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Re: [MW:35885] welder certification

By Materials & Welding
Goodday  venkateswara ,

The thickness range qualified in the WPS according to ASME IX is 1.5 to 30mm and the P no is 1 because the material is the same S355JR steel 


On Fri, 7 Nov 2025 at 04:59, venkateswara reddy Desireddy <dvreddy82@gmail.com> wrote:
In WPS document qualified material thickness range and P number range available, 
Based on that you can select the WPS.
As per ASME Sec IX you can use plate WPS for pipe. But must be required same P number.
Before using WPS you have to conform all essential variables.

On Thu, 6 Nov 2025, 6:47 pm Rilley Chellah Mulenga, <rilley.mulenga@ahkgroup.com> wrote:
Good day technical experts,

Can I use a WPS for S355jr thickness of 30mm plate in SMAW to qualify a pipe S355jr 6mm thick in SMAW ? your quick response is highly appreciated  

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RILLEY CHELLAH MULENGA
Materials Evaluation Head of Department
E: rilley.mulenga@ahkgroup.com
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RILLEY CHELLAH MULENGA
Materials Evaluation Head of Department
E: rilley.mulenga@ahkgroup.com
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