Used 163 sq. ft. vertical Hastelloy C heat exchanger. MFD by Atlas, built 2000. CS Shell Side: 100PSI/FV @ 350 deg F.; Hastelloy C Tube side: 100 PSI/FV @ 350 deg F. Hastelloy C Heads. Shell - 10" dia x 13' 4" OAL. (85) Tube x .75" OD. 1 Pass Shell Side, 1 pass Tube Side. Type BEM. Shell nozzles: (2) 3"; Tube Nozzles: (2) 6". S/N: 10446, NB# 8931.