Is flaw detection required for the large pipe openings outside the container flange face as shown on the drawings?
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This post was last edited by My 1102 on 2020-7-3 at 11:43. There is a container; the design institute has shown elbows outside the flange area on the drawings. Is it necessary to conduct flaw detection? Is it possible to avoid such detection, and what are the reasons for that? 150 and the tolerance specifications specifically state that only the area within the first flange face constitutes the vessel body
No, it’s not possible. Even if it doesn’t belong to the main body, since that component is connected to your equipment and bears stress in the same way as a weld, it must be inspected in accordance with the standards for pressure pipelines. For pressure pipelines, RT or UT or other testing methods are also required for circumferential welds; personally, I recommend conducting inspections in accordance with the requirements for Class B welds of the equipment itself.
Many of the manholes at the top of reactors or the cold hydrogen inlets have this structure; those manufactured by your company are part of the equipment itself, and they must comply with the requirements for non-destructive testing of equipment.
Follow the requirements for Class B welds on the fittings of the equipment – cost is not a concern!
According to the pressure pipeline installation specifications, what you mentioned should fall under the equipment system. If there is only one crack, it needs to be inspected according to the sampling ratio.
This is a pipe, not a piece of equipment; pipes do not require drawings, unless it involves special flanges or special welding techniques
The sectional view lacks section lines; there are rules regarding when to include them and when not to. The color of the center line is incorrect, the outline lines aren’t thickened, and it’s the first time I’ve seen equipment and pipelines drawn together
According to the standards, it does not belong to the container itself, and the inspection requirements for containers do not apply to it. However, it belongs to pressure pipelines and should be designed, manufactured, inspected, and accepted in accordance with the requirements for pressure pipelines. Pressure pipelines are also required to undergo non-destructive testing according to regulations. So it still needs to undergo non-destructive testing. In other words, your approach is correct, but you cannot avoid testing.