2000 Sq. Ft. Atlas Co. Stainless Steel horizontal heat exchanger. Carbon steel shell rated 60 PSI @ 500 F; 15 PSI/FV @ 500 F tube side. Passes: Shell - 1, Tubes - 1. Retubed in 1981 and unused. Approx. 477 tubes at 16' L x 1" diameter. Shell inlet/outlet is 6". Shell diameter: 2' 6". No Heads.