Mechanical Maintenance Of Aph, Esp, Various Ducts & Dampers Installed In Bmd-I, Dtps, Anpara Along With External Cleaning Of Boiler-2 Opening Of All The Access Doors Of Aph He &Ce For Inspection & Execution Of The Work & Closing Them After Completion Of Work Byapplying Hold It & Replacing Old Asbestos Rope With New One. 3 Providing Temporary Scaffolding At He / Ce For Inspection & Execution Of Works And Removal Of The Same After Completion Of Work. 4 Servicing Of Lub Oil System Of Guide / Support Bearing Of Aph. One Job Includes One Lub Oil System Of Guide / Support Bearing Of Aph. 5 Servicing Of Rotor Drive Unit Of Aph. One Job Includes One Drive Of Aph. 6 Revisioning / Replacement & Resetting Of He / Ce Inboard, Interm & Outboard Radial Seals Of Aph 7 Revisioning / Replacement & Resetting Of Bypass Seals Of Aph - Cold End 8 Revisioning / Replacement & Resetting Of Bypass Seals Of Aph - Hot End 9 Revisioning / Replacement & Resetting Of Axial Seals Of Aph - Hot End 10 Revisioning / Replacement & Resetting Of Axial Seals Of Aph - Cold End 11 Revisioning / Replacement & Resetting Of Rotor Post Seals Of Aph - Hot End 12 Revisioning / Replacement & Resetting Of Rotor Post Seals Of Aph - Cold End 13 Repairing / Replacement Of Seal Ring Segment Of Aph - Hot End 14 Repairing / Replacement Of Seal Ring Segment Of Aph - Cold End 15 Repairing / Replacement Of Static Seal Plate Of Aph - Hot End 16 Repairing / Replacement Of Static Seal Plate Of Aph - Cold End 17 Servicing Of Air Motor Ofaph 18 Alignment Of Rotor Drive Unit With Electric / Air Motor Of Aph 19 Servicing / Repairing Of Single Nozzle Cleaning Device & Checking Of Its Travel Ofaph 20 Cleaning Of Aph Heating Element In Situ Cond. With The Help Of Water / Air Jet 21 Replacement / Repairing Of Eroded / Damaged Bracing Pipes Ofaph 22 Repairing Of Expansion Joints / Strengthen Of Old Welding Of Duct From Flue Gas / Air Inlet Damper To Flue Gas / Air Outlet Dampers Of Aph. 23 Revisioning / Repairing Of Air Seal Housing Of Aph 24 Repairing Of Manholes Of Aph 25 Repairing Of Eroded Casing Of Aphs. 26 Checking Of Fire Fighting / Water Washing Pipe & Replacement / Blanking Of Eroded Nozzles Of Aph Hot End. It Also Includes The Removal Of Chocking Of The Pipe & Patching Over Eroded Portion. 27 Checking Of Fire Fighting / Water Washing Pipe & Replacement / Blanking Of Eroded Nozzles Of Aph Cold End. It Also Includes The Removal Of Chocking Of The Pipe & Patching Over Eroded Portion. 28 Replacement Of Oil Seals Of The Drive Shaft Of The Rotor Drive Unit Of Aphs 29 Removal Of Scrap Material From Ash Hopper Of Aph 30 Reclamation / Repairing / Conversion Of Worn Out Basket Of Aph.Hot End & Intermediate. 31 Fabrication & Erection Of Plate Forms / Structures For Facilitating The Various Running And Breakdown Maintenance Works Of Air Pre-Heaters. 32 Replacement / Repairing / Adjustment Of Adjuster Bolt Of Axial Seal Plate / Radial Sector Plate Of Aph 33 Fixing Of Sealing Bar & Sealing Strip Over Hot End Baskets Of Aph 34 Straightening & Repairing Of Bent Diaphragm Of Aph 35 Replacement / Repairing Of Eroded T Bar Of Aph 36 Servicing Of Gv / Nrv / Plate Valve Associated With Aph And Its Auxiliaries 37 Removal Of Choking Of Ash Hoppers Of Aph 38 Removal Of Ash Accumulated Over The Space In Between The Rotor Shell And Aph Outer Body Shell. 39 Alignment Of Rotor Level Of Aph 40 Rectification Of Bulged / Damaged Rotor Shell Segment And Alignment Of Pin Rack Of Aph 41 Servicing / Replacement Of Gear Box , Counterweight & Related Accessories Of Single Nozzle Cleaning Device Of Aph 42 Servicing / Replacement Of Lub Oil Pump Of Guide / Support Bearing Of Aph. 43 Modification In Air Heater Water Washing Line Of Aph ( He / Ce ) / Lube Oil Lines 44 Replacement / Repairing Of Damaged Rotor Angle / Bypass Angle Of Aph 45 Replacement / Repairing Of Fluid Coupling Of Main Drive Motor And Gear Box Of Aph 46 Servicing Of Gate And Damper Sealing Blowers Of Pa / Sa / Flue Gas Including Its Duct 47 Dismantling And Lowering Of Aph Hoist Trolley From Its Position And After Completion Of Work, Lift It & Assemble It To The Same Position. 48 Water Washing And Cage Repairing Of Aph Basket Which Are Taken Out During O / H Of Unit 7 49 Duct And Dampers 50 Servicing / Revisioning Ofprimary Air / Secondary Air Dampers Before / After Aph, Scaph I / O Damper And Flue Gas Damper After Aph. 51 Maintenance Of Gates Offlue Gas Inlet To Aph, Esp Inlet And Esp Outlet 52 Local Operation Of Flue Gas Inlet Gate, Esp Inlet / Outlet Gate. 53 Fabrication Offlue Gas Distribution Flap To Aph Outlet 54 Repairing / Replacement Of Eroded Flaps Of Flue Gas, Primary And Secondary Air Dampers. 55 Repairing / Replacement Of Eroded Stainless Steel Shafts Of By-Plane Dampers. 56 Cleaning Of Aerofoil Of Secondary Air Duct To Wind Box 57 Checking And Repairing Of S.S. Coal Nozzle Tip, Splitter Plate Of Coal Nozzle Assbly. / Air Compartment Assbly / Oil Compartment Assbly. From Inside The Furnace ( In- Situ ) And Application Of Refractory If Found Damaged At Splitter Plate. 58 Inspection Of Boiler Drum Internals And Rectification Of Defects Observed. D.P. Testing Of Shell Joints To Check For Any Crack And Its Repair By H.P. Welding, When Only 10 Nos. Turbo Separators Are Taken Out / Replacement Of Manhole Gasket And Its Tightening To Ensure Zero Leakage. 59 Servicing Of Spring Hanger Supports, Hydraulic Supports, Anchors & Restraints Of Boiler Piping & Ducts And Resetting On Cold Set Values. 60 Repairing Of Flue Gas / Primary / Secondary Air Ducts By Providing M.S. / Carbon Steel Plates Over Eroded Portion And Welding With Suitable Electrode. 61 Repairing Of Metallic Expansion Joints Before / After Aph And Wind Box . 62 Repairing Of Non Metallic Expansion Jointsbefor And After Esp. 63 Welding Of Various Ducts To Arrest Leakage Of Air / Flue Gas. 64 Repairing / Replacement Of Bracing Of Flue Gas Up To Id Fan Inlet Ad Secondary Air Ducts From Aph Outlet To Wind Box. 65 Servicing Of Scanner Air Fan. 66 Fabrication And Erection Of Temporary Structures At Different Floors Of 500 Mw Boilers 67 Esp Maintenance 68 Cleaning Of Complete Structure, Electrodes, Shock Bar, Rapping Mechanism & Hoppers From Inside Of Esp Of One Field By Wire Brush, Hard Broom And Old Cloth. 69 Removal Of Scrap, Debris And Ash From Esp Ash Hoppers. 70 Cleaning & Removal Of Ash / Dust From Support Insulator By Fine Cloth. 71 Repairing Of Bent Collecting Electrodes In Esp Chamber In Fix Position. 72 Removal Of Damaged Emitting Electrode And Fixing The New Emitting Electrode. 73 Servicing / Repairing / Replacement Of Rapping Hammer In Esp Chamber. 74 Repairing / Replacement Of Shock Bar By Cutting Huck Bolts, Removal From The Collecting Electrodes And Re Fixing The Same On Shock Bar After Repairing Of Shock Bar Its Alignment To Have Equal Gap On Both Sides In Esp Chamber. 75 Repairing / Re Fixing Of Deflector Plates On Gas Distribution Screen. 76 Repairing Of Eroded Portion By Welding In Ash Hopper, Esp Roof And Other Places Inside And Outside Of The Esp Chamber. 77 Repairing / Re Erection Of New Ash Deflector Plate As Per Size From M.S. Plate Of Appropriate Thickness With The Help Of Gas Cutting And Welding. 78 Inspection And Checking Of Esp Field And Removal Of Minor Defects. 79 Replacement Of Asbestos Rope Of Esp Hopper Manhole, Casing Manhole And Top Manhole 80 Changing Of Damaged Support Insulator. 81 Repairing Of Support Insulator Screen Pipe Inside The Esp Chamber. 82 Alignment Of Disturbed Emitting Structure By Opening All The Cover Plates Of Support Structure. Lifting The Emitting Structure About 50 Mm After Loosing All The Nuts Of The Structure Suspension Rod And Then Restoring The Cover Plates And Loosened Nuts After Alignment. 83 Replacement Of Plane Bearing Of Rapping Mechanism. 84 Repairing / Replacement Of Shock Bar Guide ( Front / Rear ) And Shock Bar Guide Attachment By Welding Or Grinding Wherever Required. 85 Repairing / Replacement Of Pin Wheel Of Emitting Electrode Rapping Mechanism. 86 Fixing Of” U” Clamp / “U” Guide By Welding On Collecting Electrodes At Appropriate Places. 87 Servicing / Replacement Of Vertical Shaft Bearing Of Emitting Electrodes Raping Mechanism & Alignment Of Vertical Shaft. 88 Re Fixing Of „U? Guide / „U? Clamp By Welding On Collecting Electrode Plate. 89 Changing Of Damaged Shaft Insulator. 90 Cleaning And Removal Of Ash / Dust From Shaft Insulator By Fine Cloth. 91 Repairing Of Bracings Between Esp Inlet Gate And Gd Screen And Rear Side Of Esp By Providing Patch At Eroded Area Or Changing New Piece By Bracing Pipe As Per Size. 92 Replacement / Repairing Of Cerm Shaft. 93 Replacement / Repairing Of Gdrm Shaft. 94 Replacement / Repairing Of Eerm Shaft. 95 Repairing Of Emitting Frame By Patch Welding. 96 Fabrication / Repairing Of Eerm Manhole. 97 Fabrication / Repairing Of Casing Manhole Of Esp. 98 Repairing / Replacement Of Shock Pads. 99 Replacement Of Primary / Secondary Screen Of Gdrm. 100 Repairing / Re Fabrication Of Support Of Duct Plate At Esp Inlet. 101 Replacement Of Asbestos Rope Of Esp Shaft Insulators Cover. 102 Replacement / Re-Erection Of Damaged Double Gear Boxes Of Motor Of Eerm. 103 Replacement / Re-Erection Of Damaged Double Gear Boxes Of Motor Of Cerm / Gdrm. 104 Repairing Of Damaged Rapping Gear Box. 105 Servicing Of Rapping Gear Box Coupling Bearing Block. 106 Repairing Of Outer Arms-I. 107 Repairing Of Outer Arms -Ii For Esp. 108 Repairing Of Pin Wheel Arrangement –I Of Esp. 109 Repairing Of Pin Wheel Arrangement –Ii Of Esp. 110 Repairing / Reclamation Of Grip Coupling Of Eerm Of Esp. 111 Repairing Of Shaft Insulators Attachments Of Eerm Of Esp. 112 External Cleaning Of Boiler Unit No. 6 & 7 Both 113 Cleaning Ofstairsand Railingofboiler 0 Meter To 9.35 Meterfrom S1l-S1r ( First Raw Of Boiler Column ) To S21l-S21r 114 Cleaning Of Complete Boiler 9.35 To 18.65 Meter Floors From S1l-S1r ( First Raw Of Boiler Column ) To S21l-S21r Including Stairs , Railing & Interconnecting Gallery From Tg Floor. 115 Cleaning Of Complete Boiler Area ‘18.65 To 27.25’ Meter Floorsincluding Interconnecting Gallery From Tg Floor, Stairs, Railings , All Oil Skids & Fuel Oil ( Hfo / Ldo ) Station. 116 Cleaning Of Complete Boiler Area ‘27.25 To 36.7’ Meter Floors Includingstairs, Railings, Interconnecting Gallery From Tg Floor, All Oil Skids & Fuel Oil ( Hfo / Ldo ) Station . 117 Cleaning Of Complete Boiler Area ‘ 36.7 To 46.20’ Meter Floors Including Stairs, Railings, All Oil Skids & Fuel Oil ( Hfo / Ldo ) Station . 118 Cleaning Of Complete Boiler Area ‘46.20 To 55.35’ Meter Floors Including Stairs, Railings. 119 Cleaning Of Complete Boiler Area ‘55.35 To 64.8’ Meter Floors Including Stairs, Railings. 120 Cleaning Of Complete Boiler Area ‘64.8 To 74.5’ Meter Floors Including Stairs, Railings. 121 Cleaning Of Complete Boiler Area ‘74.5 To 80.71’ Meter Floors Including Stairs, Railings. 122 Cleaning Of 80 Nos.Of Fuel Inlet Elbows & Coal Gates Near Burner Blocks At 21.00 To 46.00 Mtr 123 Outside Cleaning Of Ducts Connecting Aph Outlet To Wind Box . 124 Cleaning Of Various Plate Form , Stairs, Hand Railings, Structure For Gas Ducts Connecting Aph Outlet To Esp’S Inlet. 125 Cleaning Of Ducts Connecting Aph Outlet To Esp’S Inlet And Esp Outlet To Id Fan Inlet Gate. 126 Cleaning Of Rh / Sh Station, Aph Soot Blowing Staion & Scaph Station At Various Elevation. 127 Cleaning Of Boiler Soot Blower Station, Cbd Staion, & All Ventstation At Various Elevation. 128 Cleaning Of One No. Boiler During Night ( 06 Pm To 06 Am ) Of 2X500 M.W. 129 Removal Of Ash From Guide Bearing Area Ofa.P.H. 130 Cleaning Of Boiler Inside Sheeting, Window Glasses, Drain Pot & Drain Pipe And Observation Doors. 131 Collection Of Garbage Of Boiler Area And Disposal Of Same At Least 1-2 Kmaway From Chimney Or Area Specified By Engineer- In- Charge
