tender for fabrication, testing and supply of of complete economiser coil for boiler of unit no. 11 stps,sarni of 250mw- 1 complete economiser coil for 250 mw bhel make boiler of unit no. 11, stps, sarni. 2 fabrication, testing and supply of economiser single coils module - mark 01(only) consist of upper & lower bank single coils module (to be deliver in 2 compartment) made out of cold drawn seamless carbon steel boiler tubes tube size: 44.5 mm od x 5.6 mm thicknessmaterial – carbon steel confirming to sa210 gr. cbanks – 2 (upper and lower bank)longitudinal pitch (sl)-130 mmtransverse pitch (st)- 85 mm maximum development length (mdl) of approx.239.5 mtrs. long per module along with half round protection shield for top 2 tubes of each bank made out of 2 mm thick plate of ss 304, complete with 6 & 12 mm thick panto support - 3 nos. per set made out of sa 387 gr. 12 cl2, 3 mm thick cassette baffle made out of ss 304 at both ends and for both banks. 3 fabrication, testing and supply of economiser double coils module - mark 02 to 21 & 158 to 177 consist of upper & lower bank double coils module (to be deliver in 2 compartment) made out of cold drawn seamless carbon steel boiler tubes tube size: 44.5 mm od x 5.6 mm thicknessmaterial – carbon steel confirming to sa210 gr. cbanks – 2 (upper and lower bank)longitudinal pitch (sl)-130 mmtransverse pitch (st)- 85 mm maximum development length (mdl) of approx. 478.5 mtrs. long per module along with half round protection shield for top 2 tubes of each bank made out of 2 mm thick plate of ss 304, complete with 6 & 12 mm thick panto support - 3 nos. per set made out of sa 387 gr. 12 cl2, 3 mm thick cassette baffle made out of ss 304 at both ends and for both banks.