Combustion Service

We repair fuel nozzles, combustion liners, transition pieces and all associated hardware for Turbine We must know about work scope. 

Work Scope For Service And Repair:

A)  TRANSITION PIECES

• Receive parts and record serial numbers.
• Incoming dimensional inspection.
• Remove floating seals.
• Aluminum oxide blast clean transition pieces to remove existing coatings.
• NDT inspect transition piece bodies.
• Defect Map the location and dimension of all cracks and wear.
• Inspect the condition of transition piece body.
• Place transition piece in functional fit fixture; measure and record any creep deflection .
• Grind out any cracks or indications.
• Pre-weld solution heat treatment.
• Remove picture frame from transition piece body if required.
• Dimensionally inspect; measure and record forward end roundness.                                    
• NDT inspect transition piece bodies.
• Weld repair transition piece bodies.
• Install new picture frames on transitions.
• Upgrade picture frame sealing slot using hard face sheet stock inlays.
• Remove & replace “H” blocks if required.
• Dress forward ring in way spring seal wear.
• Plasma spray stellite coating to inlet end.
• Apply TBC full coating to transition pieces.
• Install new floating seals, weld retainers.
• Package for shipment.
• Prepare repair report and forward to customer.

      B)    Combustion Liners

• Receive in and verify serial numbers.
• Perform visual inspection and record findings.
• Match mark and remove cowl caps
• Abrasive blast to remove coating if required
• Perform Fluorescent Penetrant Inspection and defect map
• Visual / dimensional inspection
• Forward inspection results to customer detailing repair recommendations.
• Remove cross fire collars and hula skirts as required.
• Remove areas showing excessive amounts of erosion or frettage.
• Repair eroded or fretted areas by welding and/or sectional replacement.
• Weld repair cracking on liner body as required.
• Weld repair or replace liner stops.
• Repair Fuel Nozzle Bores by blending or welding and machining.
• Visual inspect components to ensure conformity.
• Perform FPI on completion of repairs.
• Perform dimensional inspection.
• Apply TBC coating to liner body and cowl cap if required
• Refit cowl cap to liner body and weld cap pins in place.
• Perform final visual / dimensional inspection.