Re: [MW:14982] Need PWHT IN TEST pice

You should perform either mechanical testing or NDE of the test piece
to check the soundness of weld metal. If you are performing RT, then
there is no need of PWHT as the delayed cracking and hardness is not
related to the talent of welder. But as per ASME BPV Section II Part A
SA 335 clause 12.3, NDE should be performed after heat treatment for
acceptance..means you need to perform NDE only after PWHT at your
job..
Rejoy Thomas(QA/QC Engineer)
UB Engineering Ltd.

On 7/28/12, vempati anjaneyulu <v.anjaneya@gmail.com> wrote:
> Please refer clause nos. QW353 and QW356 of ASME Sec.IX. PWHT is not
> an essential variable for welder performance qualifications, hence not
> required to do PWHT for test coupons.
> Anjan
>
> On 7/28/12, Santosh Patil <raj.san23@gmail.com> wrote:
>> Dear weld expert
>>
>>
>> I have a one Question that is in welder test P91 Material with welding
>> process gtaw for root and smaw for fillup and caping.
>> Preheating also given 250 degree. After cmplete the test pice can it is
>> necessary do pwht for welder qualification and Ndt process .
>>
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>
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