Is it necessary to perform calculations for pipe flanges used as equipment flanges?
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This post was last edited by huanghong on 2023-2-1 08:38. For devices with small diameters, such as DN250, when seamless steel pipes are used as the cylinder body, pipe flanges specified in HG/T20592-2009 and HG/T20615-2009 are often chosen as the device flanges. Is it then necessary to perform strength calculations for these pipe flanges? In the case of image device flanges, which serve as the primary pressure-bearing elements, calculations can be omitted when they are subjected only to hydrostatic pressure. It cannot be determined; the strength calculation should be carried out in accordance with Chapter 7 of GB/T150.3. Software SW6 can be used for this.
Select according to HG/T20592; no calculation is required
In fact, using pipe flanges provides a greater margin
Personally, I think there’s no need for calculations; the stress on pipe flanges is more complex, while equipment flanges only bear hydrostatic pressure
No calculation is needed; such a small device can be regarded as a pipe itself, and under no additional load, its stress conditions are the same
If it is a flanged cover without openings, no verification is required； If there are pipes connected or holes need to be made in the flange cover, verification is required; and verification according to GB/T150 may result in failure, especially in low-pressure applications, and when metal wound gaskets are used, such verification is often constrained by the pre-tightening process.