NCTPS I SE MI circle Boiler Maintenance Division Annual Overhaul works for the year 24 25 Specification No 158 24 25

Amount

Overhauling of Boiler HP/LP valves : This overhauling involves dismantling, inspection, rectification of defects if any, lapping of valve seat and disc renewal of sealing rings, gland packing, flange gaskets, and bonnet gasket cleaning all parts, inspection of drive bush, bearing etc. and renewing if necessary and assembling of valves, inclusive Consumables and T&P’s. NB - 65/100/150 mm valves and NRV of class 1500/2500

Overhauling of Boiler HP/LP valves : This overhauling involves dismantling, inspection, rectification of defects if any, lapping of valve seat and disc renewal of sealing rings, gland packing, flange gaskets, and bonnet gasket cleaning all parts, inspection of drive bush, bearing etc. and renewing if necessary and assembling of valves, inclusive Consumables and T&P’s. 40 mm to 50 mm size valves

Charges for overhauling of SH/RH- spray/ LLCV valves, including dismantling, inspection, lapping of valve seat / disc, renewal of spiral wood gasket / gland packing cleaning, freeing of all fasteners, renewing if necessary, assembling the valve and actuators (250 ATA up to 100mm)

OVERHAULING OF DRUM AND SUPER HEATER SAFETY VALVES: This work comprises of dismantling, cleaning, lapping the seat and disc, assembling without disturbing its initial settings. Including consumable and hire charges for T&P's.(SV1,SV2,SV3 & SV5)

OVERHAULING OF RH SAFETY VALVES: This work comprises of dismantling, cleaning, lapping the seat and disc assembling without disturbing its initial settings. Including consumable and hire charges for T&P's. (SV7,SV8,SV9 & SV10)

Seat cutting of 1700 series safety valves (Charges inclusive of special equipment for seat cutting) including consumable and hire charges for T&P's.

Charges for overhauling of MSSV (R & L) of Limitorque actuator Model SMB 3 in 52 mtr of Boiler area by leading, lifting draining Oil, dismantling, cleaning, checking mechanical operation attending minor defects, renewing oil seal, O ring, gasket assembling. Including consumable and hire charges for T&P's.

Overhauling of Electromatic relief valves (ERV): A) Main valve: This work involves dismantling, inspection, rectification of any defects, cleaning lapping the seat and disc, providing hydro test plug and assembling without disturbing its initial settings of safety valves and assisting during pressure setting safety valves & reconditioning of adjusting ring pin. Charges inclusive of labours, T&P’s and consumables, such as lapping past, emery sheet, gada cloth etc

B) Pilot valve : This work involves dismantling, inspection, rectification of any defects, cleaning lapping the seat and disc, providing hydro test plug and assembling without disturbing its initial settings of safety valves and assisting during pressure setting safety valves & reconditioning of adjusting ring pin. Charges inclusive of labours, T&P’s and consumables, such as lapping past, emery sheet, gada cloth etc

Charges for leading, lifting and arranging platform and scaffolding wherever required in the boiler and dismantling after completion of work. Including consumable and hire charges for T&P's.

Charges for safety valve floating by engaging approved agency having done Trevi test, Adjusting the valves for required pressure setting and Producing the Certificate as per requirement. Including charges for test kit, consumables and T&P's.

Charges for removing and assembling the existing burner trip valves (oil/steam) from the respective elevations for valve overhaul works. Including consumable and hire charges for T&P's.

Charges for dismantling inspection, rectification of defects if any, lapping of valves seat, disc & re assembling after overhauling of VSL type burner trip valves, making leak testing and ready for service. Including consumable and hire charges for T&P's.

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. Including consumable and hire charges for T&P's.

Charges for cutting, edge preparation and welding of 1” pipe line, tee elbows, bends in Boiler pressure parts by IBR welder etc. at joints.

Charges for bending of various size of pipes upto 100NB. Charges including consumable and hire charges for T&P's.

Removal of rust and scale formation surface cleaning and two coating of LUMEROUS–HR-47 Aluminium painting on HP & LP, MSSV,16m Valve surface area. (including cost of Aluminium paint, consumables and T&P’s etc.)

ferrofabs (BID ID -1138061)