Failure Analysis of PRDS Pipe in a Thermal Power Plant Boiler

The pressure reducer desuperheater (PRDS) pipeline is used for reducing the pressure and desuperheating of the steam in different auxiliary pipeline. When the PRDS pipeline is failed, the reliability of the boiler is affected. This paper investigates the probable cause/causes of failure of the PRDS...

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Bibliographic Details
Published in:Journal of the Institution of Engineers (India) Series C 2018-04, Vol.99 (2), p.233-238
Main Authors: Ghosh, Debashis, Ray, Subrata, Mandal, Jiten, Mandal, Nilrudra, Shukla, Awdhesh Kumar
Format: Article
Language:English
Subjects:
Aerospace Technology and Astronautics
Boilers
Case Study
Chemical analysis
Engineering
Failure analysis
Graphitization
Hardness measurement
Industrial and Production Engineering
Mechanical Engineering
Mechanical tests
Pipe
Pipelines
Steam electric power generation
Thermal power plants
Thickness measurement
Wall thickness
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Summary:The pressure reducer desuperheater (PRDS) pipeline is used for reducing the pressure and desuperheating of the steam in different auxiliary pipeline. When the PRDS pipeline is failed, the reliability of the boiler is affected. This paper investigates the probable cause/causes of failure of the PRDS tapping line. In that context, visual inspection, outside diameter and wall thickness measurement, chemical analysis, metallographic examination and hardness measurement are conducted as part of the investigative studies. Apart from these tests, mechanical testing and fractographic analysis are also conducted as supplements. Finally, it has been concluded that the PRDS pipeline has mainly failed due to graphitization due to prolonged exposure of the pipe at higher temperature. The improper material used is mainly responsible for premature failure of the pipe.
ISSN:2250-0545
2250-0553
DOI:10.1007/s40032-016-0252-y