Why is the thickness of the flange cover so large?
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This post was last edited by YeTangZhangShang on May 29, 2019, at 09:54. There’s a piece of equipment that uses DN400 pipes; its upper head is a flat cover, i.e., a flanged cover. After checking the standards, I found that the thickness should be 32. The maximum thickness of Q235B is 30; how can this situation occur? The key point is that there are also holes in this flat cover; how should hole reinforcement be calculated? ———————————————————— Also, if this device is fitted with legs, how is such a non-standard leg calculated?
Replace material with Q345R or 16Mn forgings
Thickness of material is limited! 20 forging can also be used!
Higher-grade materials can be used, such as Q345, or forgings can be used in its place. Regarding the legs, this can be calculated by determining the total weight, finding various parameters of the steel sections, and then identifying the required stress for the corresponding material in order to carry out the calculations.
It is necessary to conduct calculations to confirm compliance; refer to the original design documents
Isn’t that quite normal? Yesterday, a flat cover was used; it’s much thicker than a standard flanged cover. It wasn’t possible to distribute some of that thickness to the openings, so a forged pipe was created instead.