Used 191 Sq Ft Doyle and Roth 304 Stainless Steel Horizontal Shell and Tube Heat Exchanger. (94) .75"OD x 10' L 304 SS Tubes rated 478 PSI/FV @ 500F. Carbon Steel Shell rated 478PSI/FV @ 350F. Approximately 29" OAH x 163" OAL. Weight 1,887 lbs. Serial #S2766-5. National Board #21576. Built 2015. Last Use Syngas preheater.