Used 720 Sq ft Hastelloy C horizontal Shell and Tube heat exchanger. Manufactured by Atlas Industrial Manufacturing Co. 10'4"OAL x 2'6"D. 316L Stainless Steel Shell and 316L/Hastelloy C heads rated 450PSI/FV@608F. (524) .75"OD Hastelloy C tubes rated 75PSI/FV@608F. Expansion joint. National Board #9035. Serial #10637. Built 2000.