Cleaning of coolers heat exchangers with filtration of turbine oil with allied repair and maintenance works of Unit III at 3 into 35 MW LJHP Baramulla

Amount

Complete Job of Dismantling, Cleaning & Reinstalling of UGB (upper Guide bearings) coolers/Heat Exchangers in Unit III by way of Opening of cooling pipes, Top Cover & removing of excitation cables of the unit so that work can be feasible. Opening of all associated nut-bolts of cooling pipes & UGB coolers. Taking out UGB coolers (08 No, complete set) and placing them at service bay. Fixing of all new associated gaskets/seals for the Job. Opening of UGB brackets so as to check/inspect all UGB pads & packing the same. Cleaning of all UGB tank with cloth & sarees properly. Draining of Turbine Oil from oil bath and cleaning of same and refilling of oil UGB to the marked/appropriate level. Installation of new UGB coolers, if required with new formed proper gasket & seals so as to avoid any leakage. Tightening of all associated Nut & Bolts. Connecting of all cooling pipes in series to the coolers of UGB with fresh gaskets & seals. Ensure proper tightening of all associated Nut & Bolts. Cleaning of Slip Rings & Exciter. Installation of Excitation Cables to the slip ring & assembly. Placing of Top Cover over the shaft of the machine.

Complete Job of Dismantling, Cleaning & Reinstalling of Hot Air coolers/Heat Exchangers in Unit III by way of Dismantling cooling pipes & hot air cooler from the stator frame and lifting them with the help of crane & move them to service bay one by one. Same procedure is done for complete set (08 No.) of coolers. Opening covers from both side of coolers to inspect tubes. Complete cleaning of tubes by water jet and thin steel rod to clear the blocked tubes. After that covers are fitted with new gasket from both sides & testing is to be done by hand pressure pump as per testing standard directions of coolers. Lifting of coolers from service bay to stator frame with the help of crane & tighten all associated nuts one by one. Connecting cooling pipes to the coolers with new gasket. Removing of all materials, dust, etc. from the site. Complete cleaning of chequered plates & top layer of the machine.

Complete Job of Dismantling, Cleaning & Reinstalling of LGB/Thrust coolers/Heat Exchangers in Unit IIII by way of draining of lube oil from thrust bearing and collecting them in empty drums/barrels. Opening of nut & bolts of associated coolers and dismantling 6 No’s (complete set) of Thrust Coolers one by one. Cleaning of all 6 No’s of Thrust coolers one by one by jet stream, rods, etc. for removal of sludge in the Cu-Ni Tubes. Installing & connecting the pipes & coolers one by one to their original positions with new rubber gaskets so that no leakage is permitted. Tightening of all joints & flanges. Pouring of new lube oil into the thrust bearing along with topping up of upper guide bearing by lifting the top cover of alternator from one side. Removal of all materials from working area. Opening of main cooling valve and verify that there is no leakage.

Complete Job of Dismantling, Cleaning & Reinstalling of Turbine guide bearing (TGB) coolers/Heat Exchangers in Unit IIII by way of draining of lube oil from turbine bearing and collecting them in empty drums/barrels. Opening of nut & bolts of associated coolers and dismantling 2 No’s (complete set) of turbine Coolers one by one. Cleaning of all 2 No’s of Turbine bearing coolers one by one by jet stream, rods, etc. for removal of sludge in the Cu-Ni Tubes. Installing & connecting the pipes & coolers one by one to their original positions with new rubber gaskets so that no leakage is permitted. Tightening of all joints & flanges. Pouring of lube oil back into the turbine bearing. Removal of all materials from working area. Opening of main cooling valve and verify that there is no leakage.

Complete Job of Filtration/Dehydration of Turbine oil approx Servo prime 57 (4000 liters) for reuse of the same in the unit.

BHAT CONSTRUCTIONS

LIGHT ENTERPRISES