Abstract: A reboiler for dehydrating glycol used in a gas dehydration system having improved thermal efficiency including a horizontal boiler vessel, a horizontal heater within the boiler vessel having a fuel burner therein, a heat exchange vessel extending downwardly from the boiler vessel including piping to receive heated glycol therein from the interior of the boiler vessel and a heat exchange conduit within the heat exchange vessel extending exteriorly of it, one end of the heat exchange conduit communicating with the interior of the boiler vessel to transfer wet glycol into the boiler vessel and a glycol inlet at one end of the conduit extending externally of the vessel and the heat exchange vessel having a dehydrated glycol outlet, hot dehydrated glycol from the boiler vessel passing downwardly through the heat exchange vessel to thoroughly exchange heat with the incoming wet glycol to thereby conserve heat applied to the glycol for dehydration.

Abstract: A system for automated manufacture of a pressure vessel, the system including a cutting station at which an elongated cylinder is cut into a selected length forming the vessel shell, a first, second and third computer control shell indexing station, each indexing station having means to rotate the shell about its horizontal axis in response to computer control, a computer control multi-axes arm robot having means to grasp and manipulate a cutting torch and a welding torch, the robot moving to the first index station to cut holes in the shell at preselected locations and, at the second indexing station for welding piping fittings in the shell having holes cut therein, and at the third indexing station for welding a head on each end of the shell to close the vessel. In the preferred arrangement the robot is mounted on a track which runs parallel to the first, second and third indexing stations.