Used 1702 Sq. Ft. horizontal steel Shell & Tube Heat Exchanger. CS Shell rated 75 PSI/FV @ 450° F, 304L-SS Tubes rated 75 PSI/FV @ 450° F. (556) tubes 1†OD X 12’. Shell Dia: 34†AOL: 17’ 5â€, Shell: 1 Pass; Tubes: 1 Pass. Fittings: Shell: 6†inlet, 2†outlet, 1†drain; Tubes: 8†inlet, 14†outlet, 1-1/2†drain. Mfr: Worsham Enterprises, Model 33-144, NB stamped. Type: AEL. (Drwg on File)