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Re: [MW:23893] Re: PWHT thickness requirement as per ASME B 31.3 2014

By Materials & Welding

Adding to it-"if End User or Service requirement states, then PWHT shall be required and to be identified in drawing or applicant documents".

Regards, Vino

On Nov 17, 2015 4:37 AM, "GrazG" <ing.grazianograsso@gmail.com> wrote:
I confirm for ASME B31.3-2014 all tickness of Group P1 the PWHT is not required. The only prescription is the PREHEAT at 95 °C for thickness >25 mm.
This is my interpretation, correct me if i'm wrong!

Il giorno martedì 1 settembre 2015 10:42:11 UTC+2, Mohd Siraj ha scritto:
Dear all,

As old ASME B31.3-2012  we know it was above 19mm req pwht,

now i read ASME B31.3-2014,little confused me with pwht exemption and pwht requirements and control thickenss 331.1.3?

q1- what is thik req for pwht for P1 as per b31.3 2014 ?

q2 : for P1,mentioned more than 25mm thk and 95C preheat exemption from pwht so less than 25mm not require pwht ?


regards,
mohd.

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