Get current pricing for Plant Service Constructio, 431 Sq. Ft. Plant Se 431 Sq Ft Ss Horizontal U-tube Shell & Tube Heat Exchanger. 304l-ss Shell Rated 75 Psi @ 125 Deg F. 304l-ss Tubes Rated 75 Psi @ 450 Deg F. 304l- . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: