Experience the Stainless Steel Pipe Welding

Metal pipe welding is gravy work. Always has been. Always is going to be.

If you're able to take action and do it well, you are the man and you will probably never starve yourself. However it takes some attention to detail to acheive it right.

The most important thing that separates the boys from your boys or should I say, the genuine welders through the rod burners may be the willingness to follow along with procedures for welding stainless-steel. Procedures like expecting the pipe to chill involving passes, keeping the hot tip in the rod shielded with argon, snipping the tip with the tig welding rod when it gets crapped up, keeping your tungsten sharp.

One of many procedures Come on, man is PURGE. Stainless-steel absolutely must be purged with argon gas to avoid sugaring. Sugaring is additionally called granulation yet it's severe oxidation no matter what you refer to it as.

You cannot even get away with tack welding with no argon purge that shield the trunk side or inside of the pipe. How do you do it? How do you protect a corner side with argon?



Usually it is done with aluminum duct tape. The ends of the stainless-steel pipe are taped shut and the whole inside is purged with argon gas. Even the opening in the pipe joint itself is taped to ensure argon can fill the entire pipe and push out any oxygen. The tape is peeled back just enough to get a tack after the pipe is purge enough.

What exactly is enough? The only method to tell for sure has been an oxygen analyzer. A bic lighter won't do the trick. Even 2% oxygen content will fly out a bic lighter. And 2% oxygen can result in a black root pass.

There are many other serious approaches to look at the purge but an oxygen analyzer may be the sure way.

Here are a few tips that may help you get a full purge around the stainless-steel pipe you weld.

Make sure there's no water in the pipe...not a drop. A single drop of water will throw a monkey wrench with your purging until it evaporates. Remember what is in water? Hydrogen and oxygen.
Poke a vent hole inside the uppermost place you can find. Think of argon as though it absolutely was water. Because it is heavier than air, it will refill any space like water, displacing the environment since it fills every nook and cranny.
More purge gas flow may not be better. A top and turbulent flow of argon is not going to necessarily purge a pipe quicker than a lower flow rate. Along with a diffuser on the end with the end of one's argon hose usually permits you to utilize a higher flow rate. A homemade diffuser can be achieved with some stainless wool , some perforated stainless sheet, plus a bit of sheet metal.
When you verify a good purge, you are ready to tack. Peel the tape back just enough to tack and let cool a little and re tape. Then tack again 180 degrees apart. Continue until all tacks are in place.

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