Failure Analysis of Superheater Tubes Made from Material T91 in the Boiler of a 600 MW Power Plant

Khabib Abdul Munif

Abstract


This paper highlights a study for the failure investigation of superheater tubes made of the material T-91 of a boiler in the coal-fired power plant. Two tubes are subjected to different types of failure. Visual examination, dimensional measurement, and chemical analysis are conducted as part of the study. Apart from these, the hardness test and microstructural analysis are also conducted to ascertain the possible cause of failure. The superheater tube material cracking, cavity until broken failure that occurred on the first tube was resulted in thick lip rupture and the second tube resulted in thin lip fish mouth rupture. Creep deformation, localized rapid overheating, surface tube erosion, and fly ash of coal corrosion are the main cause of tube failure. It can be avoided by regularly and according to standards cleaning the scale or deposit on the surface of the tube.

Keywords


Boiler, failure, superheater, thick lip rupture, thin lip fish mouth rupture

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References


R. Clapp, Modern Power Station Practice: Boilers and Ancillary Plant. Boilers and Ancillary Plant, Perga mon Press, 1991.

A. Movahedi-Rad, S. Plasseyed, and M. Attarian, “Failure analysis of superheater tube,” Engineering Failure Analysis, vol. 48, pp. 94–104, 2015.

G. K. Gupta and S. Chattopadhyaya, “Critical failure analysis of superheater tubes of coal-based boiler.,” Strojniski Vestnik/Journal of Mechanical Engineering, vol. 63, no. 5, 2017.

D. Jones, “Creep failures of overheated boiler, su perheater and reformer tubes,” Engineering failure analysis, vol. 11, no. 6, pp. 873–893, 2004.

A. Husain and K. Habib, “Investigation of tubing failure of super-heater boiler from kuwait desalina tion electrical power plant,” Desalination, vol. 183, no. 1-3, pp. 203–208, 2005.

B. Haghighat-Shishavan, H. Firouzi-Nerbin, M. Nazarian-Samani, P. Ashtari, and F. Nasirpouri, “Failure analysis of a superheater tube ruptured in a power plant boiler: Main causes and preventive strategies,” Engineering Failure Analysis, vol. 98, pp. 131–140, 2019.

Z. Baoyou, L. Zhonghong, C. Yuexian, and F. Xigang, “Analysis of a boiler pipe rupture,” Engineering Failure Analysis, vol. 13, no. 1, pp. 75–79, 2006.

M. Rahman, J. Purbolaksono, and J. Ahmad, “Root cause failure analysis of a division wall superheater tube of a coal-fired power station,” Engineering Fail ure Analysis, vol. 17, no. 6, pp. 1490–1494, 2010.

J. Ahmad, J. Purbolaksono, L. Beng, and A. Ahmad, “Failure evaluation on a high-strength alloy sa213-t91 super heater tube of a power generation,” Proceed ings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, vol. 224, no. 4, pp. 269–273, 2010.

P. Psyllaki, G. Pantazopoulos, and H. Lefakis, “Metal lurgical evaluation of creep-failed superheater tubes,” Engineering Failure Analysis, vol. 16, no. 5, pp. 1420– 1431, 2009.

D. Ghosh, S. Ray, A. Mandal, and H. Roy, “Failure investigation of radiant platen superheater tube of thermal power plant boiler,” High Temperature Ma terials and Processes, vol. 34, no. 2, pp. 171–175, 2015.




DOI: http://dx.doi.org/10.12962/j25807471.v4i1.6421

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