Unused 850 sq. ft. Carbon steel horizontal heat exchanger. 7.1 x 1.1 Design duty (MMBTU/Hr). Mfg. by Wuxi Chemical Equipment (China). Shell Design Rating: 550/FV psig @ 475 deg. F. Tube Design Rating: 425/FV psig @ 650 deg. F. Shell mawp 602.9/FV psig @ 475 deg. F. Tube mawp 549.5/FV psig @ 650 deg. F. 23" X 156". Serial #WHA22-020-1. National Board #511. BFW Preheater. Under Nitrogen Purge