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.
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-- 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 :B31.31) GTAW + SMAW (3mm+ 24mm)2) Material API 5L x52 Thk : 26.973) PWHT 600 +/-20 Time : 1Hr 20min4) 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 TreatmentQW-407.1 A separate procedure qualification isrequired for each of the following:(a) For P-Numbers 1 through 6 and 9 through 15F materials,the following postweld heat treatment conditionsapply:(1) no PWHT(2) PWHT below the lower transformation temperature )
Regards,mohd.--
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Thanks & Regards
Biplab Pal
Welding Inspector
Biplab Pal
Welding Inspector
E-mail: biplab.mech@gmail.com
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