After a few bends and flares get made in that stuff, what's the chance that- - - -just maybe- - - - -a slightly weak spot in a weld might be stressed by a bending tool or a flaring operation? "Free" could get terribly expensive in that case.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!