Pressure vessels without AB welds
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If a pressure vessel does not have AB welds, but instead uses seamless tubes and flanges connected by fillet welds, is it still necessary to specify radiographic inspection in the drawings? Have you encountered similar situations? I’d appreciate some advice.
Of course, there’s no need to write it.............
What is this product? Heat exchangers also have Class B welds! No end cap? Are both ends sealed with flanges? I have never seen products without Class A or B welds. Seeking advice!
The heat exchangers have no butt joints; all connections are corner welds.
For pressure vessels, not writing it seems a bit off as well.
Then the head can only be welded directly to the flange.
In my opinion, requirements for non-destructive testing should be established! Reason: The drawings specify the requirements for non-destructive testing of welds as they exist in theory; in practice, such testing is not necessary if no welds are present. However, if the drawings do not specify anything, it is unclear how to conduct testing in cases where welds are actually present. I hope this helps you.
Unless you are certain that the manufacturing process can be carried out entirely in accordance with your design specifications, if issues such as seams occur during production and you have no rules to address them, there will be problems, right?
Seamless cylinders – such as oxygen cylinders – have no welds, and welding is not permitted
What is the length of the seamless tube container? Is concatenation allowed? If allowed, there will be Type B connectors.