Welding gas purging apparatus and method

Details Welding gas purging apparatus and method Welding gas purging apparatus and method

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.

REFERENCES:
patent: 2802092 (1957-08-01), Hauck
patent: 2819517 (1958-01-01), Pursell
patent: 4405075 (1983-09-01), Roddy
patent: 4916281 (1990-04-01), Flasche et al.
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.

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