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Stainless-steel pipe welding is gravy work. Has been. Always will probably be.

When you can do it and get it done well, you are the man and you may never go hungry. Nonetheless it takes some attention to detail to get it done right.

What is important that separates the men from your boys or should I say, the genuine welders from the rod burners could be the willingness to follow procedures for welding stainless. Procedures like expecting the pipe to cool down the involving passes, keeping the hot tip in the rod shielded with argon, snipping the top of the tig welding rod in the event it gets crapped up, keeping the tungsten sharp.

One of the primary procedures What i’m saying is is PURGE. Stainless-steel absolutely needs to be purged with argon gas to avoid sugaring. Sugaring can also be called granulation however it is severe oxidation no matter what you refer to it as.

You cant even get away with tack welding lacking any argon purge that shield a corner side or interior of your pipe. How do you get it done? How would you protect a corner side with argon?

Usually to control your emotions with aluminum duct tape. The ends of your stainless steel pipe are taped shut along with the whole inside is purged with argon gas. Perhaps the opening in the pipe joint is taped in order that argon can fill the complete pipe and push out any oxygen. The tape is peeled back ample to get a tack as soon as the pipe is purge enough.

What’s enough? The best way to tell definitely has been an oxygen analyzer. A bic lighter won’t do the trick. Even 2% oxygen content will blow out a bic lighter. And 2% oxygen can lead to a black root pass.

There are many other serious ways to confirm the purge but an oxygen analyzer is the sure way.

Here are some tips that will help get a good purge around the stainless steel pipe you weld.

Make sure there is no water inside the pipe…even if it’s just a drop. One 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 from the uppermost placed you will find. Consider argon like it absolutely was water. Since it is heavier than air, it will complete any space like water, displacing the environment as it fills every nook and cranny.

More purge gas flow is not always better. A top and turbulent flow of argon won’t necessarily purge a pipe quicker than a lower flow rate. Along with a diffuser on the end with the end of your argon hose usually permits you to use a higher flow rate. A homemade diffuser can be achieved with many metal wool , some perforated stainless sheet, and a amount of sheet metal.

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

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