Yes, there is no issue in doing that.
You can use only GTAW if the thickness range with GTAW on the qualified procedure covers up to the maximum thickness of 3" pipe that is 11.13.
Octane
On Sat, Sep 28, 2013 at 6:28 AM, sumod s <sumod.sadhupuram@gmail.com> wrote:
--Dear experts,Material is Gr.P22 alloy, thickness is less than 13 mm. The WPS which I have for GTAW need PWHT. But since the thickness is less than 13 mm I need to avoid PWHT.Unfortunately I don't have WPS for GTAW with out PWHT, but I have a GTAW + SMAW wps without PWHT which will cover the required thickness range. Can I use GTAW + SMAW combination for welding 1.5"(7.14 mm thick), 2" (8.74 mm thick) & 3" (11.13 mm thick)pipes.sumod
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