Whether RT testing is required for Class B joints between WN flanges with DN≤250 and piping, as well as for Class B joints between piping components
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I would like to ask all colleagues in the industry: For equipment governed by GB150, and in cases where the drawings specify non-destructive testing of type A/B without any other testing requirements, is RT radiographic testing mandatory for type B joints between WN flanges and pipes with DN≤250, as well as for the type B joints between pipes, in accordance with the specifications outlined in types A/B of the drawings? I hope those who work on manufacturing pressure vessels can provide an answer. Thank you!
It depends on the specific conditions of the equipment, such as pressure, temperature, and the hazard level of the medium.
It depends on the situation. For manufacturers, unless the drawings specify non-destructive testing of type A/B, no further testing is required if there are no other instructions. If welding on one side is involved and the welder is not trusted, that’s a matter for management. Technical staff should not worry too much; when it comes to design, factors such as the medium and the conditions of the equipment need to be taken into account
This design diagram must be clear. . . There is nothing clear to make it clear.
It shall be determined based on the specific circumstances, and specified in the drawings
It depends on what the designer intends; if nothing is said, then no action will be taken.
The designer determines it based on specific conditions, such as pressure, temperature, and the hazard level of the medium.
It depends on who designed it; according to the standards, the inspection requirements for the welds of these connection flanges are determined by the designer. If it is designed and manufactured internally, the design drawings shall specify these requirements. If the design is done by an external party and the design drawings do not specify details, it becomes difficult for the manufacturing unit to proceed. It is best to communicate well with the design party to obtain a clear response.
Routine containers do not require radiographic testing of these flange connection welds; the decision should be based on the material and the toxicity level of the medium. However, large design firms often fail to provide specific requirements, and ambiguity can lead to problems.
Thank you for the explanation from Haiyoumen, thanks!