The pressure is very low; how should the thickness of flanges with a larger diameter be determined?
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For atmospheric pressure flanges, how is the thickness determined? The pressure is even lower; for example, with a pressure of 0.05 MPa and a nominal diameter of 4 meters, how should the thickness of the flat flange be determined in such a case?
Is it just a vertical tank or an atmospheric tower?
Are the flange calculations different for the two?
Which standard states this? Want to learn * a bit
It can be calculated using SW6 components – flat cover
There is a difference: in the case of vertical tanks at atmospheric pressure, standard flanges should be used, as long as the maximum allowable operating pressure at the design temperature is satisfied. However, in the case of a tower, loads such as wind bending moment and seismic bending moment must be taken into account.
What about below atmospheric pressure? Can standard flanges only be selected based on pressure rating? As you mentioned, tower structures are subjected to wind bending moments and seismic bending moments; if flanges are used for connection, are there any calculation methods?
Negative pressure? In the case of negative pressure, sealing performance is usually a consideration; however, what determines sealing performance are factors such as the design of the sealing surfaces and the material of the gaskets. Flanges, relative to the cylinder, are rigid components. Additionally, according to GB/T 150.3, external-pressure flanges can be calculated based on their internal threads. For tower-type equipment, the equivalent design pressure can be determined by calculating moments, axial forces, etc., in accordance with tower standards
For flanges of atmospheric-pressure equipment, SW6 is used to calculate the thickness of the flange under preload control. For towers, equivalent pressure needs to be taken into account, that is, the effects of wind and earthquakes must be considered.