purchase of various spares for the boiler of unit no.10 and 11 stps,sarni purchase of various spares for the boiler of unit no. 10 and11 stps,sarni , arch tube bend 01 , arch tube bend 02 , arch tube bend 03 , arch tube bend 04 , burner penal tube bends (top) corner no. 01&03 [ 1 set=76 nos. of bends] , burner penal tube bends (bottom) corner no. 01&03 [1set=76 nos. of bends] , burner penal tube bends (top) corner no. 02&04 [1set=64 nos. of bends] , burner penal tube bends ( bottom) corner no. 02&04 [1set=64 nos. of bends] , ash penal bend 01 corner no. 01&03 , ash penal bend 01 corner no. 02&04 , ash penal bend 02 (front and rear) , water wall reducer f 76.1mm to f 63.5mm , economiser hanger tubes locking clips , final superheater bends from (a to l) , vertical platen superheater bends (a to u)