½ inch diameter—did you mean ½ inch OD or ½ inch NPS.
The welder is qualified to weld out side diameter from ½ inch (assumed
that the initial qualification done with ½ inch OD pipe) to unlimited.
Thickness qualified with GTAW is maximum 6mm. so he is not qualified
to weld 7.47mm thick pipe with GTAW alone.
What he can do is weld GTAW-6mm and balance with SMAW
There is no provision in Sec IX to combine the thickness for welder
On Feb 15, 1:56 pm, Zakaria ghrab <zakaria.gh...@gmail.com> wrote:
> Hi all,
>
> We have one welder qualified in GTAW process 1/2 inch diameter 2mm thick
> (cover diameter greater than half inch and until 4 mm thick), the same
> welder qualified GTAW/SMAW 3" thick 5.49 with 3 mm welded GTAW, means
> qualified for diameters greater than 2.1/2 inch and thick until 11 mm.
>
> We have to weld pipe 1/2 inch thickness 7.47 mm, my request is, may this
> welder do the job for this weld?
> ASME sec IX authorise to combine the range qualification of welder if is
> qualified two times ? Please give me the paragraph
>
> Kind regards
>
> --
> GHRAB Zakaria
--
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