Used 100 Sq Ft Doyle and Roth Carbon Steel Horizontal Shell and Tube Heat Exchanger. (64) .75"D x 8' tubes rated 200 psi/FV @ 200F. Shell Rated 230 PSI/FV @ 230F. Approximately 29" OAH x 136" OAL. . Weight 1,496 lbs. Serial #S2766-3. National Board #21574. Built 2015. Last use Syngas Preheater