Get current pricing for Carborundum, 968 Sq Ft Graphite C 968 Sq Ft Graphite Carborundum Vertical Shell & Tube Heat Exchanger. Shell Rated 75 Psi At 340. Tubes Rated 50 Psi At 340. Tube Diameter 1.25. Tube L . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: