dismentling , fabrication and erection of boilers tubes as per our drawings from reputed contactors dismentling , fabrication and erection of boilers tubes as per our drawings from reputed contactors , boiler retubing , dismantling, fabrication and erection of 70 mm odx 4.06 mm thickx 8 meter long header to header side wall tube of 20 ton capacity boiler no. 01 and 02 wil make alongwith hydraulic testing at 36 kg per cm² and satisfactory trial to be given. , dismantling, fabrication and erection of 44.45 mm od x 4.06 mm thick superheater coil including s.s. supports as per drawing / sample of 20 ton capaity boiler no. 1 wil make alongwith hydraulic testing at 36 kg per cm² and satisfactory trial to be given. , fabrication of fintype economiser tube size 101.6 mm odx 4.06 mm thick of 20 ton capacity boiler no. 1 & 2 wil make.m.s. fins will be supply by the contractor according to economiser tubes drawing / sample. , dismantling, fabrication and erection of 70 mm odx 4.06 mm thick drum to drum screen tube as per our dawing / sample of20 ton capacity boiler no.02 wil makealongwith hydraulic testing at 36 kg per cm² and satisfactory trial to be given. , dismantling, fabrication and erection of 63.5 mm od x 2.34 mm thick x 5.1 meter long air heater tube including expending of both end of tubes of 30 ton capacity boiler no.3 bacauwolf make. leakproof and satisfactory trial to be given. , modification work in bottom side header of 20 ton capacity wil make boiler for cleaning purpos. the work includes dismantling of old flange with header and fabrication of 217 mm odx schedule 80 header piece ( 500 mm to 1 meter ) and welding of new flange ( cl 600 ) with blind. hydraulic testing at desider pressureand satisfactory trial to be given.