Complete Overhauling Of Bottom Ash Hopper And Its Connected Parts Such As Seal Trough, Seal Plate, Flushing Nozzle, Drip Shield, Refractory Cooling Pipes Etc. On As & When Required & Aoh-Coh In Ash Plant Unit 3 To 5 At Ukai Tps.(Wt-4725 Ahp-Ii)