Heat sink welding and purging apparatus
AssigneeSloan Purge Products Co., Inc.
InventorsMarlo S. Sloan, Arthur B. Renfro, Jr.
Life of this patent
Estimating the term…
Abstract
A heat sink welding and purging apparatus for use in the welding of pipe joints for piping to be used with nuclear power systems and the like wherein the weld area must be kept below a temperature at which the dangers of carbide precipitation occur. The various embodiments include expandable heat sink and sealing bladders which are expanded in use to respectively seal the adjacent interiors of the ends of the two pipes to be welded at the adjacent joints. After expanding and sealing the pipe openings, coolant is fed into the interior of the apparatus to cool the joint being welded. Also purging gases may be used to eliminate undesirable atmospheric gases adjacent the weld joint.
Claims22
Apparatus for heat sinking and purging pipes to be welded for use in nuclear systems and the like, comprising:
- first means for sealing internally the adjacent ends of two abutting pipes to be welded;
- and, second means for directing a coolant into the first means for cooling said sealed abutting pipe ends in order to effect a heat sink function in order to keep the temperature of the weld area below that where the dangers of carbide precipitation occur.
A purging and cooling apparatus for use with the welding of cylindrical members, comprising:
- inflatable means for expandable engagement with the cylindrical members to be welded adjacent the weld joint, and means for adding inflation and coolant medium to the inflatable means for inflating the inflatable means and cooling the area near the weld joint, the inflation and coolant medium being the same fluid material.
Dependencies are inferred from the claim text.