USED APPROXIMATELY 595 SQUARE FOOT RAS HASTELLOY C276 HEAT EXCHANGER. (258) 3/4" HASTELLOY TUBES RATED 75 PSI @ 340 deg F. 24" OD X 11'9" LONG 316 STAINLESS STEEL SHELL RATED 50 PSI/FULL VACUUM @ 340 deg F. NOTE: AL6XN HEADS AND TUBE SHEETS. BUILT 2002.