[MW:29753] ASME B31.3 2016 Ed - PWHT table

Dears ,

Could you please let me know whether PWHT is required for piping as per ASME B31.3, 2016 Edition for the P No. 1 Gr.1 welded to itself and also welded with  P No. 1 Gr.2 up to 25 mm thickness of welds, as per the Table 331.1.1.

Also, there is an exemption given in Table 331.1.3, when we preheat of 95 Deg C for greater than 25 mm thk. Hence I am asking this query.

Please check and let me know.

With best regards,

Saravanan Sornam,

Korea

.

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