Annexure - I (4 pages)to RFQ: 12000270-HA-46002/MVN

Refurbishment of Frame- 5 Gas Turbine Components

Scope of Job

The following items which will be removed from Gas turbines - 3, 4, 5 & 6 during the forthcoming annual combustion Inspection are required to be refurbished for using them during next Inspection/ overhaul / emergency.

Item No: / Item Description / GE Part Nos. / Unit / Qty.
1 / Refurbishment of Fuel Nozzle Assemblies of Fr-5 GTGs (Set of 10 Nos.) / 149D2986G008 / Set / 4
2 / Refurbishment of Cap & Liner Assemblies of Fr-5 GTGs / 224B9793G006 (8 nos.) 224B9793G007 (16 nos.)
224B9793G008 (4 nos.) 224B9793G0014 (4 nos.)
224B9793G0015 (8 nos.) / Each / 40
3 / Refurbishment of Crossfire Tubes for Fr-5 GTs / 306A4456G001 / Each / 40
4 / Refurbishment of Retainers, Crossfire Tubes of Fr-5 GTs, / 919B0310P001 / Each / 80
5 / Refurbishment of Transition piece assemblies of Fr-5 GTGs (Set of 10 Nos.) / BHEL Part No: 35109000 / Set / 1

For refurbishment of above mentioned item no.1, the following spares item nos. 6 to 12 are required and for refurbishment of item no. 2(combustion liners) the spare item no. 13 is required based on the condition of individual components. Agency has to replace the below mentioned spares while refurbishment, after obtaining necessary confirmation from HPCL.

Sl.
No. / Item Description / Unit
6 / Supply of Retainer BHEL Part No. 35406019 - For Fuel Nozzle Assemblies of Fr-5 GTs / Each
7 / Supply of Pilot BHEL Part No. 35406022 - For Fuel Nozzle Assemblies of Fr-5 GTs / Each
8 / Supply of Tip Fuel Nozzle BHEL Part No. 35406023 - for Fuel Nozzles of Fr-5 GTs / Each
9 / Supply of Cap Fuel Nozzle BHEL Part No. 35406015 - For Fuel Nozzles of Fr-5 GTs / Each
10 / Supply of Transition Piece BHEL Part No. 35406016 - For Fuel Nozzles of Fr-5 GTs / Each
11 / Supply of Chamber Swirl BHEL Part No. 35406018 - For Fuel Nozzles of Fr-5 GTs / Each
12 / Supply of Liquid Port "T" Connector for Fuel Nozzles of Fr-5 GTs / Each
13 / Supply of Hula Seal for Cap & Liner Assemblies of Fr-5 GTs / Each

Note: The exact quantities for the above spare Item Nos. 6 to 13 will be known only after dismantling, cleaning and inspection of the item Nos. 1 & 2 (Fuel Nozzle Assemblies and Cap & Liner Assemblies of Fr-5 GTGs). Hence, quantities for the spares are not mentioned.

Scope of job for Item No 1 (Refurbishment of Fr-5 Fuel Nozzle assembly)

  1. After receipt of the Fuel nozzle assemblies to agency’s work, agency to perform incoming inspection.
  2. To carry out existing ‘as it is’ flow testing of the fuel nozzles.
  3. Dis-assemble the fuel nozzle assemblies and carryout pressure testing of the fuel nozzle body.
  4. Clean the fuel nozzle body & its internals to remove the deposits.
  5. Carry out Visual inspection, dimensional inspection & Dye-penetrant inspection of nozzle body and its internal parts and accordingly report the same to the HPCL concerned authority.
  6. Carryout weld repairs of worn out areas on Gas tip collars and subsequently machine the same to required dimensions.
  7. Carry out fuel nozzle assembly along with internals (Replace with new internals as identified based on incoming inspection)
  8. Apply required torque during assembly as per the specifications mentioned in the drawings.
  9. After Fuel nozzle assembly, perform the pressure testing & flow testing of the fuel nozzles.
  10. Arrange the fuel nozzles to meet the range as mentioned in the drawings & punch mark the fuel nozzle location number on the fuel nozzles itself for easy identification during installation at site. Also the punched marked location to be carried out at one same location for the whole set of fuel nozzle assembly & the location to be intimated in the soft copy report.

11.  Carryout stacking of the lock plate to the fuel nozzle body and gas tips.

  1. Apply thermal resistant paint.
  2. Preserve the Nozzle assemblies, pack for shipment & submit the final report in Soft copy form.

Note: During refurbishment of the fuel nozzles, Gasket with BHEL Part No. 35406020 &

Locking Plate with BHEL Part No. 35406013 are to be replaced free of cost by the Agency.

Scope of job for Item No 2 (Refurbishment of Fr-5 Combustion liners)

  1. After receipt of the Combustion liners to agency’s work, agency to perform incoming inspection and carry out the dimensional checks of the combustion liners.
  2. Disassemble the combustion liners, caps and perform grit blast cleaning of the liners.
  3. Perform NDT on combustion liners.
  4. Grind out weld cracks on liner body and subsequently carry out weld repair of cracks and worn out areas on liner body.
  5. Carry out weld repairs of worn portions on liner stoppers.
  6. Blend the liner stoppers to meet the required dimensions mentioned in the drawing.
  1. Carryout weld repairs / replace the cross fire tube collars.
  2. Blend cross fire tube collars to meet the required dimensions.
  3. Repair / replace the spring seals (Hula seals).
  4. Check & correct the distortion on the liner body, in line with the drawing specifications.
  5. Carry out weld repairs of worn fuel nozzle collars and blend the collars to meet the required dimensions.
  6. Check & correct the distortion on cowl caps.
  7. Carry out dimensional inspection, NDT inspection of liners & caps.
  8. Carry out weld repairs if any observed during inspection.
  9. Carry out final grit blasting.

16.  Apply TBC (Thermal Barrier coating) to liner body.

  1. Re-fix caps with new pins.
  2. Carryout final thorough cleaning, ensure complete removal grit blast material, Q & A inspection, preserve the liners, pack for shipment & submit the final report in Soft copy form.

Scope of job for Item No 3 (Refurbishment of Fr-5 Cross fire tubes)

  1. After receipt of the Cross fire tubes to agency’s work, agency to perform incoming inspection.
  2. Carry out grit blast cleaning of cross fire tubes.
  3. Carry out visual inspection, dimensional inspection and NDT inspection on the cross fire tubes.
  4. Carry out grinding to remove the cracks and subsequently carry out weld repairs of cracks and wornout areas.
  5. Blend weld-ments to meet the drawing specifications & correct contours.
  6. Perform Dye penetrant test, carry out final grit blast cleaning.
  7. Carryout final thorough cleaning, ensure complete removal grit blast material, Q & A inspection, dimensional inspection, preserve the cross fire tubes, pack for shipment & submit the final report in Soft copy form.

Scope of job for Item No 4 (Refurbishment of Fr-5 Retainers)

  1. After receipt of the Cross fire tube retainers to agency’s work, agency to perform incoming inspection.
  2. Carry out grit blast cleaning of retainers.
  3. Carry out visual inspection, dimensional inspection and NDT inspection on the retainers.
  4. Carry out grinding to remove the cracks and subsequently carry out weld repairs of cracks and worn-out areas.
  5. Blend weld-ments to meet the drawing specifications & correct contours.
  6. Straighten the bent retainers.
  1. Perform Dye penetrant test, carry out final grit blast cleaning.
  2. Carryout final thorough cleaning, ensure complete removal grit blast material, Q & A inspection, dimensional inspection, preserve the cross fire tubes, pack for shipment & submit the final report in Soft copy form.

Scope of job for Item No 5 (Refurbishment of Fr-5 Transition pieces)

  1. After receipt of the Transition pieces to Agency’s work, Agency to perform incoming inspection and carryout dimensional checks of transition pieces.
  2. Remove the old seals from Transition piece body and carry out grit blasting
  3. Perform visual inspection, NDT inspection and subsequently carryout necessary weld repairs of inner, outer and side seal slots.
  4. Carry out weld repairs of worn out areas at aft area, weld repairs of cracks on TP body and weld repairs of forward supports.
  5. Blend weld-ments to match the dimensions & contours as mentioned in the drawing
  6. Check and correct the creep deflection and perform all other dimensional checks.
  7. Carryout Dye penetrant test for Transition pieces and check the dimensions.
  8. Carryout thorough cleaning and ensure complete removal aluminum oxide power.
  9. Perform weld repair / replace floating seals as required and assemble the Transition pieces with seals.
  10. Carryout final Q & A inspection, preserve the segments, pack for shipment & submit the final report in Soft copy form.