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

If you’re able to get it done and get it done well, you’re man and you will never go hungry. Nonetheless it takes some attention to detail to make it happen right.

What is important that separates the men from your boys or do i need to say, the actual welders in the rod burners is the willingness to follow along with procedures for welding stainless-steel. Procedures like waiting for the pipe to cool in between passes, keeping the hot tip of the rod shielded with argon, snipping the top in the tig welding rod when it gets crapped up, keeping your tungsten sharp.

One of many procedures I am talking about is PURGE. Metal absolutely must be purged with argon gas in order to prevent sugaring. Sugaring can be called granulation yet it’s severe oxidation it doesn’t matter what you refer to it as.

You cant even make do with tack welding lacking an argon purge that shield the rear side or inside the pipe. Exactly how do you undertake it? How can you protect the trunk affiliate with argon?

Usually it’s done with aluminum duct tape. The ends of an metal pipe are taped shut and the whole inside is purged with argon gas. Perhaps the opening from the pipe joint itself is taped to ensure that argon can fill the whole pipe and push out any oxygen. The tape is peeled back adequate to acquire a tack after the pipe is purge enough.

What is enough? The only way to tell for certain is to use an oxygen analyzer. A bic lighter will not do just fine. Even 2% oxygen content will blow out a bic lighter. And 2% oxygen will result in a black root pass.

There are a few other smart solutions to look into the purge but an oxygen analyzer will be the sure way.

Here are a couple tips that will help get a good purge about the stainless-steel pipe you weld.

Make certain there’s no water within the pipe…not even a drop. One drop of water will throw a monkey wrench within your purging until it evaporates. Remember what’s in water? Hydrogen and oxygen.

Poke a vent hole within the uppermost placed you can find. Imagine argon as if it absolutely was water. Which is heavier than air, it’s going to fill up any space like water, displacing the environment since 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 around the end from the end of your respective argon hose usually allows you to make use of a higher flow rate. A homemade diffuser can be achieved with many stainless steel wool , some perforated stainless sheet, as well as a little bit of sheet metal.

After you verify a fantastic purge, you’re to tack. Peel the tape back adequate to tack and let cool a bit and re tape. Then tack again 180 degrees apart. Continue until all tacks are in place.

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