MDJSalvage 
Lol I wasnt sure how to spell it, I typed how I thought it would be spelled on google and that popped up, must be something else lol.
Using a grinder will also heat them up, but not enough to create heat to generate that gas. I usually try to grind at the highest weld at the top. There's still going to be some residue there but not enough to realy matter.
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