Discussion on the effective reinforcement width B in perforated reinforcement calculations
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This post was last edited by gn_1984 on 2021-12-1 10:18. As the title suggests: When the structure (length) of the equipment casing is limited, and the effective reinforcement width available for reinforcement calculations due to the openings in the piping is less than 2dop, should the actual effective reinforcement width B be used in these calculations (where B is greater than dop+2δn+2δnt)? What do others do in such situations? Note: This situation is commonly encountered in the reinforcement calculations for openings in the shell of heat exchanger equipment.
If 2DOP cannot be achieved, follow what you said and enter the actual width
The actual effective reinforcement width should be entered; 2 times the opening diameter is the maximum value.
If there is sufficient margin, it’s no problem at all; if the margin isn’t large, it’s more economical to calculate based on the actual area, that is, by deducting the area of the bow-shaped gap caused by the insufficient cylinder length during the calculations.
This post was last edited by gn_1984 on 2021-12-1 14:13. Well, thanks to the three people who replied above for their affirmative answers; I understand it in the same way. :handshake:handshake
Seeing this B, I think of another question: if the conditions for combined reinforcement are met, is it possible to artificially control the value of B in order to avoid combined reinforcement? Surely someone understands this?
Logically, it should be possible to control the B value.
It seems like this approach is borderline questionable: single-hole control of B works, but combined reinforcement doesn’t. In such a situation, I backed down and simply chose to strengthen the connection using the combined reinforcement method instead
In cases where the equipment is under high pressure or operates in harsh conditions, combined reinforcement is the preferred approach.
I often manually control the B value to avoid combined reinforcement while also reducing the pipe spacing. But it is also necessary to ensure that local stress concentration is avoided.