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Re: [MW:36155] RT before PWHT for P1 (NACE/ H2 service)

By Materials & Welding
For P -1 material , there is no restriction, you can conduct either before or after. Check the client spec if anything mentioned

On Tue, Sep 8, 2026 at 5:04 AM 'ranajit chatterjee' via Materials & Welding <materials-welding@googlegroups.com> wrote:

Dear Sirs,

As per ASME B31.3 clause no.341.3.1(a) mentioned P Nos.3,4,5A,5B,5C AND 15 materials examination(RT/UT) shall be performed after completion of heat treatment. But no information for P1 material whether NDT performed before or after PWHT.

Please advise can we perform NDT(RT/UT) before PWHT activity for P1(NACE/H2 service) material or not.

Regards,

Ranajit Chatterjee

9995018265

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