Question for assistance: Can the flange cover of the stiffened plate be used in hydrostatic testing with this design?
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This post was last edited by Taurus_Y9lDk on 2020-8-7 08:49. The hydrostatic test pressure is 17.5 MPa; the material used is Q345R, and the flanges are of type WN600-900 RJ, in accordance with HG/T20615-2009 standards. Could there be problems with pressing such a blind flange cover? I have now replaced the flange cover reinforcement plate structure. SW6 has done the calculations, as shown in the figure below: Please help to take a look and learn from it together. Thank you!
Please do a rough calculation using SW6-2011. I just entered your data and ran a simple calculation, and the result was not satisfactory.
With such high pressure, it is necessary to be cautious; select the flange cover in accordance with flange standards. Slight deformation of this structure will result in complete failure of sealing, and it may also affect the sealing surface of the flange.
It won’t work; with such high pressure, the thickness is too small.
I think it’s sufficient to select flange covers according to the standards; the risk in this case is too high, the pressure is too great, and the thickness is not adequate.
It seems that for hydrostatic testing, many manufacturers rely on experience; in fact, not all such tests will be successful. Even if the allowable stress is increased, ribs can indeed enhance strength, but irregular shapes are difficult to include in calculations. There is only one type of 150: one with a circular center and ribs radiating outward from it, and this type can be calculated
The previous diagram has been modified; could you take a look and help out? Thanks!
With such high pressure and large-sized custom flange covers, it is recommended to use finite element analysis to ensure safety
Just make it into a head – it’s lightweight and easy to process.
When made into a spherical head, the plate remains very thin.
Regarding the DN250 flange cover, when a pressure of 100 kilograms is applied, how should it be reinforced to meet safety requirements?