Dear friend,
when ever joining of two different P nos ( 5A+4) welding, following points to be taken care :
1, Pre heating temp shall be maintained as higher Pno ( 5A)
2, PWHT temp shall be maintained as per higher Pno(5A)
3, Consumable shall be maintained as per lower Pno( 4)
Regards,
Sankaran.SP
Welding & Metallurgy expert.
On Wednesday, 24 February, 2021, 03:17:21 pm IST, Vishwas Keskar <vvkeskar123@gmail.com> wrote:
Apply the rules applicable for Higher P.No. of the two materials being welded.
P no 4 to P No 5A _ Apply criteria for P NO 5A materilas. Also consider pre heating addresed in WPS
On Wed, 24 Feb 2021, 07:13 EmaD FaRaHanI, <emad.farahani@gmail.com> wrote:
Hello all,As Per ASME Sec VIII, appendix R preheat criteria are determined for different PNumbers.--But in case of welding of one BM from PNumber A to PNumber B, how can we determine the preheat criteria (temperature and thickness)?Thanks,
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