tender for supply of new calendria of quad 3rd body 440 m2 h.s. with bottom cone central down take for year 2024-25 supply of new calendria of quad 3rd body 440 m2 h.s. with bottom cone central down take for year 2024-25 , particulars , supply of new calendria of quad 3rd body 440 m2 h.s. with bottom cone & central down takefor year 2024-25 specification:-heating surface - 440 m2 dja of tube plate - 2930 mm no. of tubes - 1680 size of tube - 42x45x2010 mm ligament - 13 mm shell thickness - 16 mm pitch of tubes - 58 mm dia of vapour entry - 650 mm dia of down take - 440 mm no of tie rods - 7 nos tube plate thickness - 32 mm size of condensate box - 210x 80 mm with proper ammonia header & water connection.