CATEGORY: TURBOMACHINERY
25th International Congress on Condition
Monitoring and Diagnostic Engineering, Journal of Physics: Conference Series
Volume 364, 2012 J. Phys.: Conf. Ser. 364
Risk
assessment of failure modes of gas diffuser liner of V94.2 siemens gas turbine
by FMEA method
H Mirzaei Rafsanjani and A Rezaei Nasab
mirzaei.hesam@mapnaturbine.com
rezaei.alireza@mapnaturbine.com
Mapna Turbine Engineering & Manufacturing Company (TUGA), Mapna Building,
No. 231, Mirdamad Ave, Tehran 191895365, Iran- P. O. Box: 15875-5643
Abstract
Failure
of welding connection of gas diffuser liner and exhaust casing is one of the
failure modes of V94.2 gas turbines which has occurred in some power plants.
This defect is one of the concerns of customers which must be addressed before they
are willing to accept the final commissioning of this product. Accordingly, the
risk priority of this failure was evaluated by failure modes and effect
analysis (FMEA) method to find out whether this failure is catastrophic for
turbine performance and is harmful to humans.
By using history of 110 gas turbines of this model which are used in
some power plants, the severity number, occurrence number and detection number
of failure determined and consequently the Risk Priority Number (RPN) of
failure determined. Finally, critically matrix of potential failures is created
and illustrated that failure modes are located in safe zone
Free Full Text Source: http://iopscience.iop.org/1742-6596/364/1/012137
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