Used 483 Sq Ft Industrial Alloy Fabric 316 SS Horizontal Two-Pass Shell & Tube Heat Exchanger. Rated 140 psi @ 300 deg F on shell, rated 140 Psi @ 200 deg F tube side. 16" Diameter x 308" Overall Length. (88) Tubes are approx. 1 1/4" ID, 1 3/8" OD. Serial # D1858, National Board #1584, Year Built 1993.