Annual Maintenance Contract Of Esp Wet Ash Hanling System For Unit -1 At Barh Stpp -I , Esp Wet Ash Handling System , Vac Pp / Blwr ( >20Nm3 ) Serv , Vac Pp / Blwr ( >20Nm3 ) Repl , Vac Pp / Blwr ( Belt ) Repl , Vac Pp / Blwr ( Gland ) Repl , Vac Pp / Blwr ( Pulley ) Repl , Vac Pp / Blwr ( >20Nm3 ) 04W Chks , Coupling ( <> ) Repl , Bends / Laterals ( Dia<=6 ) -Repl , Ms Piping ( Dia<=6 ) Instal / Remove , Ms Ash Line ( Dia>6-12 ) Repl , Collector Tank ( Wettng Hd Nozzle ) Disman , Collector Tank ( Impingement Plate ) Repl , Collector Tank ( Inlet Piece ) Repl , Mhv ( <> ) Repl , Mhv ( <> ) Attend Defect , Ash Valves ( Dia>6-12 ) -Repl , Ash Valves ( Dia>6-12 ) Repair , Lp Valves ( Dia<=6 ) -Repl , Lp Valves ( Dia>6-12 ) -Repl , Structures ( <> ) Fabrication , Misc Works ( <> ) Cutting , Misc Works ( <> ) Welding , Misc Works ( <> ) Attend Defect , Vac Pp / Blwr ( <=10Nm3 ) 04W Chks , Vac Pp / Blwr ( <=10Nm3 ) Serv , Collector Tank ( Air Washer Nozzle ) Clean , Aci Ash Line ( Dia>6-12 ) -Repl , Mhv ( <> ) Foreign Mat Removal