Metal fusion bonding – Process – With condition responsive – program – or timing control
Patent
1994-08-22
1995-06-20
Heinrich, Samuel M.
Metal fusion bonding
Process
With condition responsive, program, or timing control
228219, 228 8, 228 42, 219 74, B23K 916
Patent
active
054254922
ABSTRACT:
An apparatus and method for purging reactive gases from the vicinity of a molten weld during the welding process, having particular application to the welding of industrial process piping systems and pipelines, especially stainless steel and other alloy pipelines. A system is disclosed for boosting purging speed and efficiency by providing a multidirectional flow of purging gas adjacent to the interior walls of the pipe sections being joined. The rate of purge gas flow is automatically adjusted in response to changing gas pressures in the vicinity of the progressing weld.
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patent: 5304776 (1994-04-01), Buerkel et al.
"Damming Process Pipework for Gas Purging", Process Engineering, p. 57 (Aug. 1989).
Stone, Philip L., "Nacuum Purging--An Alternative Method," Metal Construction (Sep. 1986) pp. 553-555.
Henon, B. K., et al., "Constructing A Class 1 UHP Stainless-Steel Process-Gas Piping System: Part II" Abstract.
Baker Rod D.
Heinrich Samuel M.
Peacock Deborah A.
Thode Edward F.
Thode Isobel
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