Gas Turbine Repair Technology

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 Unit availability and effective utilization of maintenance funds are two of the most important concerns of a gas turbine owner/operator. Major gas turbine components have limited lives in comparison to the unit’s useful life. Owners/operators are continually faced with decisions regarding component replacement and/or repair. A component repair program that minimizes maintenance costs and maximizes equipment availability can be instituted within the installed base to meet or improve financial objectives. This paper summarizes some of the state-of-the-art gas turbine component repair processes developed by GE to support the fleet of GE-designed heavy-duty gas turbines.

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TOPICS COVERED INSIDE THE BOOK

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Abstract

Operation and Maintenance Considerations

Repair vs. Replacement 

Component Repairs

Nozzles

Stage One Nozzle

Activated Diffusion Healing: Distortion-Free Nozzle Restoration

Nozzle Modifications 

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Stages Two and Three Nozzle Repair

Advanced Bucket Repair

Rotors

Combustion Hardware

Combustor

Transition Pieces 

Fuel Nozzles

Component Enhancement 

Extendor™ 

Coatings 

Compressor Corrosion Protection

Turbine Corrosion/Oxidation 

Thermal Barrier Coatings

Service Background 

Summary.

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