Unused 5700 Sq Ft SS U-Tube Shell & Tube Heat Exchanger Mfg Joseph Oat Corporation. 8 Pass. Carbon steel shell rated 150 psi at 200 degrees F. (1194) 3/4" Diameter x 11' long 304L stainless steel tubes rated 150 psi at 200 degrees F. 304L Stainless steel head and tubesheets. Openings for shell (2) 14", for tubes (2) 10". Mounted on saddles. Serial #2692B, National Board #3607. Built 2012.