Tamil Nadu Generation And Distribution Corporation Limited Tender
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Tamil Nadu Generation And Distribution Corporation Limited - TANGEDCO Tender
Machinery and Tools
Eprocure
Opening Date11 May 2023
Closing Date25 May 2023
Tender Amount₹ 16,27,246
Costs
EMD
₹ 16,200Document Cost
Refer DocumentsTender Fee
Refer Documents
Description
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Contact
Tender Id
2023_EB_313509_1Bid Award Id
ViewTender No
SE/O/TTPS/Spec.No.107/23-24Tender Authority
Tamil Nadu Generation And Distribution Corporation Limited ViewPurchaser Address
-Website
http://https://www.tangedco.gov.in/
GEM & Bid Advisory Services
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Documents
TTPS Operation Circle MPM I Unit III Overhauling of Mill gear box, under bowl, separator top assembly etc., of Mills during the forthcoming overhaul
TTPS Operation Circle MPM I Unit III Overhauling of Mill gear box, under bowl, separator top assembly etc., of Mills during the forthcoming overhaul
BOQ Items
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Charges for dismantling and removing worn out thrust bearing of Mill vertical shaft by gas heating the racer, cleaning the bearing seating area in the vertical shaft and assembling back new thrust bearing after heating the racer in oil bath.
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Charges for Renewal of thrust bearing adopter by oil heating and using necessary fixture for assembling the adopter in correct position after positioning the shims below the worm gear hub lock nut. Removing the thrust bearing adopter (worn out) and assembling the new adopter by heating.
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Charges for Dismantling of upper skirt assembly, lower skirt assembly, Mechanical face seal assembly, dust guard and blue matching of seal runner, renewal of seal (bronze), air seal, dismantling of Mill bottom cover, upper bearing housing cover, oil seals etc., Complete overhauling, assembling back the lower skirt assembly, scrapper assembly and arresting the oil leakages in the return line and also spillage’s at the rear side of gearbox to prevent Mill fire including cleaning and tapping the threaded holes.
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Charges for dismantling the gear coupling bolts, gear coupling (worm shaft only), distance piece, unscrewing the worm shaft extension cover bolts and bearing housing cover bolts, removing the worm shaft extension cover, lowering to ground floor, releasing the worm shaft assembly from its position and assemblies providing back the overhauled worm shaft assembly in the gear box and fitting back the worm shaft extension cover, bolting and tightening the bolts to the required torque level and assembling back the gear coupling bolts, distance piece etc.
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Charges for checking the bearing clearance after dismantling the thrust bearing and radial bearing housing covers, removing the bushes, springs etc. thoroughly cleaning the bearing housings and other components inspecting the thrust bearings, resetting the axial clearance by reducing the thickness of shims in the thrust bearing housing cover, providing of new shims and by trial method adjusting the clearance to 0.10 mm to 0.15 mm. Assembling back the thrust and radial bearing housing properly and renewing the gland studs and gland packing in the worm shaft assembly.
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Charges for changing the worm shaft thrust bearing after gas heating and releasing the old bearings from the worm shaft, heating the new bearing in oil bath and providing the new bearing in the worm shaft in proper position.
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Charges for renewing radial bearing in the worm shaft after gas heating and releasing the old bearing and providing new bearing in the worm shaft after heating the bearing in oil bath.
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Charges for dismantling the radial bearing after removing the oil pump hub and oil pump bushing and reassembling the new radial bearing in the new/old radial bearing housing and assembling the new/old pump hub and bushing.
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Charges for changing worn out scraper pin, bush, pin cover, re conditioning of scrapper, cleaning of under bowl, checking of clearance, inspection and welding of wheels support lugs, wall side liners etc in mill under bowl.
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Dismantling of worn out classifier assembly, inspection of deflector blade, cleaning, replacing of worn out deflector blade components renewal and assembling of new classifier assembly with its links. The overhauled classifier assembly was checked from 0 to 6 positions and ensured that the deflector blades, links move correspondingly to its position without any malfunction.
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Charges for dismantling the Spool pieces, multiple port outlet bodies and transition pipes 4 Nos. each after assembling the coal pipe inspection with center feed pipe structures including transportation of supporting material from stores to site and refixing the Spool piece, MPO bodies and transition pieces and assembling to its original position and carrying out necessary related works. And devolution of scraps to stores etc. for a mill
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Charges for removal of orifice 1 No. after dismantling the victaulic coupling, inspecting and inverting the same orifice or new orifice and assembling in position.
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Dismantling the mill top, cutting the centre feed pipe to the required length so as to lift eroded inner cone and brought it to 4.5 Mt. level as per the direction of Engineer in charge.
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Charges for dismantling the eroded inner cone from mill top and assembling the new / reconditioned inner cone.
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Charges for dismantling the drum section of inner cone from mill top and replacing the new/ reconditioned one
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Charges for dismantling venturi outlet assembly from mill top with the removal of venturi outlet, venturi vanes, venturi outlet conical collar assembly, coal feed pipe and devolution of scrap to stores.
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Charges for fixing of new venturi vane and assembling the venturi outlet assembly, venturi outlet conical collar assembly with coal feed pipe and the mill top.
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