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| 1 | Round the clock daily preventive maintenance work of Main Boiler, APH, Scanner fans, Damper Sealing Blowers of PA, SA and Flue gas, /Oil/Coal Burner , Igniter guide pipes ,CCP etc., valves and other associated equipment’s ,keeping watch on abnormal sound from first pass ,second pass of pressure parts of the Boiler unit no. 6 & 7 of 2X500 MW,DTPS, Anpara. |
| 2 | Daily routine maintenance works of ESP of Both Units of Anpara D Thermal Power Station during day in General Shift. |
| 3 | System line up for filling of Feed water through Boiler Feed Pump/Boiler fill pump for Hydraulic Test of Boiler, normalization of the same after Hydraulic Test and making the System ready for Boiler Light up. |
| 4 | De-scaling of Pressure Parts & removal of soot from heating surface of Boiler by steam blowing through Wall Blowers/ Long Retractable Soot Blowers (LRSB) from local/UCB Panel on daily basis as per cycle provided. |
| 5 | Complete servicing/revisioning of Jam Wall Blowers for their smooth operation |
| 6 | Complete servicing/revisioning of Jam Long Retractable Soot Blowers (LRSB) for their smooth operation. |
| 7 | Replacement of Flange Gasket of head valve Assembly of Wall Blowers/LRSB & orifices of Soot Blowing System. |
| 8 | Complete servicing/revisioning of head valve assembly of Wall Blowers/LRSB. |
| 9 | Servicing of Gear Boxes of Rotary/Traverse motion of Wall Blowers |
| 10 | Servicing of Gear Boxes of Rotary/Traverse motion of LRSB. |
| 11 | Repairing/replacement of damaged Trip rod cover plate/Trip rod by proper grinding & welding with suitable welding electrode |
| 12 | Servicing/Replacement of Chain of LRSB by providing chain lock or adding cutting the chain to a suitable length for smooth traveling of the equipment. |
| 13 | Fabrication of metallic washer from 2-3 mm M.S. Plate for carriage housing |
| 14 | Replacement of Gland packing to arrest steam leakage from LRSB Lance Tube/ Wall Blower Swivel Tube Assembly. |
| 15 | Servicing of carriage housing of LRSB |
| 16 | Replacement of damaged Lance Tube of LRSB/ Swivel Tube of Wall Blowers |
| 17 | Straightening of bend Lance Tube of LRSB/ Swivel Tube of Wall Blowers |
| 18 | Repair/rectification of water wall tubes in boiler furnace from boiler bottom header to 74-meter elevation, excluding burner zone. When the work involves 1 to 10 joints. |
| 19 | Repair/rectification of water wall tubes in boiler furnace from boiler bottom header to 74-meter elevation, excluding burner zone. When the work involves the number of joints above 10 joints. |
| 20 | Repair/rectification of water wall tubes in boiler furnace in burner zone between 20 meter to 41 meter elevation When the work involves 1 to 10 joints. |
| 21 | Repair/rectification of water wall tubes in boiler furnace in burner zone between 20 meter to 41 meter elevation When the work involves the number of joints above10 joints. |
| 22 | Repair/rectification of pressure parts tubes in rear water wall screen tubes, back pass super heater screen tubes, extended bottom & rear arch tubes and penthouse area When the work involves 1 to 10 joints. |
| 23 | Repair/rectification of pressure parts tubes in rear water wall screen tubes, back pass super heater screen tubes, extended bottom & rear arch tubes and penthouse area When the work involves the number of joints above 10 joints. |
| 24 | Repair/rectification of the pressure parts tubes in Ceiling S/H (Roof Wall), Divisional S/H & Platen S/H When the work involves 1 to 10 joints for SA213 TP347H & SA213T22 material |
| 25 | Repair/rectification of the pressure parts tubes in Ceiling S/H (Roof Wall), Divisional S/H & Platen S/H When the work involves the number of joints above 10 joints for SA213 TP347H & SA213T22 material |
| 26 | Repair/rectification of the pressure parts tubes in Ceiling S/H (Roof Wall), Divisional S/H & Platen S/H When the work involves 1 to 5 joints SA213T 91 materials (Preheating, post heating & SR in contractors’ scope) |
| 27 | Repair/rectification of the pressure parts tubes in Ceiling S/H (Roof Wall), Divisional S/H & Platen S/H When the work involves above 5 joints SA213T 91 material (Preheating, post heating & SR in contractors scope) |
| 28 | Repair / rectification of pressure parts tubes in CRH, HRH, water Wall Hanger Tubes and ceiling super heater associated with these zones When the work involves 1 to 10 joints. |
| 29 | Repair / rectification of pressure parts tubes in CRH, HRH, water Wall Hanger Tubes and ceiling super heater associated with these zones When the work involves the number of joints above 10 joints |
| 30 | Repair/rectification of spacer tubes/ binder tubes, drain & vent tubes of superheater and Reheater When the work involves 1 to 10 joints. |
| 31 | Repair/rectification of spacer tubes/ binder tubes, drain & vent tubes of superheater and Reheater When the work involves the number of joints above 10 joints. |
| 32 | Repair/rectification due to crack/ pinhole, dents in water wall, steam cooled wall, super heater/reheater attachments, drain line, roof tube or any other pressure parts tubes of Boiler. |
| 33 | Repair/rectification of hand hole cap, Gama plug of headers by removing it by cutting the same if required & welding it with complete NDT as per IBR. |
| 34 | Fixing of sky climbers in boiler furnace after making proper platform on bottom ash hopper, its operation during execution of work & dismantling and removal along with bottom ash hopper platform after completion of pressure part works. |
| 35 | Shifting of sky climber in boiler furnace at different locations for attending and inspection of various pressure parts zones. |
| 36 | Rectification / replacement of damaged clamps, binders, scalloped bars of different zones of pressure parts of Boiler Scalloped bars |
| 37 | Rectification / replacement of damaged clamps, binders, scalloped bars of different zones of pressure parts of Boiler Binder, support, Lugs. |
| 38 | Rectification / replacement of damaged clamps, binders, scalloped bars of different zones of pressure parts of Boiler Flexible connector (male/Female/tangent/sliding/tie support) for SA213 TP 347 H & SA213 T22 |
| 39 | Rectification / replacement of damaged clamps, binders, scalloped bars of different zones of pressure parts of Boiler When the work involves 10 flexible connector (male/Female/tangent/sliding/tie support) For SA213 T91 (Preheating, post heating & SR in contractors scope) |
| 40 | Rectification/replacement of ash protectors /shielding found damaged /eroded /distorted or providing new protectors in the following pressure parts zone of boiler: Tubular (half round) protector of superheaters and their Spacer tube. Protectors / shielding shall be rectified / installed. |
| 41 | Rectification/replacement of ash protectors /shielding found damaged /eroded /distorted or providing new protectors in the following pressure parts zone of boiler: Tubular protectors / shielding of water wall hanger tubes, water wall, Reheater & superheater screen tube. (For installation of protectors necessary scaffolding has to be made by the agency.) |
| 42 | Stress relieving of tube/header joints of thickness 12 mm and above(or as per NDT manual) . |
| 43 | Fin welding of water wall tubes, steam cooled roof tube as per IBR. |
| 44 | Erection of scaffolding and making approaches for checking of pressure parts tubes and rectification of defects if any, in the following areas/zones and their dismantling after completion of works in Spacer tube of Divisional superheater coils. |
| 45 | Erection of scaffolding and making approaches for checking of pressure parts tubes and rectification of defects if any, in the following areas/zones and their dismantling after completion of works in Spacer tubes of Platen superheater coils. |
| 46 | Erection of scaffolding and making approaches for checking of pressure parts tubes and rectification of defects if any, in the following areas/zones and their dismantling after completion of works in Spacer tubes of CRH coils. |
| 47 | Erection of scaffolding and making approaches for checking of pressure parts tubes and rectification of defects if any, in the following areas/zones and their dismantling after completion of works in Spacer tubes of HRH coils. |
| 48 | Repair/rectification of Economizer Coil and its hanger (Upper/Middle/Lower) When the work involves 1 to 10 joints. |
| 49 | Repair/rectification of Economizer Coil and its hanger (Upper/Middle/Lower) When the work involves the number of joints above 10 joints. |
| 50 | Repair/rectification of Primary super heater coil (LTSH) and its hanger. (Upper/Lower) When the work involves 1 to 10 joints. |
| 51 | Repair/rectification of Primary super heater coil (LTSH) and its hanger. (Upper/Lower) When the work involves the number of joints above10 joints. |
| 52 | Lifting and taking out the complete coil in pair of primary super heater Horizontal coil / Economizer coil after cutting of clamps, supports clit, stoppers and releasing from subsequent headers, their restoration and positioning after repair/replacement of coil. |
| 53 | Repair/rectification of Back Pass Rear/Front/ Side wall Tube (steam cooled wall tube)/roof tubes of pressure parts tube for rectification of defects if any When the work involves 1 to 10 joints. |
| 54 | Repair/rectification of Back Pass Rear/Front/ Side wall Tube (steam cooled wall tube)/roof tubes of pressure parts tube for rectification of defects if any When the work involves the number of joints above 10 joints. |
| 55 | Repair / rectification of Header stubs of various headers of pressure parts When the work involves 1 to 10 joints. |
| 56 | Repair / rectification of Header stubs of various headers of pressure parts When the work involves the number of joints above 10 joints. |
| 57 | Rectification/replacement of ash protectors/shielding/cassette baffles found damaged/eroded/distorted or providing new protectors in the following pressure parts zone of the boiler Tubular protectors/shielding of primary super heater (LTSH), economizer coils. For installation of protectors necessary scaffolding has to be made by the agency. |
| 58 | Rectification/replacement of ash protectors/shielding/cassette baffles found damaged/eroded/distorted or providing new protectors in the following pressure parts zone of the boiler Box type protectors/shielding of primary super heater (LTSH), economizer coils. For installation of protectors necessary scaffolding has to be made by the agency. |
| 59 | Fin welding to back pass front, side and rear steam cooled wall tubes by high pressure welding. |
| 60 | Rectification/replacement of damaged hanger strip of economizer coils after cutting of damaged portion by cut rods, grinding of hanger support plate and welding of new/rectified hanger strip by suitable welding electrodes. |
| 61 | Erection of scaffolding and making approaches for checking of pressure parts tubes for rectification of defects if any, in the following areas/zones and dismantling after completion of work Super heater/ W.W Screen tube/Pri. Super heater verticals/Eco. Hanger tubes/Eco. Inlet Header at left / right side in single layer / elevation. |
| 62 | Erection of scaffolding and making approaches for checking of pressure parts tubes for rectification of defects if any, in the following areas/zones and dismantling after completion of work Super heater/ W.W Screen tube/Pri. Super heater vertical panels/Eco. Hanger tubes/Eco. Inlet Header from left to right side in single layer / elevation. |
| 63 | Erection of scaffolding and making approaches for checking of pressure parts tubes for rectification of defects if any, in the following areas/zones and dismantling after completion of work in Economizer hopper (above) |
| 64 | Repair/rectification of hand hole cap, Gama plug of headers by removing it by cutting the same if required & welding it with complete NDT as per IBR. |
| 65 | Repair/rectification due to crack/ pinhole,dents insteam cooled wall, super heater/economizer attachments, drain line , roof tube etc. |
| 66 | Cutting and removal of skin casing / crown plate by grinder and welding the same with-suitable electrode as per IBR, after completion of repair jobs of pressure parts if any Thickness - 8mm. |
| 67 | Cutting and removal of skin casing / crown plate by grinder and welding the same with-suitable electrode as per IBR, after completion of repair jobs of pressure parts if any Thickness - 16mm |
| 68 | Rectification / replacement of damaged clamps, binders, scalloped bars of different zones of pressure parts of Boiler Scalloped bars |
| 69 | Rectification / replacement of damaged clamps, binders, scalloped bars of different zones of pressure parts of Boiler Binder, support , Lugs. |
| 70 | Rectification / replacement of damaged clamps, binders, scalloped bars of different zones of pressure parts of Boiler U Clamp |
| 71 | Fabrication of bends as per site requirement by filling sand and uniform heating by heating torch of following steels Carbon steel. |
| 72 | Fabrication of bends as per site requirement by filling sand and uniform heating by heating torch of following steels Alloy steel. |
| 73 | Build-up of eroded portion of pressure parts tubecaused by Ash /Steam erosion using suitable electrodes matching with parent metal composition , by Arc/ Argon Welding of 250mm length, 35mm width. |
| 74 | Servicing / Revisioning of Boiler Circulation Pump Elbow down stop check valve, Nb – 350/300 mm, Design Pr. – 213.8 Kg/sq.cm |
| 75 | Servicing /Revisioning of manually operated Main steam stop Valve (MSV-1&2). Nb - 500 mm, Design Pr. - 191.5 Kg/ sq.cm. |
| 76 | Servicing/ Revisioning of Economizer Inlet Isolating gate Valve. Nb - 450 mm, Design Pr. - 320 Kg/ sq.cm. |
| 77 | Servicing/ Revisioning of Economizer non return flap Valve. Nb - 450 mm, Design Pr. - 320 Kg/ sq. cm. |
| 78 | Servicing/ Revisioning of SH Spray outlet Isolating valves. Nb -125 mm, Np - 356 Kg/ sq.cm. |
| 79 | Servicing/ Revisioning of pneumatically operatedblockValve & Control Valve of Super heater attemparation line. Nb – 125 to 200 mm, Design Pr. –356 Kg/ sq.cm. |
| 80 | Servicing/ Revisioning of pneumatically operatedblockValve & Control Valve ofReheater attemparation line.Nb – 65 to 100 mm, Design Pr. – 176 Kg/ sq.cm. |
| 81 | Servicing/ Revisioning of RH Spray outlet Isolating valves. Nb -65 mm, Np - 176 Kg/ sq.cm. |
| 82 | Servicing/ Revisioning of Soot blowing PRV and other similar valve . Nb 50 to 100 mm, Np – 198.9 Kg/ sq.cm |
| 83 | Servicing/ Revisioning of pneumatically operated Thermal drain valveand other similar valves. Nb – 25, Design Pr.- 40 Kg/cm2 |
| 84 | Servicing/ Revisioning of High Pressure Hand operated Valves and NRVs . Nb – 10 to 200 mm. |
| 85 | Servicing/ Revisioning of Motor operated High Pressure valves. Nb -20 to 200 mm. |
| 86 | Servicing/ Revisioning of blow down valve Motor operated Valves .Nb – 40 mm , Design Pr.-210.8 kg/cm2. |
| 87 | Servicing/ Revisioning of Diaphram Actuated Head valveDAHV( pneumatic) .Nb – 50 mm , Design Pr.-40 kg/cm2. |
| 88 | Blanking of Hot reheat and cold reheat isolating device( Dia. 660 mm) by blanking device and normalising the same. |
| 89 | Servicing/ Revisioning of Boiler Drum Safety valves. Nb – 3”/6”, Design Pr.- 209 to 216 Kg/ sq. cm. |
| 90 | Servicing/ Revisioning of MS line Safety valves. Nb – 3”/6”, Np - 185.5 Kg/ sq. cm. |
| 91 | Servicing/ Revisioning of MS line Electromagnetic relief valves. Nb – 2.5”/4”, Np – 185 to 187 Kg/ sq. cm. Temp. - 540 deg. C |
| 92 | Servicing/ Revisioning of Hot Re-heat & Cold Re-heat Safetyvalves. (a) CRH - Nb -6”/10”, Design Pr – 52.4 to 54 Kg/ sq. cm. (b) HRH – Nb -6”/8”, Design Pr – 49 to 50.5 Kg/ sq. cm. |
| 93 | Servicing/ Revisioning of Hot Re-heat Electromagnetic relief valves. Nb – 6”/8”, Np – 48 to 48.5 Kg/ sq. cm. Temp. - 540 deg. C |
| 94 | Servicing/ Revisioning of Soot blower PRV outlet Safety valves. Nb – 2.5”/4”, Np - 40 Kg/sq. cm. |
| 95 | Servicing/ Revisioning of Heavy & LightOil valves (pneumatic operated ) as HOTV, LOTV,HOCV,LOCV,HORTV,LORTV Nb –40-100 mm, Working Pr. -15/ 22 Kg/sq. cm. |
| 96 | Servicing/replacement of Air/HFO/LFO/Steam pneumatically operated Trip valves at all elevations |
| 97 | Servicing/replacement of Air/HFO/LFO/Steam lines valves and NRVsat all elevations |
| 98 | Replacement of gaskets of flanges and bonnets of valves. |
| 99 | Replacement of gland packing of High pressure valves. |
| 100 | Attending leakage of pipelines and headers etc. of Main Boiler |
| 101 | Cleaning of Oil Strainer of Fuel Oil Station on firing floor. |
| 102 | Servicing of Gear Box of Hand operated Air motor driven valves of Main Steam line, BCP, ERV etc. |
| 103 | Replacement of Safety Valve seat of critical piping such As Boiler Drum, Main Steam line, Reheater line etc. |
| 104 | Replacement of High pressure valve (motor operated/Hand operated) of critical piping of Boiler of size 15 - 25 mm. |
| 105 | Replacement of High pressure valve (motor operated/Hand operated) of critical piping of Boiler of size 40 - 50 mm. |
| 106 | Replacement of High pressure valve (motor operated) hand operated) of critical piping such as Main Steam, Final Super Heater, Primary Super Heater, CBD etc. of size 65 - 150 |
| 107 | Replacement of Coal Nozzle Assy. Complete of consisting of coal nozzle casting, Adjustable coal nozzle tip, seal plate, Ribbons by repaired/ new one. |
| 108 | Repairing/ servicing of burner tilting lever. |
| 109 | Replacement of fuel Inlet elbow (short). |
| 110 | Replacement of fuel Inlet elbow (long). |
| 111 | Servicing/ revisioning of Gun Guide Assy. of AB, CD, EF & GH , JK Elevations. |
| 112 | Servicing/ revisioning of Oil Burners of AB, CD, EF,GH & JK Elevations. |
| 113 | Servicing/ revisioning of Igniter Guide pipe Assy. |
| 114 | Servicing/ revisioning of Scanner Guide pipe Assy. |
| 115 | Repairing/ revisioning of Air compartments |
| 116 | Arresting of coal leakage from flange of coal burner at an elevation of corners. Patch size 400 mm x 300 mm |
| 117 | Replacement of damaged bolts of burner compartments by cutting the stuffing box and well and welding bolt head of required size. Restoration of stuffing box by welding. |
| 118 | Replacement of seal tube of oil burner/Igniter/flame/scanner hoses. |
| 119 | Repairing / reclamation of old & used and worn out SS coal nozzle tips. |
| 120 | Repairing/Reclamation of old& used worn out repairableCS coal nozzle Castings . |
| 121 | Replacement / Servicing ofcoal elbow gate |
| 122 | Fabrication & erection/ Modification of plate forms / structures for facilitating the various breakdown maintenance works of coal/air/oil compartment assembly. |
