Reinforcement of openings in jacketsed vessels.
Thread Content
The person I consulted earlier said that for the N3 port, it is also necessary to check the external pressure stability of the connecting pipe. For reinforcement through openings, after removing the jacket, the design pressure of -0.9 MPa should be used for the reinforcement at the openings on the container. Is this approach correct? (~_~;)
What’s going on? Can’t upload the image!
You might need to set the browser to compatibility mode...
It would be appropriate to use an internal pressure of 0.9 to evaluate the reinforcement through the opening in N3, as N3 can also be considered an opening under the internal pressure of this jacket chamber. Additionally, the A required for external pressure reinforcement is only half of that for internal pressure; using -0.9 is likely not appropriate. It’s just my personal opinion; I’m not sure if it’s correct.
The structure is unreasonable! The jacket at this pipe outlet should have an inward flange, and the pipe fitting should be welded only to the inner cylinder.
This depends on how the N3 connection and the jacket are connected. Under normal circumstances, as mentioned on the 10th floor, it should be checked thoroughly in the jacket. In this way, the opening at N3 is not subjected to the pressure from the jacket; therefore, it only needs to withstand a pressure of -0.1 MPa from the inner cylinder ； If the N3 connection and jacket are also of welded construction, it actually goes beyond the concept of ordinary connection reinforcement. The N3 fitting has become a connector that links the inner cylinder and the jacket. It is best to perform a stress analysis at this time. As a conservative approach, the reinforcement calculation for the openings is carried out assuming that the inner cylinder is under a pressure of -0.9 MPa (I think this is acceptable; however, there is no basis for checking the reinforcement of the openings at the jacket as well)