Dear Riaz ,
Copper inclusion is normal in auto welding of pipelines . Considering your thickness the extent of copper inclusion at root is higher . Identify the area where this issue prevails buy making trials and removing/cutting the joint in form of rings . You can therefore visually see the root and location . Explain the issue to Auto welding technician and see if he can modify the root parameters . But if the change is parameter is beyond the allowable range you need your PQR to be re qualified .
Between did the AUTO UT or your approved NDE pick up this copper inclusion???4
On Tue, Dec 4, 2018 at 10:38 AM Ri@z <riaz.rafeeque@gmail.com> wrote:
Dear All,--We are introduced auto welding on 6.62 MM thickness , API 5L X 70 . J groove prepared with 2 mm root face and zero root opening.Root has supported with copper back up strip/ShoesBut after welding we observed that copper back up strip is melted and fused with root run.Kindly help to resolve the issue. What are the possible reason for the problem ??With RegardsRiaz Rafeeque
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
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Best regards,
TDK YOKESH
PH : +917092847368
https://materials-welding.blogspot.com/
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