We have A216 WCB valve (Thickness of the part to be repaired is more than 100 mm)
At current, due to cracks in bolt holes the excavated are is 75 x 38 mm with depth of 40 mm approximately
As per A216 WCB Section 10 Repair by Welding
10.3 Castings containing any repair weld that exceeds 20 %...
Why lifting for inspection is a preferred in your opinion.
I think if you find a good inspection company with LRUT skills you can atleast do reliable inspection. Do share all your concerns with LRUT operator and also share all the data like isometrics,welds details, support details (welded not...
Its a good question posted.
I have experienced too non-standard repairs owing to knowledge of the inspector and management present at that plant.
For instance:
- Patches with Corners not rounded.
Though the repairs were rectified after inspection by removing the plate and reinstalling as per...
Dear All
Good day
We have an Ammonia storage sphere. It was heat treated and carbon steel material.
For supporting structure on top reinforcement pads are installed. On these reinforcement pads lugs are welded.
Query is that we are going to replace the lugs due to external corrosion. There...
r6155: Cost matters. Thanks for the reply.
However, how far a modification can be considered a modification. We are welding the vessels with 10 each external pads for installing the platform. Comparing the size of vessel it is minimum.
Hello
We have a vessel on ammonical water service as per ASME SECTION VIII DIV 1.
It was imploded due to vacuum. And was restored due to mechanical jacks and pneumatic pressure.
It was derated after FFS level 3 assessment.the study included details of all the welded patches in analysis.
My...
Have u performed any pneumatic test or soap film test. Or any ammonia etc test.
To identify which of these have thru opening.
Rectify those. Rest cracks try to identify depth. For record and monitoring.
Have u tested rest of the vessel with installing or welding temporary blinds. If yes.
Then only one field joint is not tested. Which should be enhanced in ndt. RT or UT 100%.
Its a normal practice.
Hello
We have a vessel on ammonical water service as per ASME SECTION VIII DIV 1.
It was imploded due to vacuum. And was restored due to mechanical jacks and pneumatic pressure.
It was derated after FFS level 3 assessment.the study included details of all the welded patches in analysis.
My...
Branch connections normally leak may be indicating the high vibration on the lines. First of all check for high vibration of lines. May be some machine or some control valve up stream is the reason. Second check the supports on that line such that they should be as per design. If you dont find...
Additionally, do include Dye Penetrant testing of the old pipe BEVEL AREAS before welding new pipe. It will a quality check and additionally, may prevent many defects in the pipe weld.
This is from experience based.
Hope it helps.
Thanks
