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 Date18 Dec 2023
Closing Date2 Jan 2024
Tender AmountRefer Documents
Costs
EMD
₹ 39,700Document Cost
Refer DocumentsTender Fee
Refer Documents
Description
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Contact
Tender Id
2023_EB_401118_1Bid Award Id
ViewTender No
OT 158Tender 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
Overhauling of coal mill G H Replacement of Roller tyres Grinding table segments Spool pieces coal bends cutting and renewal of worn out damaged mill classifier top cover plate etc
BOQ Items
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Charges for refixing the coal bend with rectified distance piece in position, aligning with 660 mm spool piece collar & horizontal coal pipe collar and welding, cutting & removing all the coal pipe temporary supports, reclamping the hanger supports and removing the scaffolding arrangements etc…
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Removal of Classifier Ladder, steam quenching line and seal air line : Charges for cutting, dismantling & reassembling the ladder, steam quenching line, seal air pipe line, seal air actuator, inspection of seal air isolation valve, service air line, hand rails, etc from the respecting mill to repair bay and vice versa after providing of necessary scaffolding arrangements.
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Providing of Scaffolding/Temp. Platform for loosening the bolts & nuts:
Charges for providing & dismantling the necessary temporary platform/ scaffolding arrangement for detach the bolt and nut of the classifier assembly, checking and Inspection of asbestos rope if any damages to be replaced fixing the bolt & nut up to required torque wringe tight after setting the correct position of the classifier at outside of the mill bottom assembly etc...
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Removal of Classifier Assembly :
Charges for dismantling, leading, lifting and transporting of classifier complete assembly from the respective mill housing bed to repair bay after loosening of all bed bolt & nuts including the cost of fabrication of special type lifting hooks, additional shackles and fixtures etc…
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Locking the Roller Assembly :
Charges for locking the 3 Nos. of Mill roller tyre by using locking key & mounting the mill bottom housing, screwed the bolt & nut for locking the grinding rollers etc.,
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Dismantling and reassembling the loading frame Charges for marking the initial setting positions of the loading frame, dismantling the hydraulic unit, screwed connection, connection plate, pressing plate, tension rod, special type large size pin bolts, lift the loading frame by using the crane, special type of hydraulic jack and the chain block, move and lower down to the respective mill to repair bay ground floor and reassembling the hydraulic unit & loading frame complete assembly after setting the correct position and finally adjusting the required clearance between the table segment and bottom of the roller tyres and renewal of various sizes packer plates are to be renewed if necessary etc.,
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Dismantling and reassembling of 3 Nos. of fulcrum assembly :
Charges for marking the initial setting positions, dismantling the special type of large size pin bolts, bolt & nuts of fulcrum assembly, remove the connection plate, pressing plate, lift the fulcrum seat by the chain block, move and lower down to the ground floor and reassembling the fulcrum assembly after setting the correct position level etc.,
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Dismantling the grinding roller assembly Charges for marking the initial setting positions of grinding roller assembly, attach the lifting hooks connected to the grinding rollers, remove the special type of large size pin bolts, dismantle the roller from the fulcrum assembly, lifting, leading and transporting to repair bay etc…
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Charges for dismantling the roller tyre from the inside mill housing assembly one by one, unscrew the retaining ring, fabrication of the puller devices, if not come free heat the tyre after dismantle the roller tyre from the assembly, inspection, replacement/ rectification, dismantle the thrust piece, breath device, end cover if not come free apply heat and dismantling thrust piece, checking the fixed ring, movable ring if any damages replace/ rectification of the new sealing ring and grinding roller tyres if necessary etc.,
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Charges for dismantling & renewal of grinding roller cylindrical bearings after loosening, bearing cover, ‘O’ ring, shaft steel ring, stuffing box, removal of drain plugs for draining the bearing lubricating oil and checking & inspection of the bearings if any damages replace the bearings, ‘O’ ring, of the grinding roller shaft and restoration etc., (Bearings will be supplied by board at free of cost)
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Dismantling of grinding table segment:
Charges for dismantling of grinding table segment one by one by removing the cuneiform bolt & nut, knot and dishing spring washers from the nozzle ring and dismantle filing screws, insert the pressure screws and dismantling the bull ring segment 12 pieces from the base table, fabrication of special type lifting hooks, to lift by lifting device and crane, move, lower down the ground floor, clean & inspecting the supporting tray etc.,
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Assembling of grinding table segment: Charges for positioning and reassembling the new/existing grinding table segment, cuneiform bolt & nut, knots and dishing spring washers from the nozzle ring and mounting filing screws, remove the pressure screws and mounting the bull ring segment 12 pieces laying over the base table one by one. etc.,(Fabrication of necessary special type lifting hooks, lifting devices, etc. are under contractors scope)
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Re assembling of Grinding Roller Assembly :
Charges for leading , lifting, transporting and lowering of grinding rollers one by one from repair bay to respective mill housing by using special type of lifting hooks & lowering in to the mill housing one by one, reassembling the grinding roller tyre set without changing the initial setting position etc.,(Fabrication of necessary special type lifting hooks, lifting devices, required quantity of special type hydraulic jack units etc. are under contractors scope)
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Reassembling of Classifier Assembly and Trail run Charges for transporting the classifier assembly from the repair bay to respective Mill, positioning & reassembling to the mill housing top flange, refixing the seal air line, steam line, ladder and trail run of the Mill unit with minimum vibration and noise etc..
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Charges for cutting the existing worn out mill classifier top dia 3536 mm cover plate, transporting the same to repair bay, clearing the cutting burrs over the classifier inner circumference area, grinding the surface etc…
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Material charges for dia 3536 mm x 32 mm tk. M.S. plate & dia 800 mm x 20 mm tk. M.S. plate for fabrication of 10 Nos. flanges for fixing the coal carrying pipe flanges etc…
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Charges for marking, cutting, machining, drilling and tapping the dia 20 mm holes x 24 Nos, M.S. fabricated flange of size OD 800 mm x ID 600 mm x 20 mm thick - 10 Nos.
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Charges for marking & cutting the new 32 mm thick M. S. plate of required size 3536 mm, grinding the outer circumference, marking, cutting & grinding the dia 600 mm holes x 5 Nos. and dia 1400 mm x 1 No. over the 32 mm tk. M.S. plate for fixing the coal pipe & centre feed pipe, welding the fabricated flange of size dia 800 mm x 10 Nos. below & upper side of classifier top plate by 3 runs of welding etc…
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Charges for welding the eye bolt 4 – Nos. over the 32 mm tk. M.S. plate, transporting the new 32 mm tk. M.S. plate from mill repair bay to respective mill floor, positioning the M.S. plate over the classifier top, checking the plate surface level, initial setting height etc… and finally 4 runs of welding to the classifier body etc…
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