Used 11 Sq Ft Doyle and Roth Carbon Steel Shell and Tube Heat Exchanger. (8) .75"OS x 84"L tubes rated 120PSI/FV@160F. Shell rated 100PSI/FV @ 140F. Approximately 23" OAH x 108" OAL. Weight 465 lbs. Serial #S2774. National Board #21568. Built 2015. Used as Naptha Cooler.