Used 1600 Sq. Ft. BASCO 304 Stainless Steel Shell & Tube Horizontal Heat Exchanger. Rated 75 PSI/FV @ 300 F on shell; rated 75 PSI @ 300 F on tube. BEM Type; 2 pass. (842) 3/4" x 10' lgth 304SS tubes. Stainless steel shell and tubes. Carbon steel heads. Shell side: (2) 6" (1) 16". Tube side (2) 4". Removable tube bundle. Serial #950451-0201, Model # 33120, National Board # 14902.