Failure Analysis of a 9–12%Cr Steel Superheater Tube

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
E. Pour saeidi ◽  
M. Aieneravaie ◽  
M. R. Mohammadi Arhani
Keyword(s):  
Failure Analysis ◽  
Chromium Steel ◽  
Steel Tubes ◽  
Steam Power ◽  
Final Fracture ◽  
Superheater Tube ◽  
Load Carrying ◽  
Power Plant Boiler ◽  
Electron Microscopes ◽  
Plant Boiler

The failure analysis of 9–12% chromium steel tubes, containing about 2.5% molybdenum, is discussed in the present study. The component is used in a steam power plant boiler as a high-temperature superheater tube and has been in service for about 100,000 h. The failure occurred without appreciable wall thinning. Specimens were taken from the region beneath the fracture surface and investigated by optical and electron microscopes. The microstructure was composed of ferrite and grain boundary particulate carbides. The results indicated that the fracture was initiated because of the bending of the tube near the anchor and propagation of the crack through the interfaces between massive carbides and matrix (sensitized zone). Final fracture has occurred as a result of an overload due to the decreasing of load carrying section produced by crack propagation.

Failure analysis of a superheater tube ruptured in a power plant boiler: Main causes and preventive strategies

2019 ◽  
Vol 98 ◽  
pp. 131-140 ◽  
Author(s):  
Babak Haghighat-Shishavan ◽  
Hossein Firouzi-Nerbin ◽  
Masoud Nazarian-Samani ◽  
Pooria Ashtari ◽  
Farzad Nasirpouri
Keyword(s):  
Power Plant ◽  
Failure Analysis ◽  
Preventive Strategies ◽  
Superheater Tube ◽  
Power Plant Boiler ◽  
Plant Boiler

Failure Analysis of PRDS Pipe in a Thermal Power Plant Boiler

2016 ◽  
Vol 99 (2) ◽  
pp. 233-238 ◽  
Author(s):  
Debashis Ghosh ◽  
Subrata Ray ◽  
Jiten Mandal ◽  
Nilrudra Mandal ◽  
Awdhesh Kumar Shukla
Keyword(s):  
Power Plant ◽  
Failure Analysis ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Power Plant Boiler ◽  
Plant Boiler

Failure analysis of power plant boiler material

2004 ◽  
Vol 4 (2) ◽  
pp. 73-77 ◽  
Author(s):  
J. H. Ai ◽  
H. Y. Lin ◽  
Y. X. Qi
Keyword(s):  
Power Plant ◽  
Failure Analysis ◽  
Power Plant Boiler ◽  
Boiler Material ◽  
Plant Boiler

Failure Investigation of Radiant Platen Superheater Tube of Thermal Power Plant Boiler

2014 ◽  
Vol 0 (0) ◽  
Author(s):  
D. Ghosh ◽  
S. Ray ◽  
A. Mandal ◽  
H. Roy
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Metallographic Analysis ◽  
Premature Failure ◽  
Superheater Tube ◽  
Power Plant Boiler ◽  
Super Heater ◽  
Cause Of Failure ◽  
Plant Boiler

AbstractThis paper highlights a case study of typical premature failure of a radiant platen superheater tube of 210 MW thermal power plant boiler. Visual examination, dimensional measurement and chemical analysis, are conducted as part of the investigations. Apart from these, metallographic analysis and fractography are also conducted to ascertain the probable cause of failure. Finally it has been concluded that the premature failure of the super heater tube can be attributed to localized creep at high temperature. The corrective actions has also been suggested to avoid this type of failure in near future.

Power Plant Boiler Failure Analysis of Main Components

2014 ◽  
Vol 945-949 ◽  
pp. 1073-1076 ◽  
Author(s):  
Hong Liang Xia
Keyword(s):  
Power Plant ◽  
Failure Analysis ◽  
Analysis Method ◽  
Power Plant Boiler ◽  
Boiler Operation ◽  
Main Components ◽  
Power Station Boiler ◽  
Failure Types ◽  
Plant Boiler

This paper briefly introduces the basic condition of power station boiler operation and failure analysis of the necessity of power plant boiler failure types and main components of power plant boiler failure types of main components. Illustrates the failure analysis of the main analysis method, and introduces the failure analysis of the role of failure analysis.

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