학회논문집, 제19권, 제5호, pp. 1182-1189
  21. Calculation of boiler strength, TRD 300 Design, pp. 1-5
  22. 김재철, 김의현, 1986, '보일러 튜브 수명관리 연구,' 한국전력공사 연구 보고서, KRC-84G-S05, pp. 41-43