supply of new calendria 560m2 heating surface season 2022-23 supply of new calendria 560m2 heating surface season 2022-23 , supply of quad calendria central down take heaving heating serface 560 sq. mtr. and other spacitifaction are as under , heating surface - 560 sq.mtr. , dia of calendria ( in side ) -3200 mm , calendria shell thickness - 12 mm , no. of tubes - 2150 , length of tube - 2015 mm , id x od of tube- 42 x 45 mm , tube plate thickness - 32 mm , pitch - 59 mm , ligament - 14 mm , tube platejointless , top and bottom tube plate - upper and bottom site plate - 150 mm more , down take - central down take , dia of vapour entry - 600 mm , condenset withdrawal -02 nos.