Electric heating – Metal heating – Of cylinders
Patent
1982-09-07
1984-06-12
Reynolds, B. A.
Electric heating
Metal heating
Of cylinders
219 60R, B23K 900, B23K 3106
Patent
active
044544057
ABSTRACT:
In a welding procedure for joining of adjacent, possibly partially enclosed metal components, such as pipe sections, wherein the welding procedure can be of a gas tungsten arc type such as a heli-arc type, or similar process, and wherein oxidation of metal frequently occurs within the components at the joinder point due to presence of oxygen in the region of weld during the welding procedure; introducing under pressure and at least initially pressure blowing, at a relatively high pressure, an inert gas into the interior of the components in a substantial swirling and interior surface wiping motion. The inert gas is blown through the components, from the entry end, beyond the weld region to rapidly, and substantially completely remove from the interior and weld region, any oxygen or other possible deleterious gas or material. Subsequently a lower pressure introduction of gas will serve to maintain the interior free of oxygen and the like. This procedure permits a clean, rapid welding of the elements in the absence of a build-up of undesired metal at the weld or juncture point, or undesired disturbance of the weld puddle which could cause defects in the weld.
REFERENCES:
patent: 2716691 (1955-08-01), Bowman
patent: 3495066 (1970-02-01), Broyard et al.
patent: 3614378 (1971-10-01), Goodell
patent: 4395614 (1983-07-01), Weil et al.
Reynolds B. A.
Sigda Catherine M.
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