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Re: [MW:35961] WPS requalification for repair weld ASME B31.3

By Materials & Welding
Greetings 

Yes — only if the repair weld falls entirely within the qualified range and the PWHT performed meets the same essential variables as originally qualified.
If any variable in the repair (thickness, PWHT hold time, PWHT temperature, base material, filler metal, joint design) exceeds the qualified range, then the existing WPS cannot be used and a new PQR is required.
Best regards


On Wed, Jan 28, 2026, 7:49 AM Babur Khan <mbabur.bwp@gmail.com> wrote:
Greetings,
Need expert opinion for the following query:
Construction Code ASME B31.3, Qualification ASME BPV Sec. IX.
One of the WPS is qualified for Low temperature Carbon steel with impact testing and PWHT. The qualification range is 20mm to 36mm. 
PWHT is applicable (Project specification). Soaking time was 1 hr 30 minutes.
Question: Is this WPS qualified for a repair weld with this soaking time? 
Is a new PQR to qualify the repair joint?

Best Regards,

Muhammad Babur Khan Lashari
Project Quality Supervisor.
API 570, API 510, CSWIP 3.2.2. ISO 9001:2015

Mob: +966 58 2774568 / +966 51 0559680

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