Used 4462 Sq Ft CS Shell and Tube Heat Exchanger. Mfg Borsig GmbH. CS (SA336 F22)Shell Rated 1600PSIG @ 650F. (260) CS (SA336 T22)U-tubes 2900 PSIG @ 650/925F. Saddle Mounted. Openings: (1) 18” Inlet, (1) 18” outlet, (1) 12” downcomer, (3) 2”. Serial #12-8094. National Board #850. Built 1999.