Used Approx 3,851 Sq Ft Carbon steel vertical shell and tube heat exchanger. CS shell rated 316 PSI @ 470 deg F. CS Tubes rated 75 PSI @ 900 deg F. Shell: 38" OD x 20' L, (739) tubes, 1" OD x 239"L. 300#, Flange Nozzles: (1) 10", (1) 6", (1) 3", (2) 2", (1) 1". 1 Pass Shell, 1 Pass Tubes. Built 1992 - Atlas Industrial Manufacturing Co. National Board # 6896, Serial # 8233. Re-Built in 1998 by Exell, Inc., S/N: 13345, NB # 1865. Unit has expansion joint. Weight - Approx. 19,750 #.