Electric heating – Metal heating – Of cylinders
Patent
1998-09-15
2000-05-23
Ryan, Patrick
Electric heating
Metal heating
Of cylinders
219 60R, 219 591, 219 61, 219 60A, 219 50, 2191251, 21912511, 228 29, B23K 902
Patent
active
060668237
ABSTRACT:
The present invention relates generally to an apparatus and method for performing tube-to-tubesheet welding within box headers and, in more particular, to a GTAW welding gun that has a long generally tubular barrel which is small enough in diameter to pass through the plug holes on one side of a box header and long enough to reach over to the point of connection on the opposite tubesheet. Additionally, and as a critical part of the instant invention, the torch is fitted with a semi-automatic cold wire feeding apparatus and an associated wire feed liner that is constrained to be proximate to the exterior of that tube throughout said barrel's length. Thus, both the barrel of the welding torch and its accompanying wire feed liner are sized to fit within and pass through a plug hole.
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Minnick, Gas Tungsten Arc Welding Handbook. The Goodheart-Willcox Company, Inc., South Holland, IL, 1996, pp. 5-11; 39-70.
Weisman, Editor, Welding Handbook, Fundamentals of Welding. Seventh Edition, vol. 1. American Welding Society, Miami, FL, 1976, pp. 2-32.
Elve M. Alexandra
Ryan Patrick
LandOfFree
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