NCTPS I SE MI circle Mill Plant Maintenance Division Annual Overhaul work for the year 25 26 Specification No 191 25 26

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 (lengthwise 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, 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 charges for 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 joining 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.(Necessary Pipe (Type -I/II) for rectification will be supplied by TNPGCL and the remaining pipe after rectification will be devoluted to the stores), including cost of consumables and T&P's.

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 venturi vane, 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.