tender for boiler tube erection and fabrication , 30 tph boiler no 3 tubes replacement work , dismentaling of old tubes from drums / heeders cleaning of seat & groove at drum and nipples at headers , fabrication of new tubes as per drg / sample . erection & fitting of fabrication tubes as per irb standard , expending of both ends of tubes supto development ofwell mouth and finally leak proof hydraulic testing sof boiler at 36 . 5 kg / cm pressure boiler regalation , expending of tues of tubes at both ends upto develapment of well mouthand finally hyduaulic testing of boiler at 36 . 5 kg / cm pressure , do- 76 . 20 mm od 4 . 06 mm thick side wall header to header tubes ( both side- ( 12+12=24 nos . , 20 tph texmaco make boiler no 2 tubes replacement work , dismentaling of old tubes from drums / heeders cleaning of seat & groove at drum and nipples at headers , fabrication of new tubes as per drg / sample . erection & fitting of fabricated tubes as per irb standard , expending of both ends of tubes upto development of well mouth and finally leak proof hydraulic testing of boiler at 36 . 5 kg / cm pressure 76 . 20 mm od x 4 . 06 mm thick side wall header to steam drum front header tubes ( 10+10 = 20 nos ) , do- 76 . 20 mm od 4 . 06 mm thick lower drum to front header riser tubes 06 nos , 20 tph texmaco make boiler no 1 tubes replacement work , dismentaling of old tubes from drums / heeders cleaning of seat & groove at drum and nipples at headers , fabrication of new tubes as per drg / sample . erection & fitting of fabricated tubes as per irb standard , expending of both ends of tubes upto development of well mouth and finally leak proof hydraulic testing of boiler at 36 . 5 kg / cm pressure 76 . 20 mm od x 4 . 06 mm thick side wall header to front header tubes ( 10+10 =20 nos ) , do- 76 . 20 mm od 4 . 06 mm thick lower drum to front header riser tubes 6 nos , fabrication of new gilled / fins type economiser , fabrication of new gilled / fins type economiser tubes 101 . 60 mm id x 4 . 06 thick x 5000 mm long with fitting of flanges at both ends as per drg / sample follwing ibr standards 20 nos , dismantling of old / week existing steam line , dismantling of old / week existing stem line from common steam distribution header to de super heating unit and fabrication & erection of new sch ao steam pipe line along with drains etc as [ er irb standards size- 150 mm nb , do 100 mm , do 50 mm , do 20 mm , dismantling of old / weak long bends and fitting & erection of new bends in sch-ao as per ibr standards , size-20 nb bend , size-32 nb bend , size-40 nb bend , size-50 nb bend , size-65 nb bend , size-80 nb bend , size-100 nb bend , size-125 nb bend , size-150 nb bend , size-200 nb bend , dismentling of old / weak seamless nipples from headers and fitting of sch -40 new nipple at different header as per ibr standard , without material 70 mm od , d0 76 . 20 mm od , do with material size 70 mm od nipple , d0 76 . 20 mm od nipple