Used 595 sq. ft. RAS Process shell and tube heat exchanger, Hastelloy C276 tubes, AL6XN tubes sheets and bonnets with (258) .75" diameter x 12' long tubes rated 75 PSI @ 340 F, 316L stainless steel shell rated 50 PSI/full vacuum @ 340 F, 24" diameter x 12' long tube bundle, 4 Pass Tubeside. Nozzles: (2)6" tubes inlet/outlet, 10", 4", 3" shell inlet/outlet, serial# 01187601, National Board# 1245, new 2002. (QTY - 3 available)