tender for procurement of rectangular with circular corner metallic expansion joint with liner plate (covering plate) for hot primary air duct to coal mill and flue gas duct for bhel make boiler of unit no. 10 & 11, stps, sarni. , procurement of rectangular with circular corner metallic expansion joint with liner plate (covering plate) for hot primary air duct to coal mill and flue gas duct for bhel make boiler. , flue gas duct rectangular with circular corner metallic expansion joint, size-3114mm x 5014mm x 272mm, (fs) stl2 with liner plate. no. of fold: 2 nos. for flue gas duct size-3114mm x 5014mm, .material:- cortan steel a588 gr.-a, medium of flow = flue gas, material code :- 91604736914-01, , rc exp.jt.(fs)stl4 liner plate 5054 x 3154 x 514mm, (fs) stl4 with liner plate. no. of fold: 4 nos. material - as per drawing. working temperature - above 150°c. material:- cortan steel a588 gr.-a, medium of flow = flue gas, material code :- 91604736914-01 , rectangular with circular corner expansion joint for hot primary air duct with liner plate size-3450x2810x186mm, no of fold: 1 nos. material: cortan steel a588 gr. a working temperature- above 300°c medium of flow- hot primary air , hot primary air duct rectangular with circular corner metallic expansion joint size-1260x2010 style 04 (hs)(recj) corten steel including liner and plate flange