Used 4473 Sq Ft Stainless Steel Clad Shell and Tube Heat Exchanger. Manufactured by Heat Transfer Equipment. 347 Stainless Steel Shell rated 1210 PSI@810F. (367) 1"OD tubes rated 1450PSI@775F. 2-pass. (17) Baffles. 31'OAL x 3'10"D. National Board #4424. Serial #05-5659-F. Built 2006.