competitive e-bidding for supply of calendria for 2nd quad body for season 2023-24-quad 2ndbody calandria- h.s. ( 440m² ) dia of tube plate-3020 mm ( internal ) tube plate thickness -32 mmtube size- od 45 x id 42 x1885 mm lengthnos. of tubes - 1760ligament 13 mm calandria shell thickness – 12 mmcalandria shell above top tube plate- 50 mm calandria shell below bottom tube plate- 150 mmcentral down take 500 mm diasteam entry – 700 mm with suitable jackettierod – 25 mm ( 06 nos ) condensate out let – 01 nos. ( 150 mm ) suitable ammonia connection ( ss 304 ) out side effective heavy & light noxious gases proper withdrawal with ss pipesuitable 04 nos stools.