Dear Experts,
-- For one of our project,
With reference to the sketch shown below, we are going to weld 4 number of Single V Butt joints for A335P11 to itself ( P No. 4 ), pipe Thk of max 28.6 mm by using GTAW & FCAW process ,
Preheat Tempr. of Min. 120 Deg C ( Plan to use Burner ) and PWHT from 650 to 707 Deg C as per ASME B31.3 code.
After we complete the welding in our shop and bring back to the normal ambient tempr. around 15 Deg C, can we do PWHT after 1 or 2 days gap and then we do RT and PT ?
I worry that, during winter in Korea, the ambient tempr. may drop to Minus 10 Deg C.
As there is no weld spec from client for P No.4 , can we do PWHT after 2 days gap.
Please suggest me with any weld instructions for P. No.4 , Preheat maintenance, in order to avoid any crack after welding and with delayed PWHT condition.
With best regards,
Saravanan.Sornam,
Korea
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CALV1rkKyaKN%2BXoGTzSC7ok%3DnYVeUwbp1CYp-YyEJn2CYFrvebg%40mail.gmail.com.
No comments:
Post a Comment