Welder has qualification on welding to 9mm thk plate,can he perform welding on 13 mm jointing?

Question

Welder has qualification on welding to 9mm thk plate,can he perform welding on 13 mm jointing?

Answer 1

I'm not a welder.  I did have a father-in -law who was.  From our conversations, I don't see why you can't.

I remember how he used to tell me the importance of filling the weld with no gaps.

If you can do this with 9mm, I don't know why you cannot with 13mm.  Maybe you work slower?

There may be much that I don't know.