Used - Yula 2 Pass Shell & Tube Heat Exchanger, 302 Square Feet, Model WC-2H-144BS, 304L Stainless Steel, Horizontal. 304L Stainless steel shell rated 75 psi at 40 to 250 degrees F. (130) 3/4" diameter x 144" long 304L stainless steel tubes rated 110 psi at 40 to 250 degrees F. 304L Stainless steel tubesheet, carbon steel heads. Openings for tubes (2) 4", openings for shell 10", 2". National Board# 12657, serial# 20275, built 2007.