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Combustion Turbine Inspection Services

Power Services Group (PSG) executes combustion inspections, hot gas path inspections, and major inspections on combustion turbine generators all over the World. PSG provides total turnkey outage performance including technical direction, project management, coordination, supervision, labor, tooling, and start-up support. We provide combustion turbine services on the following unit types:

OEM Combustion Turbine Type
General Electric Frame 3, 5, 6, 6B, 7, 7B, 7E, 7EA
Westinghouse 251AA, 251B, 301G
Alstom GT8, GT11

 

Contact Us today to learn how we can help you with your next combustion turbine inspection.

 

 

 

Westinghouse 251B Gas Turbine Inspection

We were recently contracted to perform a modified Combustion Inspection on a Westinghouse 251B Gas Turbine by a customer in the United States.  Below is a summary of the activities we completed during this inspection.  All activities were completed with an attention to safety, and our quality processes, to ensure a successful outage completion.

Upon arrival for setup of tools the unit was shut down and locked out to perform the inspection. The necessary roof sections were removed for crane access to disassemble the components. All combustion parts were removed and replaced with new/refurbished during the inspection – pilot nozzles, support housings, baskets and transition pieces.

During this outage, the upper half compressor case was removed for the inspection of the R1 – R7 in the compressor section.

During this inspection, due to the condition of the compressor it was decided to remove two bottom R-1 vanes (#21 & #22) for a visual inspection and then reinstall.

The inlet access door was removed for inspection of the inlet scroll and the Inlet Guide Vanes. The Inlet Guide Vane angles were checked and verified. The row #1 compressor blade tip clearances were also checked. The Inlet Guide Vanes were greased after inspection. The inlet was cleaned and visually inspected by the plant personnel and our Technical Field Advisor prior to closing.

The exhaust was opened, and the bullet cone inspection cover was removed for inspection of the exhaust bearing pedestal. The exhaust struts were inspected, and cracks were repaired as needed by the site welding contractor.

The end result was another successful turbine inspection – zero safety incidents, quality work, and an on-time and on-budget outage completion.

Frame 7B Combustion Inspection

PSG mobilized a Technical Field Advisor, Foreman, Turbine Mechanics, and Tooling to a Utility site in the southern U.S. to perform a combustion inspection ‘’CI’’ on a GE MS-7000B combustion turbine.

The job consisted of removing and replacing all combustion parts and associated consumables. The fuel nozzles, combustion liners and transition pieces were removed and replaced with OEM refurbished components.

The bullhorns, combustion chambers, crossfire tubes, retainer clips and lid covers were returned to service with no replacement necessary. Transition piece hardware was replaced with new parts and the crossfire tubes and retainer clips were returned to service with minor wear being noted. All associated flange gaskets were replaced with new OEM consumable parts in all 10 combustion cans as a preventive maintenance practice. New flange bolting hardware was also installed as a preventive maintenance practice.

The combustion wrapper was removed to better access the transition pieces and have a better visual inspection of the 1st stage nozzle, all wrapper case bolting was replaced with new upgraded components.

The inlet was visually inspected and found to be in overall good visual condition.

A visual inspection of the exhaust plenum showed the assembly to be in overall good visual condition with minor wear noted.

The end result was another successful combustion inspection on a Frame 7B combustion turbine, and most importantly, a satisfied customer.