Used 1800 Sq Ft Shell & Tube Heat Exchanger. CS shell,316 SS tubes & head. Shell is rated for 300 psig @ 700 F, and the tubes are rated for 600 psig @ 650 F. Tube diameter is 1", tube length is 20'0"; 344 tube holes; 1.25" tube pitch; 14 BWG tube wall. Shell has 1 pass, the tubes have 8 passes. (2) 10" shell nozzles; (2) 6" tube nozzles; 27 baffles; baffle spacing is 7 5/8". Shell diameter is 2'0"; overall length is 24'7". National Board No. is 2804. Built in 1989.