Arc Machines, Inc.
Welding of "Pulled Tee" Type Joints
The automatic orbital welding of "pulled tee" type joints can be accomplished using the Arc Machines' weld heads listed here. A tube stub, sanitary ferrule or other similar fitting may be welded to the "pull". When the tube or fitting is relatively short, our Fitting Support Mandrel is used to extend the grip area, and provide support for the weld head.
Each of the weld heads listed will accommodate a range of tube or fitting sizes. Tooling for this application includes an adjustable-angle or extended electrode holder, a cylindrical gas seal, sized to fit the "run" diameter, and a clamp insert sized to fit the "branch" tube or Fitting Support Mandrel (FSM).
The chart below can be used as a guide to the required stick-out and branch spacing dimensions.
The top two drawings depict a weld head set-up to weld a tube stub or a fitting to the "pull". The bottom drawing depicts branch spacing requirements for manifold applications. Use the chart below as a guide to the required stick-out and branch spacing dimensions.
NOTE: The "branch" tube or fitting must be tack-welded to the "pull" before installing the weld head.
