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Originally Posted by Flatheadyoungin  I didn't make it to pipe welding level but my instructor always said something about MIG wasn't approved for pipe.......dunno.....
it...... |
Not entirely true. There are processes that allow MIG for pipe I know because I have been welding it for over 30 years. Some of the largest pipe lines have been welded with automated MIG process. These pipe lines supply oil from the high Arctic to the US through Canada. Also these procedures were developed by ASME - American Society of Mechanical Engineers, an American Government Agency.
Only thing about MIG is the cold start and for Tacking/fitting it is not desirable.