Used 187 Sq Ft Doyle and Roth 304 Stainless Steel Horizontal Shell and Tube Heat Exchanger. Tubes 304 stainless steel. (94) .75"OD x 10' L Tubes rated 478 PSI @ 500 F, FV @ 350 F. Carbon Steel Shell rated 478PSI/FV @ 500F. Approximately 29" OAH x 163" OAL. Weight 1,887 lbs. Serial #S2766-4. National Board #21575. Built 2015. Last Use Syngas preheater.