Welding for stainless steel depends on many factors. There are many factors to consider, such as what kind of stainless and what thickness, which application, and what industry it is used.
The majority of stainless steel used in the foodservice sector is 300 series stainless. You will see welded stainless sheet metal on all of the counters, shelves, and cookers at any fast food counter. Because it is resistant to rust, 304 stainless steel must be used in food preparation areas.
All welds should be done in a way that does not trap bacteria or another crud. Protect the stainless steel welds' backsides with argon to prevent them from becoming sugary and laden with pits that could harbor bacteria such as salmonella. You can get more information about the best stainless steel pipe fabrication at https://tiptigusa.com/stainless-steel-welding-applications/.
All wire brushing should use a stainless-steel brush. Welds that aren't perfectly smooth should be blended with an abrasive wheel, and then cleaned with alcohol. Because spatter or slag is absent, tig welding is almost always the most efficient process.
There are many stainless steel alloys that are used in aerospace and aviation. There are many of them. There are many options. Precipitation Hardening stainless is another family that is used on commercial aircraft. The majority of the stainless steel used in nuclear piping systems is TIG welded.