NCTPS I SE MI circle Mill Plant Maintenance Division Annual Overhaul work for the year 25 26 Specification No 119 25 26

Amount

MDVs, MPOs, Mill outlet Elbows and Classifier Blades – Overhauling work for HP 803 Bowl Mill Providing support for coal pipe above the mill, dismantling and lowering of 1 No. MDV to mill floor at 2.52 mtrs for inspection of internals and lifting of either new or repaired or modified one no. MDV to position and coupling with coal pipe and releasing of supports including patch welding cost of consumables and T&P's.

Charges for hard facing of Mill Discharge valve inside (length wise and circle wise) at 15mm equal distance, 2 runs overlapping including cost of consumables and T&P's.

Dismantling and lowering of 1 No. MPO to mill floor at 2.52 Mtrs. For inspection of internal and renewing the worn-out components if necessary and lifting of either new or repaired MPO to the position and coupling with mill discharge valve including cost of consumables and T&P's.

Charges for hard facing of MPO inside the body in longitudinal direction of coal air mixture Flow direction as per the instructions of Engineer in charge, including cost of consumables and T&P's.

Charges for dismantling the old worn out orifices on mill top assembling of new/old Orifice including hard facing positioning including cost of consumables and T&P's.

Charges for arresting the coal pipe firmly, dismantling victaulic coupling and lowering down the mill outlet elbows to 4.5 m. floor including scaffolding, cost of consumables and T&P's.

Charges for inspection of mill outlet elbows and changing the deflector block if any lifting the elbows and assembling with proper alignment with the existing pipe line and removing coal pipe supports and devolution of scraps to stores, including cost of consumables and T&P's.

Reconditioning of worn out defective centre coal feed pipe style I, II & SS chute - Cutting and removing the worn-out portions from the released centre coal feed pipe TYPE-I & II and joninig together the usable portions by welding and make them as TYPE-I, II & SS Chute suitably as per site requirement, devoluting to stores, Fabrication and machining of M.S Flange dia 620mm X 20mm thick aligning, edge preparation and welding with pipe including cost of materials T&P’s and consumable. (Necessary Pipe (Type -I/II) for rectification will be supplied by TNPGCL and the remaining pipe after rectification will be devoluted to the stores).

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 including cost of consumables and T&P's.

Charges for fixing of new venturivane,patch welding and assembling the venturi outlet assembly, venturi outlet conical collar assembly with coal feed pipe and the mill top including cost of consumables and T&P's.

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,including cost of consumables and T&P's.

Overhauling of Classifier System by removal of Classifier spherical bearing links,Overhauling and retapping the sockets, replacing of worn out studs and nuts and synchronising the operation of Classifier Control Vanes Inner and Outer of the mill, including cost of consumables and T&P's.

Charges for Dismantling of separator body top along with classifier assembly and reassembling the separator body top as per direction of engineer in charge. This includes cutting, bending, replacing wornout liners, making the fixture for lifting arrangements, lead, lift retaping and cleaning the threaded holes in the flange etc. including cost of consumables and T&P's.

JJ POWER ENGINEERS (BID ID -1406081)