Re: [MW:24421] PWHT

Dear sir,
Yes as per as time is concern PQR is accepted. Anyway 407.2 will be non essential variable for SS as impact is not require.

But same PQR had PWHT at 700 degree C. Heat treatment chart does not showing any range so only single value is available in PQR. Now as per 407.1 b specific temperature range is essential variable in case of P8. In same situation can I support PQR of 700 degree C for execution of production weld which will be PWHT at 705+/-10 degree C?

Regards,
Maulik
Welding engg.

On Mar 1, 2016 6:16 PM, "Mohd Siraj" <mohd52100@gmail.com> wrote:

QW-407.2 according to which the PWHT time of PQR shall be at least 80% of the production welding time.

10Hr 80% is 8hr.hence it is accepted.

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