tender for supply of juice heater header with tube plates. , supply of juice heater header with both tube plates and both covers (m.s. cover should 32 mm thick after machining with proper stiffeners and suitable eye bolts & holding ribs) for vertical tubular juice heater of 240 m2 heating surface (without tubes) shall be multiple circulation type design to have juice velocity between 1.8 m/sec. to 2.0 m/sec. at 140 m3 juice/hr. the tube plate should be drilled properly reamer finished to fit 45mm od x 1.2 mm thick x 4150 mm long s.s. tubes having following specifications: a) no of compartments - 15 top, 14 in bottom b) no. of passes - 28 c) no. of tubes/pass - 15 d) total no. of tubes - 420 e) tube plate thickness - 25 mm f) ligament of tube - 12 mm should not less than g) thickness of partition plates - 12 mm h) thickness of shell/extended - 12 mm x dia.1710 shell plate and diameter on the top of compartment plates, 1 square bar with suitable groove as per existing to be welded for proper fitting of the rubber strip. the top header should be provided with common housing for fixing two. nos. 8 double beat valves to operate juice heater on raw juice as well as on sulphited juice heating. shell of the headers should extend atleast 6 beyond the tube plates towards the calandria. the headers should be exactly as per our existing size and design.