GTAW process without filler metal: Which is the weld metal thk "t"? which are the limits of the WPS for a given "melt metal" (t)?
mauro

I think so it mean:Itself melted THK,for exemple Tube to Tubeshell the first welding.

In my opinion it is the DEPOSIT WELD METAL THICKNESS, only in this case the metal is not additional filler metal, it is molten base material. You can measure it after cutting of a test piece.
Cool question.
DK