Unused Koch 358 sq. ft. Separated Closure Hairpin Heat Exchanger. Model 12144-MTB-ABC. Carbon steel shell and tube 12? diameter X 144? long tube length. Shell rated 695/FV @ 400F. Tube side 75/FV @400F. Designed for shell side split flow with each leg in parallel. Cast removable housing cover on hairpin. Designed U-tube with floating head. Serial #10662-08-1-01. Built 2008.