Title: Heat sink welding and purging apparatus

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.

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Inventors: Sloan, Marlo S. (Bakersfield, CA, US)
Renfro, Jr., Arthur B. (Bakersfield, CA, US)

Application Number: 708224
Filing Date: 1976-07-23
Publication_date: 1978-07-18
Assignee: Sloan Purge Products Co., Inc. (Bakersfield, CA)
Primary Class(es): 228/222 219/136, 228/46, 228/219
Other Classes:
US Patent Ref:

2254314	Sep, 1941	Reed	228/46.
3597833	Aug, 1971	Frederick et al.	228/219.

Other Refs: 1,404,467

Aug, 1975	GB

Primary Examiner: Watson, Robert C.
Assistant Examiner:
Attorney: O'Brien; Clarence A., Jacobson; Harvey B.