Used 1113 Sq Ft Southern Heat Exchanger Horizontal Shell & Tube Heat Exchanger. 316L Stainless steel shell rated 150 psi at 300 degrees F. (284) 3/4” diameter x 20’ long 316L stainless steel tubes rated 150 psi at 300 degrees F. Carbon steel ends lined with 316L stainless steel, 316L tube sheets. Openings for tubes (2) 6”, shell (2) 10”. Mounted on saddles. Serial #89-345. National Board #5825. Year 1990.