Used 96 Sq Ft High Alloy, Shell & Tube Heat exchanger. Carbon Steel Shell rated 150 PSI/FV @ 350 deg F. (83) 3/4" dia. Tantalum tubes rated 150 PSI/FV @ 350 deg F. Hastelloy Heads. Shell dia: 12" x 109" OAL. Nozzles; Shell - (2) 3.5"; Tubes (2) 6", 3". Mfg by Cosmos Minerals, 1992, S/N: 13195-4, NB# 261. Hastelloy Heads built 2002, NB# 297.