There are openings in the flange cover; how should its thickness be checked?
Thread Content
There is a pressure vessel with a flange cover having an outer diameter of 110 mm. There are openings on this flange cover through which pipes pass; the outer diameter of these pipes is 40 mm, their inner diameter is 16.5 mm, and the diameter of each opening is 42 mm. When performing verification using SW6, which value should be entered as the diameter of the openings? 42 or 16.5? Thank you
Refer to the section on opening reinforcement for the definition of opening diameter
GB150 states that reinforcement is required for openings in the shell; however, for openings of this size on the shell, no reinforcement is necessary. Should this be treated as a component?
If you enter the hole size, it means that overall reinforcement has been carried out, and the thickness of the flange cover naturally increases; the hole size you enter should be the inner diameter of the pipe plus twice the additional thickness. Another algorithm does not require input regarding the opening size; instead, it directly calculates the reinforcement for the pipe opening. It is also feasible to use the method of increasing the thickness of the flange cover as a means of reinforcement. However, the flange cover thickness calculated by the two algorithms differs; the final thickness can be chosen based on actual conditions :)
Refer to GB150 for reinforcement of openings in flat covers :) .
There are calculations for reinforcement with flat cover openings in 150. The opening diameter is neither the inner diameter nor the outer diameter. This post was last edited by bms on 2008-12-3 11:37.]
Based on the considerations for reinforcement through openings, if there are openings, it should be 42 I guess
It’s clearly stated in point 150: what should the size of the opening not exceed, and so on? Reading by oneself is the best; it’s very useful!
The opening diameter is the inner diameter of the pipe fitting plus twice the thickness allowance.