Unused 5700 Sq. Ft. SS Shell & Tube Heat Exchanger. MfgJoseph Oat Corporation 8 Pass U Tube Horizontal. 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 #2692A, National Board #3606. Built 2012.