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Originally Posted by Kevin_1G_Drummer
Mig can weld alumium piping as long as you set everything right, and you have a spool gun or a push-pull setup.
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A MIG setup to do aluminum will cost well over a grand, and doing thin aluminum with them is tricky. Spool guns are really meant for production work and long beads. They also tend to put a ton of heat into the material and warp flanges.