ASME IX, groove weld during WQT limits for Fillet Weld production

[David Chris]

For ASME IX, in general, I am aware that a groove weld during WQT will qualify for all thicknesses for actual production's fillet weld.
However, is there a minimum required thickness for this groove weld during WQT?

We used a 5 mm plate for WQT groove weld, Single-V, GTAW + SMAW. GTAW by other welder/before WQT; The GTAW pass was about 4mm and the SMAW (excluding capping/reinforcement) was just 1 mm. Does this 1 mm pass qualify us to weld ALL thicknesses for fillet weld during production for the SMAW process?

During production, the joints are all T-Joint fillet weld using SMAW process.

[Muhammad Asif]

Hi David, 

There are two points in WQT.

1. Thickness of Base Metal -T

2. Thickness of Weld Metal -t

When you use a combination of two processes or two welders then they are qualified with reference to the deposited weld metal. If the first welder deposits 4mm Thickness, then you will measure the thickness of Root and hot pass, and for the other welder you will measure the remaining thickness of base metal to be welded plus the thickness of Reinforcement (Caping).

Thanks & Best Regards,

Muhammad Asif

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[David Chris]

Hi Asif,

I think you have misunderstood my question. I'm talking about the minimum thickness for Groove (if any) to fully qualify ALL fillet welds 

[Shersha Shereef]

PFA

Regards 

Shersha shereef

On 17 Apr 2024, at 5:11 AM, David Chris <wdavidch...@gmail.com> wrote:

Hi Asif,

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[Burak Bostanoğlu]

PE (4G) butt weld covered all positions of but weld and all positions of fillet weld except PG(downward). But firstly you should read specs of your project. Sometimes they write some rules in related spec.

17 Nis 2024 Çar 05:11 tarihinde David Chris <wdavidch...@gmail.com> şunu yazdı:

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