18 Sq. Ft. Monticello Tank Company Titanium Shell & Tube Heat Exchanger, Type BEM. Carbon steel shell. Shell side: 75 PSIFV @ 400 degree ; Tube side: 75 PSI/FV @ 400 degree tube side. (7) Tubes, 1" OD. 4.5" Dia, 120" OAL. National Board #5530. S/N: T103165-1, Built 1994. Nozzles: (3) 2". No Heads.