Shell and Tube Heat Exchanger Skid. Primary Shell and Tube Heat Exchanger. Tube material: 316 stainless steel. Number of passes: 1. Number of tubes: 87. Tube dimensions: 3/4 in. dia. x 6 ft. L. Heat transfer surface area: approx. 102.4 sq. ft. Inlets: (1) 8 in. dia. ANSI 150lb. flanged port (product), (1) 4 in. dia. ANSI 150lb. flanged port (media). Outlets: (1) 2 in. dia. condensate port, (1) 4 in. dia. ANSI 150lb. flanged port (media), (1) 8 in. dia. ANSI 150lb. flanged port (product). Secondary Shell and Tube Heat Exchanger. Tube material: 316 stainless steel. Number of passes: 1. Number of tubes: 87. Tube dimensions: 3/4 in. dia. x 8 ft. L. Heat transfer surface area: approx. 136.6 sq. ft. Inlets: (1) 8 in. dia. ANSI 150lb. flanged port (product), (1) 8 in. dia. ANSI 150lb. flanged port (media). Outlets: (2) 2 in. dia. ACME fittings (product), (1) 8 in. dia. ANSI 150lb. flanged port (media). Overall dimensions: 9 ft. 9 in. L x 5 ft. 1 in. W x 3 ft. 11 in. H.