Unused 327 sq. ft. 316L Stainless steel horizontal heat exchanger. 1.13 Design duty (MMBTU/Hr). Mfg. by Southern Heat Exchanger. CS Shell: 150FV psi @ 375 deg. F. 316L Stainless steel Tubes: 161 psi @ 375 deg. F. 20" X 180". Serial # 22-0250. National Board #16150. Built 2023. Aerobic Reactor Heat Exchanger. Under Nitrogen Purge