On Wednesday, July 9, 2014 2:39:26 AM UTC, Ignoramus2738 wrote:

And what if you are operating in the real world?



Where you do not have an X ray machine?



i


If you do the welding and watch the puddle, you can know if a mig weld is good.

Like Clare said. He would trust a mig weld done by a welder that has demonstrated that he is a good welder.

But if you are not sure that you can tell that you are getting good penetration by watching the puddle, then you had better have a way of testing. I trust my mig welds especially the ones made with dual shield wire.

Dan