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| 1 | Routine maintenance, hammering and choking removal of ESP, APH, FG duct, chimney bottom ash evacuation system of unit No. 4 & 5 of 2x500 M.W. BTPS, Anpara. |
| 2 | Complete evacuation of fully / partially filled APH/FG Duct/Chimney/ESP hoppers of Unit No. 4 & 5 during startup of unit / due to break down of rotary feeders / due to break down of Auto/manual rapping system (EERM/ CERM) of ESP. |
| 3 | General upkeep of the DFA extraction plant (located within plant premises) of Unit No. 4 & 5 of 2X500 M.W., ‘B’ TPS, Anpara. |
| 4 | Complete cleaning of outer surface of hoppers, walls, equipment’s of ESP & DFA system and pipelines in ESP of 2X500 M.W. ‘B\" TPS, Anpara & General upkeep of the silo area of DFA Extraction Plant (located outside of plant premises). |
| 5 | Replacement /revisioning of bearing/rotor/DE & NDE bush / DE shaft/end cover of rotary air lock valve. |
| 6 | Replacement of damaged blade of rotor of rotary air lock valve. |
| 7 | Repairing of damaged/squeezed blades of rotor of rotary air lock valve by gas heating & pressing to bring them back in their original shape/angle. |
| 8 | Replacement of rotary air lock valve by new / repaired one. |
| 9 | Repairing of rotary vane shaft by welding with SS electrode (SS-304) and matching. |
| 10 | Repairing of end cover of rotary air lock valve by filling of material with cast iron electrode in the eroded portion and machining of end cover. |
| 11 | Repairing of cracked cast iron body/flange of rotary air lock valve by welding with CI electrode and machining /grinding of the same. |
| 12 | Servicing of Gear Box of rotary air lock valve including replacement of damaged part if any. |
| 13 | Replacement of Gear Box of rotary air lock valve by new/serviced/repaired gear box. |
| 14 | Attending leakage from ash pan by providing patch and welding with MS electrode. |
| 15 | Minor repairing of large/medium/small flushing apparatus of ESP/APH/FG duct/chimney hoppers. |
| 16 | Replacement / servicing of nozzle tips of flushing pan. |
| 17 | Repairing of deflected / damaged grating of sluiceways / drains of ESP area by cutting and welding / heating with gas and hammering. Big size: 1300 mm X 1000 mm. |
| 18 | Repairing of deflected / damaged grating of sluiceways / drains of ESP area by cutting and welding / heating with gas and hammering. Small size: 1000 mm X 1000 mm. |
| 19 | Cleaning of ash trenches of ESP area along with tightening of nut & bolts of liners of sluiceways. |
| 20 | Repairing / attending leakages of miscellaneous pipes /discharge pipes, equipment by patch welding with MS electrode. |
| 21 | Repairing of nozzle pipe / nozzle holder assembly of flushing pan. |
| 22 | Repairing of Expansion bellows by hammering, grinding and welding. |
| 23 | Cleaning of trenches of economizer/ APH / FG duct hoppers. |
| 24 | Cleaning of chimney duct hopper trenches and its surrounding area. |
| 25 | Cleaning of main sluiceways of ESP area located at south of ESP. |
| 26 | Replacement / repairing of following wear plates of large/ medium / small size flushing pans: Base wear plate. |
| 27 | Replacement / repairing of following wear plates of large/ medium / small size flushing pans: Side wear plate. |
| 28 | Replacement / repairing of following wear plates of large/ medium / small size flushing pans: vertical wear plate. |
| 29 | Replacement of gasket / jointing sheet of plate valve installed in transition pipe of large/ medium/ small size flushing pan. |
| 30 | Replacement of flange gaskets of LP water line / header in ESP area. |
| 31 | Checking & inspection thoroughly inside and outside, cleaning of large size flushing pan after dismantling and refitting of the same. |
| 32 | Checking & inspection thoroughly inside and outside, cleaning of medium and small size flushing pan after dismantling and refitting of the same. |
| 33 | Servicing / replacement of butterfly valves of following sizes: 50 mm NB |
| 34 | Servicing / replacement of butterfly valves of following sizes: 65 / 80 mm NB |
| 35 | Servicing / replacement of butterfly valves of following sizes: 150 mm NB |
| 36 | Servicing / replacement of gate valves installed in service water line. Size: 25 mm NB. |
| 37 | Servicing / replacement of gate valves installed in service water line. Sze:50 mm NB. |
| 38 | Servicing / replacement of gate valves installed in service water line. Size: 80 mm NB. |
| 39 | Servicing/Replacement of plate valve. size: 300 mm NB. |
| 40 | Servicing/Replacement of plate valve. Size: 200 mm NB. |
| 41 | Recouping of flanges / bends /T-bends/ reducers of different size from old / damaged pipe, flushing pans etc. by cutting & smoothening of their rough surface. |
| 42 | Fabrication of M.S. flanges of different sizes from M.S. plate by gas cutting, chipping, grinding & drilling etc. |
| 43 | Fabrication and erection / repairing of steel structure of different steel sections. |
| 44 | Providing tapping of different size M.S. /C.S. water pipe. |
| 45 | Replacement of worn out/damaged MS pipes. Size: 12 mm to 125 mm NB. |
| 46 | Replacement of worn out/damaged MS pipe. Size: 150 mm to 450 mm NB. |
| 47 | De-silting/cleaning of various water pipe. Size: 20/25 mm NB. |
| 48 | De-silting/cleaning of various water pipe. Size: 40/50 mm NB. |
| 49 | De-silting/cleaning of various water pipe. Size: 65 mm NB. |
| 50 | De-silting/cleaning of various water pipe.Size:80 mm NB to 150 mm NB. |
| 51 | Dismantling of pipe/valves, supports etc of various sizes by gas cutting and transportation from site-to-site store/scrap yard. |
| 52 | Providing of valve / flanges /bends /reducers /\"T\"-bends in existing / replaced pipeline as per scope of work. |
| 53 | Replacement of damaged gaskets of different sizes of flanges of bottom ash evacuation system of ESP, APH, FG duct & chimney as well as of HP/LP water line. |
| 54 | Replacement of filter cloth and cleaning of fluidizing pads of ESP hoppers |
| 55 | Fabrication & installation of pipe support / clamp of pipeline |
| 56 | Fabrication & replacement of 300 mm NB transition pipes of hoppers of 1st to 3rd row of ESP. |
| 57 | Fabrication & replacement of 200 mm NB transition pipes of hoppers of 4th to 7th row of ESP and FG duct /APH /chimney. |
| 58 | Fabrication & replacement of 200 mm NB transition pipes of hoppers of FG duct /APH /chimney. |
| 59 | Painting with one coat of red oxide primer & two coats of reputed make synthetic enamel paint of approved colour on pipe and steel structure. |
| 60 | Fabrication of bellow type expansion joints for 1st to 3rd row of ESP hoppers of Unit No. 4&5. |
| 61 | Fabrication of bellow type expansion joints for 4th to 7th row of ESP hoppers and for APH/FG duct hoppers of Unit No. 4&5. |
| 62 | Erection of bellow type expansion joints for 1st to 3rd row of ESP hoppers of Unit No. 4&5. |
| 63 | Erection of bellow type expansion joints for 4th to 7th row of ESP hoppers and for APH/FG duct hoppers of Unit No. 4&5. |
| 64 | Fabrication of M.S. pipe bends, reducers & \"T\"-bends of different sizes. |
| 65 | Fabrication of Large Size Flushing Apparatus including its 250 mm NB discharge bends for 1st to 3rd Row of ESP hoppers of unit # 4 & 5. |
| 66 | Fabrication of small/ medium size Flushing Apparatus of APH/FG duct hoppers including its 150 mm NB discharge bends of unit No. 4 &5. |
| 67 | Major repairing of large size flushing apparatus of ESP hoppers. |
| 68 | Major repairing of medium size flushing apparatus of ESP hoppers |
| 69 | Major repairing of small size flushing apparatus of APH/FG duct/Chimney hoppers |
| 70 | Erection of Large Size fabricated/major repaired Flushing Apparatus for 1st to 3rd Row of ESP hoppers of unit # 4 & 5. |
| 71 | Erection of small/medium size Flushing Apparatus of APH / FG duct/ESP hoppers of unit No. 4 & 5. |
| 72 | Painting of large size flushing apparatus. |
| 73 | Painting of Small/ Medium size flushing apparatus. |
| 74 | Complete overhauling of rotary air lock valve, chain, sprocket drive etc. by checking, replacement & cleaning of all parts from NDE side to DE side |
| 75 | Replacement / refitting of sluice ways liners of 12\" size |
| 76 | Overhauling of medium/small size flushing pans by repairing / replacement of liners and nozzles/nozzle pipe/base plate, manhole cover to discharge end pipe by cutting and welding. |
| 77 | Overhauling of large size flushing pans by repairing / replacement of liners and nozzles/nozzle pipe/base plate, manhole cover to discharge end pipe by cutting and welding |
| 78 | Complete overhauling of fluidizing valve of ESP hopper by dismantling the pipe, servicing of airline valves, repairing/replacement of worn-out parts. |
| 79 | Servicing of fluidizing pads installed inside the ESP hoppers by dismantling, cleaning of membrane/ strainer etc and refitting. |
| 80 | Dismantling of transition pipe of size 200 mm NB of medium/small size flushing pans for washing of electrodes of ESP during overhauling/long shut down of unit & refitting |
| 81 | Removal of choking of chimney hoppers by inserting pressurising water jet through the bypass opening, poking and evacuation of ash heap including of cleaning of sprinkled ash / slurry in the ground floor of chimney hopper area |
| 82 | Round the clock PLC based operation of Ash Water Recirculation System at AWRS Pump house, Anpara |
| 83 | Routine & preventive maintenance of 9 Nos. (VT Multistage) Ash water recirculation Pumps, 3 Nos Submersible pumps etc. and associated equipment’s |
| 84 | Daily checking & maintenance of ABB make 0.4 kv modules of switch gear rooms of AWRS System |
| 85 | To carry out internal and external cleaning of AWRS Electrical panels MCCs, JB\"s etc |
| 86 | Maintenance of control & instrumentation field equipment’s of ash water recirculation system of \"A\" & \"B\"TPS, Anpara. |
| 87 | Cleaning & Removal of Dust, Cobweb& Grease/Oil etc. From ash water recirculation pumps And Other Connected Equipment’s, Pipes and Valves Inside the Pump House and Valves System. |
| 88 | General Upkeep of Floor, Walls and Roof of Ash Water Recirculation Pump House, Control Room, Switch Gear Room, External Cleaning of Electrical Panels etc. |
| 89 | Removal Choking of Septic Tank / Sewage Line Up to Septic Tank for Proper Flushing of Sewage from Toilets Located in Ash Water Recirculation Pump House. |
| 90 | Complete servicing/ overhauling including replacement of worn-out parts of AWRS pump. |
| 91 | Checking and servicing / replacement of ball/Thrust roller bearings of AWRS pumps. |
| 92 | Complete Servicing / overhauling including replacement of worn-out parts of Sump pumps of AWRS. |
| 93 | Complete overhauling of SS Gates of channel of AWRS. |
| 94 | Complete overhauling of overhead cranes of AWRS pump house. |
| 95 | Dewatering and cleaning and AWRS Sump pits including digging of wet sludge and disposal of the same. |
| 96 | Servicing of gate valve of 250/ 350 mm NB. |
| 97 | Overhauling of air release vents of 800 mm Dia AWRS pipes. |
| 98 | Servicing of non-return valve of 150 mm NB. |
| 99 | Servicing of non-return valve of 350 mm NB. |
| 100 | Servicing of butterfly valves of AWRS Pipelines of 800 mm NB. |
| 101 | Maintenance of motors of up to 275 Kw of AWRS system. Complete overhauling of LT Motor |
| 102 | Rewinding of 0.4 KV motor above 5 KW up to 275 KW (rate is to be quoted in Rs. /KW). |
| 103 | Tightening of connection plates of 0.4 kv motors (one job means tightening of connection plates of one motor) |
| 104 | Revisioning of cooling /fans tightening. |
| 105 | Cable box / terminal box repair, change of insulation / leads etc. |
| 106 | Rewinding of motor/ replacement of bearing of ceiling fans. |
| 107 | Rewinding of motors above 1 KW up to 5 KW. |
| 108 | Break down maintenance due to flashover on any portion of the bus bar including re-commissioning in LT Switchgear. |
| 109 | Overhauling/break down maintenance of breakers including replacement of defective parts in LT Switchgear. |
| 110 | Replacement of HT/LT, Neutral bushing/ Gasket of transformer . |
| 111 | Arresting oil leakage from radiators and associated pipelines and valves etc. |
| 112 | Centrifuging of transformer oil of transformer/ storage tank. |
| 113 | Overhauling of L.T. Transformer. |
| 114 | Dismantling and reassembling of breaker (0.4 KV). |
| 115 | Cleaning of transformer yard area and its surroundings. |
| 116 | Testing/replacement of 11/33 KV CT/PT & its connected circuit. |
| 117 | Daily routine/Preventive maintenance works, up keeping, attending faults of minor nature of submerged scrapper conveyor, clinker grinder, furnace bottom ash hopper gates, their hydraulic drive/actuator system and their associated equipment’s round the clock. One job includes the above work in three shifts (one shift is of duration 8.00 hrs.) in a day for one unit of 2X500 MW. |
| 118 | Disposal of ash/clinker debris from the oversize bund of furnace bottom ash disposal system by tractor, trolly, truck at a distance of 2.5 KM to 3.0 KM radius within the premises of powerhouse. (The above work also includes the removal of ash/clinker, debris and cleaning of floor nearby the SSC and equipments e.g. power pack, ash gates, supporting structures of ash hooper & SSC etc. with water/clothe in case of breakdown of SSC/clinker grinder & ash hopper gates etc.) |
| 119 | Reclamation/ Repairing of old & used worn out flight bar of Submerged Scraper Conveyor of Furnace Bottom Ash Disposal System in unit no. 4 & 5, 2x500 MW, BTPS, Anpara. |
| 120 | Complete servicing of Ash Gate hydraulic cylinder with connected oil actuator and oil supply lines. |
| 121 | Cutting of elongated chain link, refitting of chain links and successful trial Run of SSC. |
| 122 | Dismantling and replacement /reversing and refitting of flight bar with new / workable/repaired flight bar & successful trial run of SSC. |
| 123 | Straightening of bent &distorted flight bars with the help of heating torch and hydraulic jack. |
| 124 | Remounting of SSC chain in case of dislocation of chain from sprocket Head end snub shaft /bottom/top trough /tail end rollers and its successful trial run. |
| 125 | Repairing & re-strengthening by welding on different sizes of pipes, ash Hopper casing, SSC body etc. double coat (run) with suitable welding. |
| 126 | Replacement/servicing of bearing of clinker grinder after removing Bearing housing &cleaning of grease &re-grease. |
| 127 | Replacement/servicing of bearing of Head end shaft assembly and alignment if required & successful trial run. |
| 128 | Replacement/servicing of bearing of head end snub shaft/bottom trough shaft/tail end shaft, alignment of rollers and successful trial run. |
| 129 | Complete servicing of hydraulic chain tensioning unit including cleaning oil replacement of reservoir, seals replacement on hydraulic rams of Chain tensioner, servicing of pressure relieves valves etc. and its successful trial run. |
| 130 | Replacement of Hydraulic cylinder of chain tensioning unit. |
| 131 | Repairing/replacement of damaged oil pipelines of hydraulic chain tensioning unit/ ash gate actuator by cutting it with grinder preparation of \"V\" for welding & welding with suitable electrode. |
| 132 | Replacement of defective oil hose pipe of hydraulic chain tensioning unit/ ash gate actuator, clinker grinder/SSC hydraulic motor etc. |
| 133 | Overhauling of Head shaft assembly /replacement of defective parts with new /old healthy parts. |
| 134 | Complete servicing /replacement of damaged parts of top trough stub shaft assy. Including cover plate. |
| 135 | Alignment of old chain/replacement of chain of SSC with new one. |
| 136 | Servicing/Replacement of hydraulic pump of clinker grinder and its successful. trial run. |
| 137 | Fabrication/Repairing of thrust washer of stub shaft roller assembly |
| 138 | Servicing/Repairing/Replacement of spidex insert / coupling of SSC, Clinker Grinder/Ash Gate. |
| 139 | Servicing/Replacement of oil pump of hopper ash gate & its successful trial run. |
| 140 | Servicing/Replacement of oil pump of SSC & its successful trial run. |
| 141 | Cleaning of seal trough of boiler. |
| 142 | Evacuation of SSC body in case of breakdown by taking out all the ash/ clinker manually. |
| 143 | Cleaning of inner & outer filters power pack system. |
| 144 | Servicing of hydraulic motor of clinker grinder & its successful trial run. |
| 145 | Replacement of oil seals of hydraulic motor of SSC & its successful trial run. |
| 146 | Repairing of rollers of top trough shaft, tail end shaft, idler shaft assy. |
| 147 | Repairing /servicing /replacement of quenching nozzle body. |
| 148 | Closing & opening of ash discharge gate of furnace bottom ash hopper manually. |
| 149 | Repairing /servicing of sight peep holes. |
| 150 | Cleaning/ Flushing of bottom ash hopper spray drain collecting pipe. |
| 151 | Servicing of valves of water line of FBAD system. |
| 152 | Repair. of top trough shaft by welding and machining to finished surface. |
| 153 | Replacement of hydraulic motor of SSC. |
| 154 | Removal of chocking of furnace bottom ash hopper. |
| 155 | Repairing/servicing/ replacement of rollers of snub/idler shaft of bottom trough & tail end shaft. It includes -(a) Removal of shaft from the SSC.(b) Removal of rollers from the shaft(c) Build-up of worn-out portion with the help of welding with suitable electrode.(d) Grinding/machining of the rollers to achieve smooth surface.(e) Refitting of the rollers on the shaft.(f) Refitting of the shaft on the SSC body. |
| 156 | Repairing /fabrication &erection of grating at the discharge of ash/clinker from the SSC to the clinker grinder. |
| 157 | Flushing of cooling pipeline for oil cooler and bush bearing of stub Shaft assly. |
| 158 | Repairing/fabrication &erection of liner plate near head end shaft /return idler shaft. |
| 159 | Patch work on worn out portion of furnace bottom ash hopper, discharge chute of SSC body over the clinker grinder and clinker grinder chute. |
| 160 | Fixing of new tiles/Ms plate in place of worn-out tiles over the mother plate of SSC. It includes(a) Provide scaffolding where ever required for removal of worn tiles.(b) Removal of tiles & its fixing material from the mother plate.© Grinding of mother plate for smooth surface.(d) Cutting of the tiles in the required shape with the help of diamondcutting machine.(e) Fixing of new tiles and leveling them after applying fixing material over the mother plate & successful trial run of SSC. |
| 161 | Repairing /servicing/replacement of bearing housing & its assembly of top trough stub shaft assy. It includes (a) Removal of bearing housing assy. And its dismantling. (b) Build-up of worn out portion with the help of suitable electrode.© Grinding/machining of the bearing housing assembly to achieve smooth surface and profile.(d) Refitting of bearing housing assy. with stub shaft and it successful trial run. |
| 162 | Repairing of drain collecting pipe assy. of furnace bottom ash hopper. |
| 163 | Servicing/Replacement of Hydraulic Motor (Model: CA 50) of Clinker grinder. |
| 164 | Replacement of old, used and worn-out snub/tail end/idler shaft of SSC. |
| 165 | Replacement of old and clogged seeping water line to various aux. of FBAD system. |
| 166 | Cleaning of pipeline. |
| 167 | Fabrication of the flange with the help of MS plate.40 mm NB. |
| 168 | Welding works of joining pipe to pipe for lying of pipeline per joint. Size: 50mm NB. |
| 169 | Welding works of joining pipe to pipe for lying of pipeline per joint. Size: 40 mm NB. |
| 170 | Welding works of joining pipe to pipe for lying of pipeline per joint. Size: 25 mm NB. |
| 171 | Welding works of joining pipe to pipe for lying of pipeline per joint. Size: 15 mm NB. |
| 172 | Fabrication of bends with the help of cutting of pipe into desired section & its welding. Size: 50 mm NB. |
| 173 | Fabrication of bends with the help of cutting of pipe into desired section & its welding. Size: 40 mm NB |
| 174 | Erection of valves in the pipeline after revisioning of the valve. Size:40 mm NB. |
| 175 | Erection of valves in the pipeline after revisioning of the valve. Size: 25 mm NB. |
| 176 | Fabrication of pipe support by welding the angle / channel and other Steel sections and its grouting as & when required. |
| 177 | Laying alignment of pipeline of size 150/100mm for different location. |
| 178 | Painting of outer surface of pipeline with coat of primer and two coat of paint with approved color and quality of synthetic enamel. Paint after surface preparation. |
| 179 | Replacement /Repairing of Chain protection angle at bottom of both side wall of Top trough. |
| 180 | Replacement of the valves of water lines of FBAD system. |
| 181 | Replacement of water let nozzle of chain cleaning line. |
| 182 | Repairing/Fabrication &erection of eroded flap at the discharge of ash/clinker from the SSC to the clinker grinder. |
| 183 | Repairing of guide wheel protection box. |
| 184 | Servicing of furnace bottom ash hopper gate with roller assembly. |
| 185 | Servicing of spur gear of clinker grinder & its successful trial run. |
| 186 | Complete overhauling of clinker grinder. |
| 187 | Provide scaffolding inside the complete bottom ash hopper for different works in FBAD system. |
| 188 | Removal of clinker grinder with complete hydraulic motor assly. from its position for maintenance works and replacing the same on its position after completion of work. |
| 189 | Removal of SSC complete assy. from its position for maintenance. Works & replacing the same on its original position there after servicing of travelling wheels of the SSC body. |
| 190 | Fabrication and erection of steel structures to facilitate the various maintenance works of furnace bottom ash disposal system. |
| 191 | Fabrication and erection of chute and body of clinker grinder of FBAD System. |
| 192 | Fabrication and erection of furnace bottom ash hopper (inner & outer) Chute and refitting in same position. |
| 193 | Repairing of Drive and Driven shaft of clinker grinder. |
| 194 | Replacement of new/repaired furnace bottom ash hopper gate of FBAD System. |
| 195 | Repairing of old & used worn-out teeth and collar of clinker grinder teeth segment of clinker grinder of 2X500MW, BTPS, Anpara. |
| 196 | Dismantling, Servicing, Fabrication/Repairing of damaged parts, assembling of Hydraulically operated Bottom Ash Hopper Discharge gate of 2x500MW, BTPS, Anpara. |
| 197 | Reclamation/Repairing of various critical old and used, worn out head end shafts of Submerged Scrapper Conveyor of Furnace Bottom Ash Disposal System of 2x500MW, BTPS. |
| 198 | Reclamation/Repairing of various critical old and used, worn out tail end shafts of Submerged Scrapper Conveyor of Furnace Bottom Ash Disposal System of 2x500MW, BTPS. |
| 199 | Reclamation/Repairing of various critical old and used, worn out Snub / Idler Shaft of Submerged Scrapper Conveyor of Furnace Bottom Ash Disposal System of 2x500MW, BTPS. |
| 200 | Reclamation/Repairing of old, used and worn-out chain drive sprockets of Submerged Scrapper Conveyor of Furnace Bottom Ash Disposal System of 2x500MW, BTPS, Anpara. |
| 201 | Dismantling, servicing, fabrication of damaged parts, Assembling of Hydraulic pump of SSC of furnace Bottom Disposal system. |
| 202 | Dismantling, Servicing, Fabrication of damaged parts, Assembling of hydraulic pump of Clinker Grinder of furnace bottom ash disposal system. |
| 203 | Dismantling, servicing, fabrication of damaged parts & assembling of hydraulic motor of Clinker Grinder (CA-50) for furnace bottom ash disposal system. |
