Re: [MW:17239] WPS with PWHT below the lower transformation temperature

As Mr Pal written, temp is restricted as per 31.3
Pandithan
welding consultant

On 3/27/13, Biplab Pal <biplab.mech@googlemail.com> wrote:
> Dear Mohd.,
>
> As per ASME B-31.3 Table 331.1.1 you have to do PWHT within the specified
> range of 593 deg C to 649 deg C (for P-No-1) you can not do or write beyond
> that limits.
>
>
>
> On Sat, Mar 23, 2013 at 10:20 AM, mohd <mohd52100@gmail.com> wrote:
>
>>
>> Dear all,
>>
>> WPS details as per ASME IX Design Code :B31.3
>>
>> 1) GTAW + SMAW (3mm+ 24mm)
>> 2) Material API 5L x52 Thk : 26.97
>> 3) PWHT 600 +/-20 Time : 1Hr 20min
>> 4) No impact.
>>
>> Can I Re Write WPS with Temperature 670+/-20 as per As per QW-407.1 a
>> (2)
>> ? ( up to below Lower transformation no need re qualification )
>>
>> Need expert Opinion.
>>
>> ( QW-407 Postweld Heat Treatment
>> QW-407.1 A separate procedure qualification is
>> required for each of the following:
>> (a) For P-Numbers 1 through 6 and 9 through 15F materials,
>> the following postweld heat treatment conditions
>> apply:
>> (1) no PWHT
>> (2) PWHT below the lower transformation temperature )
>>
>>
>>
>> Regards,
>> mohd.
>>
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>
>
>
> --
> Thanks & Regards
> Biplab Pal
> Welding Inspector
> E-mail: biplab.mech@gmail.com
>
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