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Journal of Failure Analysis and Prevention

, Volume 10, Issue 3, pp 187–190 | Cite as

Investigation into the Probable Cause of Failure of Economizer Tube of a Thermal Power Plant

  • Atanu Saha
  • H. Roy
  • A. K. Shukla
Case History---Peer-Reviewed

Abstract

In this investigation, we examined the probable cause of failure of a welded joint of a economizer tube of a 210 MW thermal power plant. X-ray radiography and chemical analysis along with detailed optical and scanning electron microscopic (SEM) examination of the economizer tube were carried out. It was concluded that severe blowholes, pipings, and porosity along with brittle fracture were responsible for the failure.

Keywords

Weld Economizer tube HAZ Failure 

References

  1. 1.
    Viswanathan, R., Foulds, J.R., Roberts, D.I.: Proceedings on Boiler Tube Failures in Fossil Power Plants, vol. 10, pp. 3.35–3.53. EPRI, Palo Alto, CA (1987)Google Scholar
  2. 2.
    Viswanathan, R., Foulds, J.R.: Service experience, structural integrity, severe accidents and erosion in nuclear and fossil plants. ASME Press. Vess. Pip. 303, 187–205 (1995)Google Scholar
  3. 3.
    Viswanathan, R.: Damage Mechanisms and Life Assessment of High Temperature Components. ASM International, Metals Park, OH (1989)Google Scholar
  4. 4.
    Coleman, M.C., Parker, J.D., Welters, D.T.: Behaviour of ferritic weldments in thick section Cr–Mo–V pipe at elevated temperatures. Int. J. Press. Vess. Pip. 18, 277–310 (1985)CrossRefGoogle Scholar
  5. 5.
    Lamping, G.A., Arrowwood, R.M. Jr.: Manual for investigation and correction of boiler tube failures. Report CS-3945. EPRI, Palo Alto, CA (1985)Google Scholar
  6. 6.
    Paterson, S.R., Rettig, T.W.: Remaining life estimation of boiler pressure parts-2.25 Cr-1Mo superheater and reheater tubes. Project RP2253-5, Final Report. Electric Power Research Institute, Palo Alto, CA (1987)Google Scholar
  7. 7.
    ASM Metal Hand Book, 8th edn., vol. 7. ASM International, Metals Park, OH (1972)Google Scholar
  8. 8.
    French, D.: Metallurgical Failure in Fossil Fired Boilers. Wiley, New York (1982)Google Scholar
  9. 9.
    Das, G., Ghoshchowdhury, S., Ray, A.K., Das, S., Bhattacharya, D.K.: Failure of a superheater tube. Eng. Fail. Anal. 9, 563–570 (2002)CrossRefGoogle Scholar
  10. 10.
    ASME Boiler and Pressure Vessel Code V, 2001 Edition, 2001, Non-Destructive Examination, Article-2, pp. 21–30Google Scholar
  11. 11.
    ASME Boiler and Pressure Vessel Code VIII, Division-2, 2007 Edition, 2007, Table 7-7, pp. 7–13Google Scholar

Copyright information

© ASM International 2010

Authors and Affiliations

  1. 1.Central Mechanical Engineering Research InstituteCSIRDurgapurIndia

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