Preheat to 95degC prior to welding and use multilayers to avoid PWHT for P-1 material.
Only decrease in preheat temperature greater than 55degC is an essential variable as per ASME Sec.IX and hence revise the WPS to indicate preheat min 95degC without any need for qualifying PQR and perform welding.
Thanks & Regards
J.Gerald Jayakumar
On Wednesday, 16 December, 2020, 12:38:04 pm IST, bilal wahla <bilalwahla047@gmail.com> wrote:
Dear J.Gerald ,
Material is P-1.
On Wed, Dec 16, 2020 at 9:44 AM 'james gerald' via Materials & Welding <materials-welding@googlegroups.com> wrote:
--Generally the Pressure containing Pipe Thickness is taken as the Governing thickness when welding non-pressure part support.But in the latest version of code there are some exceptions for some P-No's and if you could be specific it will be clear.Thanks & Regards
J.Gerald Jayakumar
On Wednesday, 16 December, 2020, 12:04:22 pm IST, bilal wahla <bilalwahla047@gmail.com> wrote:--Greeting ALL,On my project we are doing PWHT on Thickness basis, Pipe thickness is 30.18mm,Will we do PWHT of Welded Supports as per B31.3?Bilal ArshadP.W.H.T QCIMobile: +966 580181061
Email: bilalwahla.047@gmail.com
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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Respected Sir,
Please find the enclosed file.
Bilal Arshad Wahla
P.W.H.T QCI
Mobile: +966 580181061
Email: bilalwahla.047@gmail.com
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