Structure of high-pressure butt-welded valves
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This is the first time I’ve encountered such high-pressure butt-welded valves; I’m not sure why they have a structure similar to a flange. How should non-destructive testing of the welds be carried out in this case? I seek advice from experts
The image shows a check valve; some gate valves also have a similar structure
Are you familiar with valves of this structure?
What does a self-sealing structure refer to?
What is the structure of the bulge at the connection point with the pipe? The non-destructive testing company stated that it is not possible to apply patches to the weld, so radiographic testing cannot be carried out