08/AHD/BTPS/2020-21

Amount

Thorough checking & cleaning of fly as deposited in ash conveying pipe of DFAES from ESP hoppers of unit No. 4 to their respective transfer tanks and from transfer tanks to silo tank (Approx. 1600 R m)

Complete evacuation of transfer tank / silo tank of unit No. 4

Dismantling, servicing and recommissioning of old equalizing valve / replacement of complete valve with the new one

Servicing of upper/lower rotary segregating (dump gate) valve of transfer tank / replacement of complete valve with the new one

Cleaning / replacement of bags and cages of transfer tank

Cleaning / replacement of bags and cages of the silo tank

Servicing of material handling valve (MHV) including replacement of slide plate and disc

Cleaning of target box and water tank of safety valves of silo tank of Unit # 4 ( one job means cleaning of one No. target box and one No. water tank)

Repairing of eroded valve disc of cross over valve/discharge valve of 200mm NB

Complete servicing of silo cross over valve/ silo inlet valve/silo discharge valve (size: 350/300NB, Type: slide plate)

Removal of fallen bags filter from transfer tank by opening of two No. fluidizing pad / RSV

Repairing of damaged cages of transfer/ silo tank

Repairing of damaged bags of transfer/ silo tank

Complete servicing / attending breakdown including replacement of NRV & eroded orifice of TAC conveying line

Repairing of transfer tank / pipe line and other equipment by patch welding

Servicing of vacuum breaker valve/ segregating valve ( size: 200mm NB)

Replacement / Servicing of the fluidizing pads of transfer tank/silo tank

Replacement of M. S pipe of vacuum pump / transfer tank

Replacement of G.I. pipe of size: 15/25/50 mm NB

Fabrication of M.S. bend of following sizes:

Fabrication of M.S. reducer of sizes 125 mm / 100 mm

Replacement of M.S. bend of following sizes.

Replacement of M.S. reducer of sizes 125 mm / 100 mm

Servicing/replacement of gate valve of size 100 mm NB installed in conveying air line of transfer tank

Servicing of NRV of size 100 mm NB installed in conveying air line of transfer tank

Repairing of C.I. valve body of equalizing valve

Repairing of S.S. seat of equalizing valve

Repairing of S.S. disc of equalizing valve

Repairing of C.I. valve body of gate valve / NRV of size – 100 mm NB

Repairing of seat / disc of C.I. gate valve / NRV of size – 100 mm NB

Servicing/ Replacement of gate valve of following sizes :

Replacement of jointing seat of flanged joint of rotary segregating valve

Fabrication of miscellaneous steel structure / platform from DFA Transfer tank to silo

Removal of choking of dry fly ash pipe line at different location including attending leakages by opening the V-J Coupling

Removal of choking of Bend / Replacement of gasket of flanged joints of dry fly ash pipe lines at different locations including attending leakages

Disposal of fly ash waste up to a distance of 3.0 km including sweeping, storage, loading, transportation and unloading

Replacement / checking and refitting of 60 deg. / 90 deg. basalt lined bend / Y-Joint of DFA System

Gas cutting of pipe / plate etc.

Replacement of C.I. pipe branch of following size:

Replacement / checking and refitting of basalt line pipe of Size : 275 / 300 / 350 mm

Replacement of V-J coupling & coupling gasket including alignment of pipe of basalt lined pipe line of DFA system

Turning of 200 mm, NB C.I. pipe line

M/S NISHA ENTERPRISES

A.K. CONSTRUCTION CO.