UNUSED approx. 50 Square Ft Heat Exchanger. CS Shell rated 225 PSI @ 450 deg F. 316-SS Tubes rated 150 PSI @ 450 dceg F. 6" OD Shell. (116) Tubes, .375" dia x 53" L. Nozzles - Shell: (2) 2"; Tubes (2) 3". Built by ITT 2010, S/N: 141637-02, NB# 204035. U-1 on file.