"Non-metallic inclusion. Where is it located through the thickness? Are there any more similar?"
Yes there were more, grinding the surface upto one mm resulted in the removal of these partially rust filled inclusions.
Thanks for the response.
This feature was developed adjacent to the welded region in riser containing an upper conical shaped section which is connected at the large end of the cone to a cylindrical sleeve that fits around and overlaps a portion of the lower riser in FCC reactor system.
Kindly can someone help me identifying this feature?? Is it a crack or some other feature resulted from in service application.http://files.engineering.com/getfile.aspx?folder=d25d254d-57f3-4425-94ab-421aedaf3062&file=50X2.jpg
Yup autogenous weld. This is the same image at 400X, Can you comment on the phases present in the weld region.http://files.engineering.com/getfile.aspx?folder=fb6c0dd2-9304-4c9b-ad4a-98377e21812c&file=micros.jpg
What phases could be present in welded region.
Parent metal is TP316. What changes are observable in share structure. Image magnification is 100Xhttp://files.engineering.com/getfile.aspx?folder=b874ae9c-15bf-4740-b7ec-5bc9e1f28ea9&file=2.jpg
one of the vessel we had the issue of preferential weld erosion corrosion as compared to parent metal (shell course/dished head), up to the height of ~3.5m from bottom dished head. It was repaired by welding.
Advice on suitability of weld overlaying of above specified affected area (say 3.5 to...
