Erickson Calderon posted an update 1 year, 2 months ago
Metal pipe welding is gravy work. Always has been. Always will probably be.
If you can do it and undertake it well, you are the man and you’ll never go hungry. However it takes some focus on detail to get it done right.
The biggest thing that separates the men from the boys or can i say, the genuine welders from your rod burners will be the willingness to follow along with procedures for welding stainless-steel. Procedures like looking forward to the pipe to cool down the involving passes, maintaining your hot tip from the rod shielded with argon, snipping the tip from the tig welding rod in the event it gets crapped up, keeping the tungsten sharp.
One of the many procedures Come on, man is PURGE. Stainless absolutely must be purged with argon gas to prevent sugaring. Sugaring is additionally called granulation but it is severe oxidation no matter what you call it.
You cannot even pull off tack welding without an argon purge that shield the trunk side or inside the pipe. Exactly how do you do it? How do you protect the trunk side with argon?
Usually to control your emotions with aluminum duct tape. The ends of an stainless steel pipe are taped shut and the whole inside is purged with argon gas. Even opening within the pipe joint is taped to ensure argon can fill your entire 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 best way to tell for certain is with an oxygen analyzer. A bic lighter will not do the trick. Even 2% oxygen content will fly out a bic lighter. And 2% oxygen will lead to a black root pass.
There are many other serious solutions to look into the purge but an oxygen analyzer could be the sure way.
Below are a few tips that will assist you get a good purge on the stainless-steel pipe you weld.
Ensure there isn’t any water within the pipe…not even a drop. A unitary drop of water will throw a monkey wrench in your purging until it evaporates. Remember what is in water? Hydrogen and oxygen.
Poke a vent hole within the uppermost placed you can discover. Imagine argon like it was water. Because it’s heavier than air, it’s going to refill any space like water, displacing air mainly because it fills every nook and cranny.
More purge gas flow is not always better. An increased and turbulent flow of argon will not likely necessarily purge a pipe quicker when compared to a lower flow rate. Along with a diffuser on the end in the end of your argon hose usually allows you to utilize a higher flow rate. A homemade diffuser can be produced with a few stainless steel wool , some perforated stainless sheet, as well as a little bit of sheet metal.
As soon as you verify a great purge, you are to tack. Peel the tape back ample 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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