φ600 thin-walled stainless steel air duct, using single-sided welding; the medium inside is heated air
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It is a φ600 thin-walled stainless steel tube through which heated air flows. Single-sided welding is being used; is it necessary to grind the welds inside the tube? Single-sided TIG welding is performed from the outside of the tube, and there are many weld beads on the inner wall of the tube. I’m concerned that over time these weld beads might fall off and, along with the heated air, enter the product, introducing impurities into it. Is such a possibility exists?
With a skilled welder, there should be no problem – just weld directly!
TIG welding generally yields good shape; if there are weld beads, back sealing can be considered.
It depends on your welding equipment. We use plasma welding, with argon gas used for protection on the back side; the welds inside are continuous and very uniform after welding, without any weld bumps. So, the issue is viewed as follows: 1. Backside argon protection must be used. Improve the welding process to ensure internal welding quality ； 2. If the backside quality cannot be met, polishing can be attempted. If nothing else works, pull it inside once. Solder the outside again.