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

If you’re able to do it and get it done well, you’re man and you’ll never starve yourself. Nevertheless it takes some awareness of detail to acheive it right.

The most important thing that separates the lads from the boys or must i say, the true welders from your rod burners is the willingness to check out procedures for welding metal. Procedures like awaiting the pipe to chill involving passes, keeping the hot tip of the rod shielded with argon, snipping the end with the tig welding rod if it gets crapped up, keeping your tungsten sharp.

One of the main procedures Come on, man is PURGE. Stainless-steel absolutely must be purged with argon gas in order to avoid sugaring. Sugaring is additionally called granulation yet it’s severe oxidation it doesn’t matter what you think of it as.

You cant even pull off tack welding with no argon purge that shield the rear side or inside of the pipe. Exactly how do you take action? How can you protect a corner affiliate with argon?

Usually it is finished with aluminum duct tape. The ends of an metal pipe are taped shut and the whole inside is purged with argon gas. The opening within the pipe joint itself is taped in order that argon can fill the entire pipe and push out any oxygen. The tape is peeled back ample to secure a tack after the pipe is purge enough.

Precisely what is enough? The only method to tell for sure is with an oxygen analyzer. A bic lighter will not do the trick. Even 2% oxygen content will blow out a bic lighter. And 2% oxygen will lead to a black root pass.

There are several other smart solutions to check the purge but an oxygen analyzer may be the sure way.

Here are a few tips that will help get a good purge for the stainless pipe you weld.

Ensure there isn’t any water in the pipe…even if it’s just a drop. One drop water will throw a monkey wrench within your purging until it evaporates. Remember what exactly is in water? Hydrogen and oxygen.

Poke a vent hole from the uppermost placed you will find. Imagine argon as if it was water. Because it is heavier than air, it’s going to fill any space like water, displacing the environment because it fills every nook and cranny.

More purge gas flow is not always better. A high and turbulent flow of argon is not going to necessarily purge a pipe quicker than a lower flow rate. Plus a diffuser on the end in the end of your argon hose usually lets you use a higher flow rate. A homemade diffuser can be created with many stainless steel wool , some perforated stainless sheet, plus a amount of sheet metal.

After you verify a good purge, you are prepared to tack. Peel the tape back ample to tack and let cool a bit and re tape. Then tack again 180 degrees apart. Continue until all tacks have established yourself.

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