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 Date27 Jan 2025
Closing Date3 Feb 2025
Tender AmountRefer Documents
Costs
EMD
₹ 32,300Document Cost
Refer DocumentsTender Fee
Refer Documents
Summary
Nctps Ii M I Circle Bm Division Unit I Boiler Routine Maintenance Attending Boiler Tube Puncture
Description
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Contact
Tender Id
2025_EB_520899_1Bid Award Id
ViewTender No
CE NCTPS II SE M I O M 266 2024 25Tender Authority
Tamil Nadu Generation And Distribution Corporation Limited ViewPurchaser Address
-Website
http://https://www.tangedco.gov.in/
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Documents
NCTPS II M I Circle BM Division Unit I Boiler Routine Maintenance Attending
BOQ Items
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b) Opening/Closing of manhole doors, leading & lifting of platform to 11 mtr & transporting of ropes to 88 mtrs and providing temporary platform in 11 mtr level assembling of Sky climber inside the boiler
5
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c) Assembling / dismantling of Sky climber and removal of Temporary Maintenance platform / For one No. in 11 mtr inside the boiler:
12
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Charges for shifting the sky climber inside the furnace for access of platen super-heater coils.
5
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Charges for operation of sky climber as per the requirements to assist various overhauling works such as Boiler cleaning, tube thickness survey etc., during the maintenance work period
75
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Charges for renewal of defective boiler tubes of size above 44.5mm OD inclusive of transportation, cutting of defective tubes, edge/spool preparation, welding with IBR welder and assisting for hydraulic test.
170
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Replacing of Oxide scale deposited tubes /bends by new bends/ tubes:
Cutting and removing of Oxide scale deposited re-reheater tubes / bends by arc cutting by using special electrodes for a affected length portion from the coil assembly, edge preparation of tubes ends, Positioning and new tubes/ bends by tag welding. Welding the tube joint with IBR welder. (argon gas, welding generator, TIG set and special welding electrodes will be the scope of contractor) Charges inclusive of cist of consumables and T&Ps.
100
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Tube rectification by window cutting and welding:
Marking of defective tubes identified, cutting of defective portion of tubes, edge preparation, welding of new spool piece with IBR welder. Window cutting on the tube, edge preparation, welding of new piece with IBR welder. Charges inclusive of cost of consumables and T&Ps
6
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Strengthening of existing joints: This work involves identification of less eroded existing joints, transportation of tools & plants and consumables, Grinding less eroded joints and strengthening the joints by welding with IBR welder.
100
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Arc filling
i) Grinding of boiler tubes for arc filling size 150X 25M2 area for 3 layers.
20
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ii) Charges IBR welder for Arc filling of area 25 x 150 M2 by 3 layer.
20
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Charges for fin welding: Charges for fin welding by cleaning, surface preparation and welding.
400
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Skin casing welding and patch work: This work involves removing the refractory, Cutting, the existing skin casing sheet wherever required, welding with new skin casing sheets, arrest the ash leakage. This including the cost of consumables scaffolding arrangements and T&P’s.
5
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Charges for transporting the refractory from stores and unloading at site, leading, lifting, stacking at 7m to 52m elevation of Boiler and removing the waste refractory from Boiler lowering to the ground floor, loading to tipper and disposing at waste disposal area of TPS.
500
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Charges for chipping removal of old defective refractory, cleaning, surface preparation, mixing the refractory with water application and curing the patch worked refractory in Boiler at various elevation.
500
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Providing special type platform to access the rear re-heater coils for the entire re heater bottom area and back pass screen tube area for facilating Oxide scale thickness measurement and renewal of oxide scale formed tubes and for facilitating Reheater vaccum Pulling inspection.
The charges for transportation of scaffolding materials and consumables to the boiler rear arch slope area, erecting at 64mtrs height for a width of 3 mtrs, scaffolding and temporary platform for facilitating attending the above work. After completion work, removing the scaffolding and temporary platform from the area and shifting back the scaffolding materials. Charges inclusive of T&P's and consumables.
30
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Welding in minor damaged portions in Dock house area, pent house area, windbox area, S panel area
50
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Evaluation Notes How It Works ?
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