What do you professional welders do when...

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I'm assuming a good portion of the members on this forum weld for a living so I'm curious what you guys do when you notice an imperfection in a weld? Do you grind down the whole thing and start over, or just the bad part?Also, what is the proper way to weld outside corners assuming it won't be ground down? Say on two 45* mitered pieces of 2" tubing with a 14ga wall, the sharp corner on the outside. The corner welds I've seen that I try to make mine look like almost seem like the weld chamfers the edge and it sits inside where the corner used to be. Most of my corner welds stick out and just add to the corner and if I turn my settings up, I just burn through it.John 3:16(2) Miller Pheonix 456(2) Millermertic 252Dynasty 210DXHobart 210MVPDoringer D350 SA Cold SawScotchman 350LT Cold SawWebb 10x50 MillWebb 15x40 LatheGeka Bendicrop Ironworker
Reply:My $0.02I grind out the bad part only if possible. Make a nice tie-in and it won't matter.For the tubing you describe, I grind off the sharp corner and then weld.  This give full penetration and makes it easy to blend down with a flap disc if that look is desired.Unless it's TIG, then the corner is just blended together.Not a pro, let's call it semi-pro Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:Originally Posted by MinnesotaDaveMy $0.02I grind out the bad part only if possible. Make a nice tie-in and it won't matter.For the tubing you describe, I grind off the sharp corner and then weld.  This give full penetration and makes it easy to blend down with a flap disc if that look is desired.Unless it's TIG, then the corner is just blended together.Not a pro, let's call it semi-pro