tender for supply, erection & commissioning of 250nb seamless pipes & fittings in unit i esp ring header.; 1 supply, erection & commissioning of 250nb seamless pipes & fittings in unit i esp ring header. (erection as per the instruction of site engineer) (1 set consists of following) 2 supply portion 3 250 nb (273.10 mm od) seam less pipes of wall thickness-12.7mmmaterial: astm a 106, grade b, sch 60 4 250 nb m.s. flanges, thick -20 mm, no of holes - 12 nos, hole dia -22 mm. pcd – 362 mm 5 250 nb seamless bend 90 degrees, is-1239, sch 40, thick :9.3 mm material: mild steel 6 100nb ms seamless pipe (114.3mm od) of wall thickness-6.02mm , sch-40 7 100nb ms flange, id 116mm, thick-20mm, no. of holes- 2, hole dia- 18mm, pcd- 180mm. 8 erection portion:dismantling, fabrication & erection of esp 250nb seamless pipes & fittings in unit i esp ring header with rubber lining of 200 sq.mtrs as per is 4682 (part 1):1994 (erection as per the instruction of site engineer)(1 set erection portion consists of dismantling, fabrication & erection of 250nb seamless pipe-148mtrs, 250nb ms flange-58 nos, 250nb seamless bend - 4 nos, 100nb ms seamless pipe-3 mtrs, 100nb ms flanges-12 nos including rubber lining of 200 sq.mtrs as per is 4682 (part 1):1994)note: other details if required sample available at site may be inspected before quoting and manufacturing