Hot pass to be welded immediately after welding Root pass at higher Heat Input as specified by API 1104 for pipelines where time between root and hot pass is an essential variable. for CS & LAS.
IN DSS cold pass to be welded in single bead at 75% of the Root pass Heat Input to avoid over heating of root which may lead to formation of secondary austenite and intermetallic phases like Sigma phase etc.. which results in failure of ASTM G48 tests.
Thanks & Regards
J.Gerald Jayakumar
0091-8838619635
On Thursday, 16 May, 2024 at 02:23:17 pm IST, RITHVIK Suresh <rithviksuresh98@gmail.com> wrote:
Dear Experts,
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/f287cd81-3502-4980-892d-b924ca005c86n%40googlegroups.com.
1.Can anyone tell me what is meant by Cold pass in Dss/Sdss welding. Also please tell me the difference between Hotpass and Cold pass.
2.In DSS Pipeline welding Root pass is being performed with SDSS consumable and rest is performed with DSS consumable. Can anyone explain me why it is performed like this
Thank you
Rithvik
-- 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/f287cd81-3502-4980-892d-b924ca005c86n%40googlegroups.com.
No comments:
Post a Comment