For pressure vessel heads: should holes be made first and then the welds inspected, or should inspections be carried out first and then holes made?
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As titled 11111111111111111111111. Thank you. Is there any evidence?
Inspect first, then make the cut. The end caps are generally manufactured by external contractors, which helps to clarify responsibilities...
If the head has splice welds, it is more convenient to perform flaw detection first before making the cut.
Haha, this question is meant for amateurs. Before cutting the materials, they are rechecked to ensure that they are of good quality; only after that is cutting and assembly carried out. At this point, there’s no need to worry about defects appearing in the materials during processing. The remaining questions don’t need an explanation, right?:lol
Panel assemblies with welds need to be inspected for defects first; usually, there are no welds on the welds themselves:P
Generally, large end caps are assembled from separate parts (through external suppliers) and require flaw detection before holes are drilled. If they are formed as a single piece, they have already passed inspection before entering the factory; in that case it shouldn’t be a problem, and holes can also be drilled first followed by welding.