USED DOYLE & ROTH 310 SQUARE FOOT HASTELLOY HEAT EXCHANGER. HASTELLY C276 TUBES, TUBE SHEETS, AND BONNETS. 9316) 3/4" DIAMETER X 5' LONG TUBES RATED 100 PSI/FULL VACUUM @ 350°F. CARBON STEEL SHELL RATED 50 PSI/FULL VACUUM @ 350°F. 6", 3", AND 2" TUBES INLET/OUTLETS AND 3" SHELL INLET/OUTLETS. NEW 2002.