Used 320 Sq Ft Stainless Steel Horizontal Shell and Tube Heat Exchanger. Manufactured by Perry Products. Carbon Steel shell rated 90 psi @ 390°F. 316 Stainless Steel tubes rated 90 psi @ 390°F. (196) 0.75" dia 316SS tubes with a 15/16" triangular pitch and 0.049" wall thickness, 8'2" long, 4 passes. Shell diameter: 1'6". National Board coded.