To carryout annual routine, periodical and breakdown maintenance contract works in Mechanical division at Thirumakottai (K) GTPS.

Amount

Regular maintenance works in Cleaning of NDE/DE mechanical seal cooler, cooling water lines and valves of HP/IP/LP BFPs/cleaning of lube oil pump coolers of HPBFP’s motor as directed by Engineer.

Regular maintenance works in Cleaning of STG Lube oil centrifuge bowls / booster pump NRV / lube oil lines & filters / replacing of spare parts / attending leaks in valves and fittings as directed by Engineer.

Regular maintenance works in Cleaning of all equipments of STG and its auxiliaries / topping up of lube oil in all pumps / topping up of lube oil in MOT as directed by Engineer.

Regular maintenance works in Cleaning of vacuum pump heat exchanger / applying grease in bearings / renewal of gland rope in pump as directed by Engineer.

Regular maintenance works in Dismantling, cleaning & assembling of filters such as control oil filter in governing system (or) duplex filter in lube oil system as directed by Engineer.

Regular maintenance works in Attending leaks in high pressure valves up to size 1” in STG as directed by Engineer.

Regular maintenance works in Attending leaks in high pressure valves of size 50 to 100 NB in STG as directed by Engineer.

Regular maintenance works in Cleaning the Suction strainer of EOP/AOP/MOP/IP BFP/LP BFP/HP BFP/CEP as directed by Engineer.

Regular maintenance works in Cleaning of hydrazine dozing tanks, flushing of lines / attending leaks in valves and flanges / renewal of gland ropes in pump as directed by Engineer in charge.

Regular maintenance works in Attending leaks in pipelines /Renewal of pipelines / renewal of valves up to size 1” in STG area by welding as directed by Engineer.

Providing assistance for maintenance and operation related activities during start up of STG to put the machine on grid as directed by Engineer.

Replacing of Low Pressure Turbine Diaphragm lead sheet when ever rupture the Diaphragm sheet as directed by Engineer

STG turning gear manual operation from turbine standstill condition whenever necessary as directed by Engineer.

General overall cleaning of all equipments like centrifugal pumps, air compressors, blowers, tanks, pipe lines etc., and keeping the area clean and tidy as per direction of engineer in charge.

Replacement of coupling/checking alignment / Attending gland leak in pumps / greasing of bearing / Attending leaks and topping up of oil / level gauges maintenance as per direction of engineer in charge.

Maintenance of air blowers / Degasser blowers Degasser towers in DM plant and RO plant as per direction of engineer in charge.

Maintenance of Dual media filter / UF skid / RO skid /Activated carbon filter/Strong acid cation beds / Strong base anion beds /Mixed beds including minor repair works as per direction of engineer in charge .

Unloading of Sulphuric acid / Hydrochloric Acid / Sodium Hydroxide from tanker to storage tank in DM plant/Unloading of Hydrochloric acid from tanker to storage tank in RO plant as per direction of engineer in charge.

Maintenance of Air compressors like replacement of belts /replacement of oil and suction filter element in air Compressors /replacement of cartridge filters / DMF bucket filter/replacement of PVC pipes and fittings / HDPE pipe and fittings etc., as per direction of engineer in charge.

Loading / Unloading of Chlorine cylinder from lorry / Mobilizing chlorine cylinder to CW/RW chlorination plant and keeping them in service/Attending leaks /Replacing spares including minor repair works in CW/RW chlorination plants as per direction of engineer in charge.

Maintenance of all types valves of size up to 100 mm including attending minor repair works as per direction of engineer in charge

Maintenance of all types valves of size Above 100mm including attending minor Repair works as per direction of engineer in charge.

Regular maintenance works in Attending leaks in pipelines/ Renewal of pipelines / renewal of valves up to size 1” in DM & RO Plant area by welding as directed by Engineer.

General Maintenance Works: General cleaning / greasing / topping up of oil in system /operation of centrifuges, loading and unloading of materials and attending Periodical maintenance works of GT, GBC & IA/PA and all its auxiliaries as directed by the Engineer in charge.

Natural Gas Booster Compressor: Attending Periodical maintenance works of Gas Booster compressor system like attending leak arresting works in lube oil, gas and cooling water lines, replacement of filters, Cleaning of gas line strainers and other minor works etc related to this system as directed by the Engineer in charge.

Gas Conditioning Skid: Attending Periodical maintenance works of Gas conditioning skid, collection of condensates/ replacement of filter elements/ attending leak arresting works in the system / replacement of strainers, cleaning and other minor works etc related to this system as directed by the Engineer in charge.

Gas Turbine and its support system: Attending Periodical maintenance works of the Gas Turbine and its accessories like Lube oil skid, hydraulic oil system, mist eliminator system, Gas skid, Inlet Air filter system, Exhaust system and Water wash pump system of Gas Turbine / water injection system/ mist eliminators/ maintenance of lube oil centrifuges and attending leak arresting works in the GT system and other minor maintenance works etc related to this system as directed by the Engineer in charge.

Instrument Air and Nitrogen system: Attending Periodical maintenance works of IA/PA compressor system, cleaning of Radiator cooler and coolant strainer, ADUs and N2 system, Cleaning of water jackets using water and air, Fly wheel belt replacement, tightness checking & normalizing, Water drain traps cleaning and assembling, painting and attending leak arresting works in the system and other minor works etc related to this system as directed by the Engineer in charge.

Coordinating with operation during startup /shutdown of the unit for change over of the equipment's and Manual open/closing of GT diverter damper.

Cleaning of all types of pumps, CT fans , greasing of bearings topping up of oil, attending gland leak etc and assisting for loading & unloading the materials as directed by Engineer-in-charge.

Inspection and Cleaning of suction strainers in ACW pump / CCW pump and Inspection and Cleaning /replacement of NRV in ACW pump /CCW pump/ CT makeup pump as directed by Engineer-in-charge.

Regular maintenance and cleaning of gear box provided for the Butterfly valves including minor repairs like renewal of Bolts & nuts etc., as directed by Engineer-in-charge.

Regular inspection and general cleaning of hydro system provided for CT such as cooling fills, drift eliminators, header spray nozzles & distribution pipe including minor repairs such as renewal of damaged spray nozzles and bolts & nuts etc., as directed by Engineer-in-charge.

Regular Maintenance of CT fan assembly and its auxiliaries such as gear box transmission shaft, CT fan blade & inspecting blade angle including minor repairs such as renewal of drive shaft, coupling bush, oil seal replacement& alignment etc., as directed by Engineer-in-charge.

Inspection and renewal of coupling bush of various pumps such as CW Pump, ACW pump, CT make up pump CCW pump ,inspection /cleaning of Blower fan inlet air filters, Belt tightness checking etc., as directed by Engineer-in-charge.

Regular maintenance and cleaning of valves of various types of size below 4” including minor repairs such as renewal of clamping ring hex bolts, hand wheel etc., as directed by Engineer-in-charge.

Regular maintenance and cleaning of valves of size 4” to below12” of various types including minor repair such as renewal of clamping ring hex bolts, hand wheel etc as directed by Engineer-in-charge.

Regular maintenance and cleaning of valves of size from 12” to 36” of various type including minor repairs such as renewal of clamping ring hex bolts, hand wheel etc. as directed by Engineer-in-charge.

Renewal of gland packing in Auxiliary Cooling water pumps and Closed Cooling water pumps as per the Direction of Engineer in - charge

Attending of minor leaks by patch welding in the bore well pipe lines of various sizes at various locations in BOP area as per the Direction of Engineer in - charge

AC & HRSG

Maintenance of HRSG system & All The A/c systems: Routine inspection, periodical maintenance of HRSG impulse, feed water, steam IBD and CBD pipe lines and valves, etc., and Routine Inspection, checking the parametres, any abnormal noise& leak in all the A/c Systems as per the Direction of Engineer In-charge.

Maintenance of 60TR-centralised A/c system for central control room Charges for attending leak in the system by testing with N2 Gas and refilling of R22 Gas and replacement of oil seal in the centralized A/C Plant as per the direction of Engineer in charge.

Charges for manual descaling of condenser unit in centralized A/C System using wire brush as per the direction of Engineer in charge.

Charges for cleaning the Air handling Unit Blower Fan, replacement of V Belts, greasing of bearing and cleaning of filter elements etc., in centralized

Charges for attending gland leak, topping up of oil replacement of bearing etc., in condenser Cooling water Pump of centralized A/C System as per the direction of Engineer in charge.

Charges for cleaning the Cooling Tower Fills, checking the alignment of Cooling Tower Fan blade, motor etc., as per the direction of Engineer in charge

Maintenance of 15 TR packaged A/c unit at switchyard control room.Charges for attending leak in the System by testing with N2 Gas and refilling of R22 Gas in the 15 TR packaged A/C unit of Switchyard Control Room as per the direction of Engineer in charge.

Charges for servicing the condenser outdoor unit of the 15 TR packaged A/C unit at Switchyard Control Room as per the direction of Engineer in charge Maintenance of SPLIT & TOWER A/c unit at various locations

Maintenance of SPLIT & TOWER A/c unit at various locations: Charges for attending leak in the system by testing with N2 Gas and refilling of R22 Gas replacement of electrical spares etc., in the split A/C & tower unit as per the direction of Engineer in charge.

Charges for servicing of condenser outdoor unit of the split & tower A/C unit as per the direction of Engineer in charge

Maintenance of window A/c units at various locations Charges for servicing 1 No. window A/C unit once in 3 months (or) replacement of Electrical spares etc., as per the direction of Engineer in charge

Attending leaks in high pressure valves from ½" to 1½ '' in HRSG: Attending leaks in valves from ½" to 1½ by renewal of Gland packing and flange gaskets etc as per the direction of Engineer in charge

Attending leaks in high pressure valves of size 2" to 4" in HRSG: Attending leaks in valves of size from 2" to 4" by renewal of Gland packing and flange gaskets etc as per the direction of Engineer in charge

Regular maintenance works in Phosphate dosing tank cleaning, flushing of lines/ attending leaks in valves/flanges / renewal of gland rope in pumps, loading and unloading of materials as per the direction of Engineer in charge

Charges for dismantling the sample coolers (HP/IP/LP) from its original position, lowering downing end cleaning of inlet and outlet valves, releasing the choked cooler bundles thoroughly using HCl acid and assembling again into original position, as per the direction of Engineer in charge.

Attending leaks in pipe lines / renewal of pipe lines/ renewal of valves upto 1½ '' in HRSG Weld joints as per the direction of Engineer in charge

Attending leaks in pipe lines / renewal of pipe lines/ renewal of valves from 2" to 4" in HRSG Weld joints as per the direction of Engineer in charge

FIRE & SAFETY

Operations in Fire water Pump House: i. Checking and Maintaining the required water pressure in the Fire Hydrant and Spray systems. ii. To carry out periodical water flow test in the deluge valves of spray system. iii. To inspect the Running of motor and diesel engine driven pumps in hydrant system. iv. To inspect the Running of motor and diesel engine driven pumps in spray systems v. To carry out trial run in Fire water Pumps once in a week.

Regular and preventive maintenance of Fire water pumps, Fire Hydrant & Emulsifier lines, Diesel Engines, Branch pipes and nozzles, Fire hoses, hose boxes,Single headed hydrant valves, isolation valves, deluge valves, etc, of the entire fire fighting system and loading and unloading of materials as per the direction of Engineer In-charge.

Upkeepment and routine maintenance of Portable Fire Extinguishers (DCP, CO₂, Foam type) and trolley mounted Fire extinguishers (DCP, Foam type) as per the direction of Engineer In-charge.

General cleaning of cranes/hoists, General inspection and cleaning work in ETP&STP area, general cleaning and preventive maintenance works in DG set at T(K)GTPS as per the direction of Engineer In-charge.

To carry out assisting and upkeeping the stores at T(K)GTPS by carrying out the following works: a. Receiving and collecting of the supply materials as per the supply/ Purchase order. b. Segregate the materials and arranging. c. Cleaning the materials and up keeping the materials. d. To help the stores Officer for the periodical inspection & verification and providing the necessary assistants for any other unforeseen minor works related to the stores as directed by the stores supervisor. e. Preparing the Inventory of the store and computerizing the spares and materials inclusive of T&P’s & consumables

Attending minor leaks in 200NB, 150NB, 100NB & 80NB Fire water Hydrant and Spray pipe lines at various locations at T(K)GTPS

DM-RO OPERATION

Collection of sample from the acid tanker for checking specific gravity and concentration before unloading of 33% concentrateted hydrochloric Acid (or) 48% concentrated Caustic soda Lye (or) 98% Sulphuric Acid.

regular transfering of 33 % concentrated Hydrochloric Acid (or) 48 % concentrated caustic soda Lye from the Bulk storage Tank to its respective measuring Tank,diluted with water and stirring well with agitator for the Regeration of ion exchanger beds and for operating the ion Exchanger regeneration line valves and for collecting samples during the regeneration.

Regular starting (or) stopping operation related works of(a) ion exchanger beds

(b) potable water systems

(c) RO plant system

Regular and periadical collection of Water samples from(a) ion exchanger beds

(b)RO plant systems for routine analysis

(a) Regular transfering of required quantity of Marpholine / poly Electrolyte / 33% Hydrochloric Acid / Sodium meta bisulphate / Antiscalent / Sodium Hypochloride,caustic soda lye from its container, adding into its respective dosing tank,diluting well with water and stirring well with agitator for the dosing of DM and RO plant

(b) Regular transfering of required quantity of cooling water dosing chemical of antiscalent corrosion inhibitor and oxidiing biocides taken from its container adding into its respective dosing tank diluting with water and stirring well for the cooling water system

Regular starting and stoping operation related works of Blower for the proper neutraliation of Regenerate water and RO reject water collected at neutraliation pit and collection of sample from N.Pit for testing before stariing the disposal pump

Regular collection of required quantity of Ammonia-Hydrasine hydrate,tri sodium phosphate, adding into its respective preparation tank dilutting with water,stirring well with agitator and then transfering the solution to its dosing tank for the dosing of feed water and Boiler drums

Regular and periodic collection of Water samples from DM tanks and condensate , Boiler feed drums,saturated and main steam of HP,IP and LP for routine analysis

Regular transfering of 98%concentrated sulphuric Acid from bulk storage tank to its measuring tank for the dosing of cooling water and starting and stoping operation of sulphuric Acid dosing pumps

a)Regular collection of samples from CT Recirculation water , CT make up water and Raw water reservoir for routine analysis

b)Regular collection of samples from Raw water chlorination for check the free chlorine

Regular and periadical collection of oil samples from lube oil tank of Gaas Booster compressor, Gas turbine, Steam turbine Generator (or) collection of water samples from shallow borewells , Deep borewells and effluent treatment plant for analysis

Regular washing, adding with chemicals of Sodium Hypo chloride, Hydrochloric acid, and caustic soda Lye in dilution Tank and transfer to UF membrane for chemical cleaning process carried out for Ultra Filter membrane .