Ghosh, D. and Ray, S. and Roy, H. and Mandal, N. and Shukla, A.K. (2015) High-Temperature Graphitization Failure of Primary Superheater Tube. High Temperature Materials and Processes, 34 (8). pp. 777-781. ISSN 0334-6455

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Abstract

Failure of boiler tubes is the main cause of unit outages of the plant, which further affects the reliability, availability and safety of the unit. So failure analysis of boiler tubes is absolutely essential to predict the root cause of the failure and the steps are taken for future remedial action to prevent the failure in near future. This paper investigates the probable cause/causes of failure of the primary superheater tube in a thermal power plant boiler. Visual inspection, dimensional measurement, chemical analysis, metallographic examination and hardness measurement are conducted as the part of the investigative studies. Apart from these tests, mechanical testing and fractographic analysis are also conducted as supplements. Finally, it is concluded that the superheater tube is failed due to graphitization for prolonged exposure of the tube at higher temperature.

Item Type:	Article
Subjects:	Failure
Depositing User:	Dr. Sarita Ghosh
Date Deposited:	14 Sep 2016 06:34
Last Modified:	14 Sep 2016 06:34
URI:	http://cmeri.csircentral.net/id/eprint/231

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