tender for supply of quad calendria for season 2025-26 - quad calandria- h.s.(440m²) dia of tube plate-3000 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 700 mm diasteam entry – 650 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. 3 quadcalandria- h.s.(560m²) dia of tube plate-3350 mm( internal)tube plate thickness -32 mmtube size- od 45 x id 42 x1885 mm lengthnos. of tubes - 2235ligament 16 mm calandria shell thickness – 12 mmcalandria shell above top tube plate- 50 mm calandria shell below bottom tube plate- 150 mmcentral down take 800 mm diasteam entry – 700 mm with suitable jackettierod – 25 mm ( 06 nos)condensate out let – 02 nos.( 125 mm)suitable ammonia connection ( ss 304) out side effective heavy & light noxious gases proper withdrawal with ss pipesuitable 04 nos stools.