Used 4677 Sq Ft Horizontal U-Tube SS Heat Exchanger. 304-SS Shell rated 75/FV PSI @ 250 Deg F. 304-SS tubes rated 75 PSI @ 250 deg. F. Shell: 4' OD x 24' (1 Pass). (1576) .75" Tubes x 14' L (2 Pass). 304-SS Heads. Nozzles: Shell - (2) 10", 30": Tubes - (2) 6". Type BEU. Mfg by Ohmstede, 1988, S/N: 28132, NB# 16.