Can ordinary DC welder weld stainless steel pipes? What kind of covered electrode is used in covered electrode? Is the grounding positive or negative? How to control the current?

It depends on what stainless steel you are welding. Commonly used stainless steel is 304,308 (covered electrode of A 102, AC and DC are acceptable, whether it is positive or negative). Specific stainless steel can be discussed. Generally speaking, the current depends on the diameter of covered electrode. The covered electrode current of 3.2 is about 90~ 1 10A, and that of 4.0 is about 120~ 140A, which can also be adjusted up and down.

This skill is generally based on welding electrode technology, nothing special. Pay attention to the groove angle of the welding plate, and make the solder joint better if it is slightly larger (70 degrees).

I hope my answer is useful to you. If you are satisfied, please adopt it ~

A 102 coated covered electrode can also be used, because coated covered electrode has better corrosion resistance and can be welded with 20 1.