Used 6228 Sq Ft. U-Tube Heat Exchanger. Mfg by Hughs Anderson Eng. Corp 1981. Carbon steel Shell (SA-516) rated 150 PSI @ 500 deg F; Carbon Steel Tubes (SA-214) rated 150 PSI @ 500 deg F. Carbon Steel Heads (SA-516). Shell - 4'dia. x 23'2"L ; (750) Tubes - 3/4" dia. Flanged Nozzles: (1) 12", (3) 6". Type AEU. S/N: 3752, NB# 1159. Weight: 37,600 lbs.