Tamil Nadu Generation And Distribution Corporation Limited Tender

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Tamil Nadu Generation And Distribution Corporation Limited - TANGEDCO Tender

Civil And Construction
Civil Works Others
Eprocure
Opening Date7 May 2022
Closing Date23 May 2022
Tender AmountRefer Documents 
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BOQ Items

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Gas Turbine Accessories like Lube Oil Skid Gas Module, Inlet Air Filter System and Exhaust system and Waterwashing of Gas Turbine.General Monitoring, Routine check-up, General cleaning for up-keeping the equipments, corrective actions as per the direction of Engineer-in-charge, checking the lube oil tank level and topping up the lube oil using centrifuge, replacing the lube oil & hydraulic oil filter elements, draining the moisture collected from air processing unit, replacing the filter cartridge of mist eliminator as required, assisting during Online water washing of GT and any other minor works related to the Mechanical Maintenance of the system.

104

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GT Vent Fans, Blowers, Cooling Fans and Mist Eliminator Fans.General Monitoring, Routine check-up, General cleaning for up-keeping the equipments, corrective actions as per the direction of Engineer-in-charge, greasing the Damper actuators, check for free operation of Dampers and any other minor works related to the Mechanical Maintenance of Fans & Dampers.

24

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IA/PA Compressors & Nitrogen System. General Monitoring, Routine check-up, General cleaning for up-keeping the equipments, corrective actions as per the direction of Engineer-in-charge, cleaning of suction & discharge valves, changing of oil & air filters, greasing of valves and any other minor works related to the Mechanical Maintenance of the system.

52

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IA/PA Compressor Coolers and Cooling Towers. General Monitoring, Routine check-up, General cleaning for up-keeping the equipments, corrective actions as per the direction of Engineer-in-charge, cleaning of compressor coolers by back wash if required, changing the failed cooler gaskets, greasing of valves, cleaning the fan blades, adjusting the fan belt tension, changing the belt, alignment correction, if required, topping up of lub oil for bearing and any other minor works related to the Mechanical Maintenance of the system.

12

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IA/PA Cooling Towers Fins cleaning. Complete dismantling, cleaning & assembling of corrugated cooling sheets of IA/PA Cooling Towers.

4

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ACW & ACHE system including Fans.General Monitoring, Routine check-up, General cleaning for up-keeping the equipments, corrective actions as per the direction of Engineer-in-charge, attending any minor leak in the system, gland leak in the pumps, greasing of valves, alignment checking, renewal of grease in the bearings, checking the tightness of the bolt & nuts in ACHE system, checking the belt tension, if necessary replacement of belt and any other minor works related to Mechanical Maintenance of the system.

104

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IA/PA Cooling Water Pumps and GT Evaporative Cooler Pumps.General Monitoring, Routine check-up, General cleaning for up-keeping the equipments, corrective actions as per the direction of Engineer-in-charge, attending any minor leak in the pump & flanges, arresting the gland leak, alignment checking, renewal of grease or oil in the bearings, renewal of bearings, oil seals & couplings if necessary and any other minor works related to the Mechanical Maintenance of the system.

12

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Gas Turbine Centrifuge and Filteration unit system. Routine check of the Centrifuge & Filtration Unit for any abnormal sound, vibration & temperature, Oil leakages and attending the corrective action as per the direction of Engineer - in - Charge.Up-keeping of the above equipments by thorough external cleaning and removing of dust and dirty oil, etc., centrifuge pump internal plates cleaning with diesel in three months once. Attending any minor leak in the pump & flanges, renewal of Filtration unit filters, renewal of Mechanical Seal and any other minor unforeseen works related to the Mechanical Maintenance of the system.

150

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GT - Diverter Damper / Guillotine Damper Seal air fan blowers and 88TK fans. Overhauling of Seal air fans and manual operation of Diverter Damper / Guillotene Damper such as dismantling the outer cover and gasket. Disconnecting the fan from motor shaft and cleaning of fan housing. Dismantling the NRV, inspecting for any damage Reassembling the fan on motor shaft and closing the cover with new gasket in place. Removal of bearings of NRV flap, inspecting them for healthiness and replacing if necessary. (Bearings will be supplied by the TANGEDCO.) Packing grease and reassembling the NRV & normalizing as directed by the Engineer in-charge.

4

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Minor welding works: Charges for attending any minor weld defects in lube oil, air and water lines and support structures by welding, etc., as per the direction of Engineer in charge.

20

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GT & GBC Startup Assistance: Charges for assisting starup works in Gas Turbine, Gas Booster Compressor and its axillaries, Maintenance assistance to attend water/oil/gas leak and Air vent releasing in Lube Oil Line and Checking for any abnormalities in the system during the startup as per the direction of Engineer-in-charge.

12

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Gas Booster Compressor suction strainers cleaning (LP & HP).Routine check of any Gas leakages in gas pipe lines flanges Cleaning of Gas Booster compressor LP & HP inlet Gas suction strainers and any other minor works related to the Mechanical Maintenance of the system.

12

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Providing of Dummy Gaskets in the pipelines of GT Compressor during Offline Water Washing and then Normalising. This work involves, dismantling the fasteners from 4" & 8" flanges - 8 Nos. and removal of old gaskets, cleaning the gaskets seating area, providing SS dummy gasket in between flanges and tightening the fasteners in the Gas Turbine Compressor. After completion of Offline Water Washing normalizing with New Spriral Wound Gaskets (Gaskets will be supplied by the TANGEDCO) as directed by the Engineer in-charge.

4

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Running Maintenance for Steam Turbine, HRSG & DM plant equipments

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Regular maintenance works on chemical dosing pumps like cleaning, checking of oil level and topping up of oil, adjusting the stroke length, arresting the gland leak, replacing the damaged gland packing, arresting the leak in valves, etc. and any other works

52

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Overhauling of HP/IP/LP phosphate, ammonia and hydrazine dosing pumps. Dismantling of pumps, clean the dismantled components, replace the worn out parts, assembling and trail run, etc.,

10

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Regular maintenance works on HP, IP and LP Boiler feed pumps like cleaning, checking of oil level, topping up of oil in bearings, cleaning of Lube oil system checking of oil level and topping up of oil in lube oil system, checking and periodical cleaning of mechanical seal coolers, arresting of gland leak in valves and cleaning the valves and checking the C.W. inlet and outlet line etc.

52

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Regular maintenance works on Deaerator cum feed water tank, CST, IBD & CBD, gland steam Condenser, cleaning the suction strainers of all feed water pumps, applying grease in all hand and motor operated valves, easing the valve operation, arresting the steam leak through gland by tightening the gland, replacing the damaged gland packing, checking of IBD, CBD & Flash tanks etc.,

26

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Regular maintenance works on Lube Oil pumps such as MOP, AOP and EOP, Jack oil pumps, cleaning of centrifuge, cleaning of suction strainers of Lube Oil Pumps, MOT checking of oil level, topping up of oil in MOT through centrifuge, arresting of oil leak through gland and in Lube Oil Pumps and in valves, etc

52

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Regular maintenance works on Lube Oil coolers, Lube Oil Filters, Governing system of Steam Turbine, ESV’s, Control valves, like cleaning of LO filters, changing of Lube Oil Filter, external cleaning of Lube oil Coolers, changeover of Lube Oil cooler, arresting of leak in CW inlet and outlet valves, arresting of minor steam leak in valves of STG, replacing the damaged gland packing in leaked valves of STG area. Applying grease in valves and checking the operation of valves in STG area, cleaning of Turbine body and its accessories etc

24

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Regular maintenance works on various sizes of valves in HRSG like arresting of gland leak by tightening the gland, replacing the damaged gland packing, greasing the valves and checking the manual operation of motor operated valves, pneumatic valves & manual valves etc.

120

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Cleaning of HRSG areas by service air, cleaning of hand rails, buck stays, supporting structures and cleaning of pipe hanger supports.

24

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Regular Cleaning and checking of oil level in the ACC Fans, Gear boxes, Hot well Pumps, Condensate extraction pumps and external cleaning of Tube Bundles, Vacuum pumps and its heat Exchangers, Vacuum pump cooling towers and its fans & Pumps, dismantling & assembling of cooling tower fans and attending if any minor leaks, etc.,

104

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Periodical cleaning of Vacuum pump heat exchangers includes complete dismantling of Heat Exchangers plates, cleaning 41 Nos plates of each heat exchanger and removal of Vacuum pump cooling towers PVC fills, cleaning with water & acid for removal of scales and stacking of PVC fills in order

12

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Overhauling of Hotwell pumps, vacuum pump cooling tower pumps and its fans. Dismantling of pumps/fans, clean the dismantled components, replace the worn out parts, assembling and trail run, etc.,

6

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Regular maintenance and cleaning of all types of pumps at DM plant areas, checking of seals and glands, shaft sleeves, Couplings, etc.,

52

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Regular maintenance and cleaning of Air blowers including minor repairs etc

12

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Overhauling of DM plant pumps, De-gasser blowers and air scouring blowers. Dismantling of pumps/blowers, clean the dismantled components, replace the worn out parts, assembling and trail run, etc.,

18

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Regular maintenance such as external cleaning of vessels of Dual media filter and Activated carbon Filter including minor repairs etc,

12

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Regular maintenance such as external cleaning of strong Acid Cation, Strong base anion and Mixed bed vessels including minor repairs etc.

12

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Regular maintenance such as external cleaning of Degasser Tower, Degasser water tank and DM water tank including minor repair etc.,

12

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Regular maintenance such as external cleaning of Hydrochloric acid tank and Caustic soda storage tank including minor repair etc

12

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Regular maintenance such as external cleaning of dilution & measuring tank for SAC, SBA and mixed bed including minor repairs etc.

12

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Regular maintenance of all types of valves in DM Plant such as to attend the gland leaks including minor repairs, etc.,

100

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Regular maintenance of pipes such as attending flange leaks, pipe leaks, changing of gaskets, etc.,

24

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Regular maintenance of Steam and water analysis system (SWAS) such as cleaning, replaced the damaged flexible hoses, arresting of valve gland leaks, etc.

52

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Loading/ unloading / shifting of chlorine toner to Chlorination plant and fitting etc.,

2

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Regular maintenance and cleaning of Filters, Pressure Relief valves, vacuum regulators, various valves in chlorination plant

24

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General cleaning, checking the diesel level in tank, checking & topping the lube oil if necessary, cleaning or replacing the oil & air filters, replacing of belts and checking coolant level in radiator and other auxiliaries

24

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General cleaning all Sump Pumps attends the gland leaks, Greasing of bearings, Inspection and replacement of bearings if necessary, checking of suction & discharge lines and other related works

24

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Overhauling of vertical sump pumps. Dismantling of pumps, leading and lifting pumps from the sump, clean the dismantled components, replace the worn out parts, assembling and trail run, etc.,

6

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Cleaning of 35/5 T and 15/5 T of EOT Cranes, Electrically operated hoists and manually operated Chain pulley blocks and checking the operations, etc.,

12

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Charges for opening of all manhole doors, inside cleaning of HRSG, replacement of asbestos rope & insulation materials for the man hole doors and closing the manhole doors, Inspection of insulation, Checking baffle plates, checking hanger and spring supports, checking pipe supports

1

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Charges for providing assistance during Hydraulic Test of the boiler (HP, IP & LP), including gagging of safety valves, locking of spring hangers, operations of air vents and drain valves, raising the pressure to the hydraulic test pressure, conducting preliminary hydraulic test, inspection for leak and rectification, conducting official hydraulic test and restoration works after hydraulic test as directed by the Engineer-in-charge

1

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Removable of sludges and cleaning of Neutralization pit.This works involves, complete dewatering of Neutralization pit, heap the sludges in the pit, leading & lifting to the Ground level, excavation of earth for dumping of sludges, refilling with excavated earth, cleaning the N-pit completely, etc.,

2

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Removable of sludges and cleaning of Chlorination pit. This works involves, complete dewatering of chlorination pit, heap the sludges in the pit, leading & lifting to the Ground level, excavation of earth for dumping of sludges, refilling with excavated earth, cleaning the chlorination completely, etc.,

1

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Overhauling, cleaning and replacing of materials in Dual media filter/ Activated carbon filter. This works includes are opening of top and side man hole doors, dismantle the bottom drain lines, complete removal of anthracite, sand, gravel and pebbles in DMF and refilling with new materials, etc., complete and assembling of all the dismantled parts in DMF.

2

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Overhauling, checking and cleaning of PP strainers with nozzles in strong acid cation (SAC) /Strong base anion (SBA). For Overhauling, work includes opening of top & bottom man hole doors, dismantle the bottom drain lines, complete removal of resins, checking & replace the defective PP strainers with nozzles if any, assemble all the dismantled parts, filling the Cation resins, etc., (Cation resins and new PP strainers will be supplied by TANGEDCO at free of cost).

2

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Overhauling, checking and cleaning of PP strainers with nozzles in Mixed bed (MB). For Overhauling, work includes opening of top & bottom man hole doors, dismantle the bottom drain lines, complete removal of resins, checking & replace the defective PP strainers with nozzles if any, assemble all the dismantled parts, filling the Cation resins, etc., (Cation resins and new PP strainers will be supplied by TANGEDCO at free of cost).

2

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LPT atmospheric relief diaphragm renewal: Charges for removal of LPT atmospheric relief diaphragm assembly from LP casing of the steam turbine, dismantling the diaphragm, replacement of lead sheet and gaskets, reassembly and installation, as per the direction of Engineer-in-charge, etc.,

2

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Fire protection system, Air conditioning systems and Centrifugal air blower and Operation of Fire water pumps & system

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Operations in Fire water protection system: 1. Checking and maintaining the required water pressure in the fire hydrant and spray system when the pumps are in service. 2. To carry out periodical water flow test in the deluge valves of the spray system. 3. Running of Motor & Diesel Engine driven pumps in Hydrant system for minimum of 5 minutes. 4. Running of Motor & Diesel Engine driven pumps in Spray system for minimum of 5 minutes. 5. Checking of water level in the fire water Reservoir and taking necessary action to maintain the minimum required level. 6. Checking the position of the valves such as suction valve, Discharge valve, Recirculation valve, etc., in each pump.

365

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Regular and Preventive maintenance of Fire water pumps and valves

24

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Regular and Preventive maintenance of diesel engines of fire water pumps

24

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Regular and Preventive maintenance of Hydrant System

24

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Regular and Preventive maintenance of Spray System

24

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Regular and Preventive maintenance of portable and trolley mounted fire extinguishers

24

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Regular and Preventive maintenance of automatic CO2 Flooding System

18

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Cooling towers of A/C

6

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Cleaning of AHU 1&2 filters if centralized A/C units, micro filters of a/c duct and suction filters of centrifugal blower fan.

28

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Cooling towers fins cleaning.

4

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Centralized a/c compressors and air handling units.

48

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Centrifugal blowers fans.

18

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Cooling water pumps of a/c compressors

12

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a) Inspection of split AC unit, for leak tesing using N2 gas and refilling of R22 gas.

12

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b) Inspection of split AC unit, for removal of air fliter, cleaning, inspection and cleaning of air fliter elements

12

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c) Inspection of split AC unit, for opening of external covers of condenser and evaporator, inspection of condensot coils and thorough cleaning

12

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Charges fot Overhauling of AHU 1 &2 in Centralized Ac system

1

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Charges for Cleaning of condensor coils of compressors in Centralized Ac system.

4

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Charges for replacements of Failed compressors in Split AC system.

6

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Labour charges for disassembling, weighing of CO2 Cylinders, assembling the CO2 cylinders to compartment and normalizing the system as per the direction of Engineer in-charge.

1

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Earth work excavation in hard stiff clay, black cotton soil ,hard red earth, shales, murram and all classes of soil for foundation including cost of initial lead, lift, labour charges in cum.

50

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Breakdown maintenance of Hydrant and Spray lines

2

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Refilling with excavated soil and consolidated suitably including cost of all materials, lead lift, etc.

50

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Collection of water samples, dosing of chemicals, drawal of chemicals etc, in DM plant.

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Collection of Raw water samples from the Raw water reservoirs, Fire water reservoirs for various analysis like condy., pH., TDS etc,. once in a day

365

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Operation of chlorination plant and collection of water sample from chlorination plant, potable water overhead storage tank and service water overhead storage tank for residual chlorine. Twice in a day

730

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Collection of water sample from the outlet of DMF and ACF for analysis of residual chlorine, Turbidity, 12 times in a day

4380

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During the Back washing of DMF & ACF, operating the respective valves, blowers etc., once in a day

365

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Collection ofwater sample from Strong Acid Cation outlet, Degasser pump outlet, Strong Base Anion outlet, Mixed bed outlet and DM Tank for analysis of condy., pH, FMA etc. 8 times in a day

2920

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Dosing of Morpholine in morpholine dosing tanks, diluting it with water and mixing well with agitator for dosing at DM water

365

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Transferring of Hcl acid or NaOH lye from lorry tanker to TANGEDCO Bulk storage tank, collecting the respective sample from tanker

6

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Transfer of 32% conc Hcl acid or 48% NaoH lye from the Bulk storage tank to their respective measuring tanks, diluting it with water and stirring well with agitator and operating respective valves and regulating the particular flow rate, and sample collection for checking the required strength, specific gravity, pH etc. for the proper regeneration of SAC, SBA or MB

156

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Dosing required quantity of Lime or Hcl Acid in neutralizing pits for neutralization purpose of DM Plant effluent.

156

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Collection of samples from Neutralization Pit for checking pH and after neutralization, pumping off to the ETP once in a day

365

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Changeover of all continuous running pump, s viz., DM water transfer pump Hydrazine/Ammonia dosing pumps

365

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Operation of Evaporator cooler pumps, Raw Water pumps, DG pumps, DG blowers, Service water transfer pump

365

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During the DM water production, operating the respective valves, blowers etc., of Strong Acid Cation, Strong base Anion and Mixed beds

365

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Dosing the chemicals like ammonia, Hydrazine Hydrate in respective dosing tanks and diluting with water, stirring well with agitator for the dosing of boiler feed water and maintaining the tank level, required concentration etc,. three times in a day

1095

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Dissolving required quantity of Trisodium phosphate in the preparation tank with water, stirring well with agitator and transferring the prepared solution to the TSP dosing tanks and operation of dosing pumps for dosing to HP, IP & LP drums and maintaining the required concentration level

260

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Collection of boiler water sample from the sampling points of CEP., Boiler feed water, Drum samples of HP, IP & LP, saturated steam samples and main steam samples of HP, IP & LP drum for analysis six times in a day

2190

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Collection of feed water sample in dissolved oxygen bottle for dissolved oxygen analysis, three times in a day

1095

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Cleaning and drying the glass vessels like beakers, burettes, pipettes, conical flasks, standard measuring flasks, measuring jars etc. for the preparation of standard solutions, reagents,before and after water analysis, eight times in a day.

2920

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Cleaning of instruments, equipments like conductivity meter, pH meter, Hot air oven,Refrigerator etc. in Main Lab & SWAS Room

365

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Removal of resin from catex bed in SWAS room for the regeneration and refilling the regenerated resin

12

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Dosing of required quantity of antiscalling chemicals in IA/PA vacuum, & Centralized A/c cooling system , two times in a day

730

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Collection of water sample from the IA/PA, vacuum and centralized A/c cooling system, two times in a day

730

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Dosing the Biocide chemical in IA / PA, Vacuum & Centralized A/c Cooling system.

52

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Opening required quantity of water for blowdown from IA /PA, Vacuum & Centralized A/c cooling system, two times in a day

730

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Withdrawal of chemicals like Ammonia, Hydrazine Hydrate, Hydrated Lime, Morpholine and fine chemicals from KGTPS stores and pocket stores to DM Plant, once in a week

52

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Operating various discharge pumps in ETP to green belt area, once in a day

365

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Collection of oil samples from Main oil tanks of STG and GTG for various analysis for deciding the quality of oil, once in a week

52

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Producing distilled water from water still at chemicals lab for the preparation of Lab reagents and Battery use at KGTPS

365

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Shifting / pouring of acid and lye chemicals from the cane to all dilution tanks, once in a week

52

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Sample collection from Evaporative cooling system for analysis of condy., pH, chloride etc,.. during offline water wash activities in Gas Turbine.

20

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Charges for Tools & plants and consumables such as cotton waste, kerosene, soap solution, various sizes of spanners up to 36mm, etc.,

1

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