Ahead of starting I do want to say there are not many places that will give you the opportunity to find out how to TIG weld thin wall stainless steel pipe. I was fortunate enough to have Fluor train me and am extremely thankful for becoming able to attend their education program! Fluor is the only cause I got to study this skill!
What I can share is that TIG welding stainless steel pipe is not substantially tougher than carbon steel pipe. There are a few guidelines to comply with and you must be able to choose it up swiftly! The rules are as follows:
Purge your pipe nicely.
Every thing must be clean.
Retain your tungsten moving at all times.
Allow https://stainlesseurope.es/es_ES/c/Tubos-y-Barras-huecas/16 to cool before the subsequent weld.
Stainless steel pipe have to always be purged. The result from a less than ideal purge will result in the root to get contaminated. The slang term used in the field for root contamination or oxidization is “sugar”. Sugar is triggered from the weld being exposed to oxygen in the atmosphere. The weld joint should be taped off and only untapped when you are ready to weld that portion if the pipe.
In basic TIG welding calls for a pretty clean weld joint but with stainless steel this is an absolute will have to! The tungsten need to be clean. That signifies cleaning it soon after every single restart and pass. The weld joint have to be filed ahead of just about every pass except the root pass. Even the bevel requirements to be filed on the hot pass and all color modifications need to be filed to pure metal at all times. Failure to file all heat affected areas will outcome in the filler wire not being in a position to flow into the joint smoothly.
Moving your tungsten speedily is quite important when TIG welding stainless steel pipe. The trick to keep away from melt by way of and overheating the pipe is to move swiftly. From the moment you strike the arc that tungsten desires to be moving. Do not commence and wait for the metal to heat up prior to moving. Ideally you want to commence 3/4 of an inch just before the location you will commence adding filler wire also. This will permit sufficient preheat for the filler wire to flow properly. Ideally when the weld is finished it should have a copper colour to it. If it is gray or dark in nature you are employing also much heat or moving as well slow!
When it comes to stainless steel the heat this metal absorbs and holds is unbelievable. Now add thin wall pipe to the picture and you have a radiator that is normally ready to overheat! You want to permit the pipe to cool sufficient that you are able to touch it with your bare hand. TIG welding stainless steel pipe calls for a lot of waiting for the pipe to cool. It only takes an extra inch of weld as well quickly to ruin the weld joint!