01/AHD/BTPS/2022-23

Amount

Part-A(Routine maintenance)

Routine maintenance, hammering and choking removal of ESP, APH, FG duct, chimney bottom ash evacuation system of unit No. 4 & 5 of 2x500 M.W. BTPS, Anpara.

Complete evacuation of fully / partially filled APH/FG Duct/Chimney/ESP hoppers of Unit No. 4 & 5 during start up of unit / due to break down of rotary feders / due to break down of Auto/manual rapping system (EERM/ CERM) of ESP.

General upkeep of the DFA extraction plant (located within plant premises) of Unit No. 4 & 5 of 2X500 M.W., ‘B’ TPS, Anpara.

General upkeep of the silo area of DFA Extraction Plant (located out side of plant premises) & Complete cleaning of outer surface of hoppers, walls, equipments of ESP & DFA system and pipe lines in ESP of 2X500 M.W. ‘B' TPS, Anpara.

Part-B(Break down maintenance)

Replacement /revisioning of bearing/rotor/DE & NDE bush / DE shaft/end cover of rotary air lock valve.

Replacement of damaged blade of rotor of rotary air lock valve.

Repairing of damaged/squeezed blades of rotor of rotary air lock valve by gas heating & pressing to bring them back in their original shape/angle.

Replacement of rotary air lock valve by new / repaired one.

Repairing of rotary vane shaft by welding with SS electrode (SS-304) and matching.

Repairing of end cover of rotary air lock valve by filling of material with cast iron electrode in the eroded portion and machining of end cover.

Repairing of cracked cast iron body/flange of rotary air lock valve by welding with CI electrode and machining /grinding of the same.

Servicing of Gear Box of rotary air lock valve including replacement of damaged part if any.

Replacement of Gear Box of rotary air lock valve by new/serviced/repaired gear box.

Attending leakage from ash pan by providing patch and welding with MS electrode.

Minor repairing of large/medium/small flushing apparatus of ESP/APH/FG duct/chimney hoppers.

Replacement / servicing of nozzle tips of flushing pan.

Repairing of deflected / damaged grating of sluiceways / drains of ESP area by cutting and welding / heating with gas and hammering.

Big size : 1300 mm X 1000 mm

Small size : 1000 mm X 1000 mm

Cleaning of ash trenches of ESP area along with tightening of nut & bolts of liners of sluiceways.

Repairing / attending leakages of miscellaneous pipes /discharge pipes, equipment by patch welding with MS electrode.

Repairing of nozzle pipe / nozzle holder assembly of flushing pan.

Repairing of Expansion bellows by hammering, grinding and welding.

Cleaning of trenches of economizer/ APH / FG duct hoppers.

Cleaning of chimney duct hopper trenches and its surrounding area.

Cleaning of main sluiceways of ESP area located at south of ESP.

Replacement / repairing of following wear plates of large/ medium / small size flushing pans :

Base wear plate

Side wear plate

Vertical wear plate

Replacement of gasket / jointing sheet of plate valve installed in transition pipe of large/medium/small size flushing pan.

Replacement of flange gaskets of LP water line / header in ESP area.

Checking & inspection thoroughly inside and outside, cleaning of large size flushing pan after dismantling and refitting of the same.

Checking & inspection thoroughly inside and outside, cleaning of medium and small size flushing pan after dismantling and refitting of the same.

Servicing / replacement of butter fly valves of following sizes:

Servicing / replacement of gate valves installed in service water line of following sizes:

Servicing/Replacement of plate valves of following sizes :

Recouping of flanges / bends /T-bends/ reducers of different size from old / damaged pipe, flushing pans etc. by cutting & smoothening of their rough surface.

Fabrication of M.S. flanges of different sizes from M.S. plate by gas cutting, chipping, grinding & drilling etc.

Fabrication and erection / repairing of steel structure of different steel sections.

Providing tapping of different size M.S. /C.S. water pipe.

Replacement of worn out/damaged MS pipes of following sizes :

12 mm to 125 mm NB

150 mm to 450 mm NB

De-silting/cleaning of various water pipes of following sizes :

80 mm NB to 150 mm NB

Dismantling of pipe/valves, supports etc of various sizes by gas cutting and transportation from site to site store/scrap yard.

Providing of valve / flanges /bends /reducers /'T'-bends in existing / replaced pipe line as per scope of work.

Replacement of damaged gaskets of different sizes of flanges of bottom ash evacuation system of ESP, APH, FG duct & chimney as well as of HP/LP water line.

Replacement of filter cloth and cleaning of fluidizing pads of ESP hoppers

Fabrication & installation of pipe support / clamp of pipe line

Fabrication & replacement of 300 mm NB transition pipes of hoppers of 1st to 3rd row of ESP.

Fabrication & replacement of 200 mm NB transition pipes of hoppers of 4th to 7th row of ESP and FG duct /APH /chimney.

Fabrication & replacement of 200 mm NB transition pipes of hoppers of FG duct /APH /chimney.

Painting with one coat of red oxide primer & two coats of reputed make synthetic enamel paint of approved colour on pipe and steel structure.

Part-C(Fabrication work of ESP)

Fabrication of bellow type expansion joints for 1st to 3rd row of ESP hoppers of Unit No. 4&5.

Fabrication of bellow type expansion joints for 4th to 7th row of ESP hoppers and for APH/FG duct hoppers of Unit No. 4&5.

Erection of bellow type expansion joints for 1st to 3rd row of ESP hoppers of Unit No. 4&5.

Erection of bellow type expansion joints for 4th to 7th row of ESP hoppers and for APH/FG duct hoppers of Unit No. 4&5.

Fabrication of M.S. pipe bends, reducers & 'T'-bends of different sizes.

Fabrication of Large Size Flushing Apparatus including its 250 mm NB discharge bends for 1st to 3rd Row of ESP hoppers of unit # 4 & 5.

Fabrication of small/ medium size Flushing Apparatus of APH/FG duct hoppers including its 150 mm NB discharge bends of unit No. 4 & 5.

Major repairing of large size flushing apparatus of ESP hoppers.

Major repairing of medium size flushing apparatus of ESP hoppers

Major repairing of small size flushing apparatus of APH/FG duct/Chimney hoppers

Erection of Large Size fabricated/major repaired Flushing Apparatus for 1st to 3rd Row of ESP hoppers of unit # 4 & 5.

Erection of small/medium size Flushing Apparatus of APH / FG duct/ESP hoppers of unit No. 4 & 5.

Painting of large size flushing apparatus.

Painting of Small/ Medium size flushing apparatus.

M/s Krishna Engineering Works

SHAKSHI ENGINEERING CO.