Abstract: A heat exchange vessel has a plurality of tubes disposed therein. A tube sheet section in the vessel has a plurality of ports formed therein for receiving one end of each of said tubes, and at least one channel is formed in said first tube sheet section for communicating with said ports. An additional tube sheet section disposed in said vessel has a plurality of ports formed therein for receiving the other ends of said tubes and at least one channel formed in said additional tube sheet section is provided for communicating with said latter ports. Means is provided for introducing a heat exchange fluid to the channel associated with one of said tube sheet sections for passing through its respective ports through said tubes. Likewise means is provided for collecting the fluid from the channel associated with the other tube sheet section for passing the fluid externally of the vessel.

Abstract: A heat exchange vessel has a plurality of tubes disposed therein. A tube sheet section in the vessel has a plurality of ports formed therein for receiving one end of each of said tubes, and at least one channel is formed in said first tube sheet section for communicating with said ports. An additional tube sheet section disposed in said vessel has a plurality of ports formed therein for receiving the other ends of said tubes and at least one channel formed in said additional tube sheet section is provided for communicating with said latter ports. Means is provided for introducing a heat exchange fluid to the channel associated with one of said tube sheet sections for passing through its respective ports through said tubes. Likewise means is provided for collecting the fluid from the channel associated with the other tube sheet section for passing the fluid externally of the vessel.