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| 1 | A- BOILER PRESSURE PARTS:Erection and dismantling of cup-lock scaffoldings |
| 2 | General Survey of Boiler Pressure Part |
| 3 | Rectification/Replacement of damaged/eroded pressure parts tubes by cutting tubes & bends |
| 4 | Build Up on eroded portion of pressure part tube size |
| 5 | Reconditioning of 4L and 4R, HRH, CRH and economizer I/L-O/L Headers. |
| 6 | Repairing / rectification / Replacement of Economizer coil with Measurements and rectification of coil pitches of economizer and also with SCW (all the Joints which may be required will be counted in Sl. No. 5(a)-Economizer coil inspection (By taking the Coils outside |
| 7 | Economizer coil inspection (By shifting the coils inside at vacant places)- |
| 8 | Fins welding of W/W, SCW & saw cut fins etc. (Both side fins welding) |
| 9 | Providing additional SS half shield or rectification of old shields in S/H Screen & Hanger tubes, Screen & hanger W/W tubes, LTSH /Economizer coils/ bends and all other areas of boiler pressure parts |
| 10 | Alignment of Horizontal & vertical Buck stay beam |
| 11 | Fabrication of tube bends ( SS bends shall remain excluded from scope) |
| 12 | B- Air Pre-heater (2 Nos) Replacement of All types of Seals with Holding Strips including seal tabs in both APH |
| 13 | Replacement of all Static seal (Along with Static Spool piece) and rotor post seal at CE &HE with repairing of seal ring segments and spool piece at HE &CE in both APH |
| 14 | Replacement of Sector Plates of HE/CE as per requirement |
| 15 | Repair & Re-installation/ Replacement of Axial Seal Plate |
| 16 | Repairing of all eroded sector plates of both APH |
| 17 | Repair of Bracing pipes in FG side with providing shield in both APH at CE & HE |
| 18 | Removal of Hot End Baskets of both APH toBoiler-0-meter elevation for repairing/Replacement & jet cleaning. |
| 19 | Removal of Cold End Baskets of both APH to Boiler-0-meter elevation for repairing/ Replacement & jet cleaning. |
| 20 | Repairing/Replacement of Diaphragm plates, damaged gratings & gratings supports for C.E. and H.E. in both APH |
| 21 | Repairing work of APH Shell/ Partition Plate/Center Section etc. by replacing plate for both APH along with rotor shell run out checking and correction |
| 22 | Leveling of all sector plates CE &HE of both APH. Adjustment of axial seal plates APH. Rotor leveling of Both APH. Sealing of adjusters of sector plates of HE & CE and Replacement of Axial seal plate adjuster assembly in both APH- |
| 23 | Inspection and servicing of support bearing assembly and Bearing Housing levelling of both APH |
| 24 | Checking, inspection and servicing of Guide bearing and its components (Seal Tube, Air Seal Housing, Guide Trunnion etc.) &servicing of lube oil system & all its components of both APH |
| 25 | Checking of drive unit including servicing of gear box, fluid coupling, air motor and servicing/repairing/replacement of both APH soot blowers |
| 26 | Repairing of Expansion Bellows of PA/SA/FG Duct |
| 27 | Cleaning of washing nozzle of Air Pre-heater |
| 28 | Repairing/rectification and tightening of all hangers support/ Tie rods of SA/PA/FG Ducts |
