How to achieve argon shielding for TIG welding at the fixed joints of oxygen pipelines
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Regarding high-oxygen gas pipelines, argon shielded welding is generally required. For pre-welded joints, argon protection can usually be ensured effectively. But for large-diameter fixed joints assembled at great heights, how do people ensure argon protection during the construction process?
The inside of the pipe is filled with water-soluble paper, and then argon is pumped in；
Try to leave the last seam near the flange. . .
In addition to filling the back with argon gas, a protective coating is applied around the root groove.
Is there any way to flush out argon?
You are the last barrier left; you need to seal both ends, and then push argon gas in. That’s it. It’s just a little waste at most. . .
The suggestions from above are great; they can be used as a reference. I’ve also learned* from them