Considerations of pressure vessel stiffness
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How should stiffness be considered for large-diameter and long cylinders? To manufacture a storage tank with dimensions of DN2800*9000, at room temperature and under a working pressure of 1.0 MPa. The designed wall thickness is 12 mm. Should stiffness be considered in the length direction? Is it necessary to add a reinforcement ring? Will a double saddle work?
Horizontal container calculations have been taken into account! Look at the calculation sheet!
The thickness you’ve calculated isn’t enough; it’s so long – two saddles probably won’t work
The length-to-diameter ratio of this device is not high; in terms of that ratio, it is not considered a long device； A double saddle is sufficient; calculate it based on a horizontal container.
The stiffness of a pressure vessel shell generally refers to the diameter direction; in the case of a horizontal hydrostatic test, it is necessary to level the bottom and use sandbags on both sides for fixation. If it is to be placed on a saddle, it is best to use a dual-saddle design; a triple-saddle design requires high standards for the foundation, otherwise it results in an unstable structure that can be harmful to the cylinder. All 1000 cubic meter DN4100 horizontal storage tanks use double saddle supports.
It needs to be calculated. The wall thickness, whether an internal reinforcement ring is needed, and the number of saddles all depend on the calculation documents.
A double saddle should work; calculations are needed
Since the length-to-diameter ratio is not high, it is advisable to use dual supports for the saddle; whether a reinforcement ring is needed depends on the results of the calculations.
Is the calculated thickness related to length? It’s not negative pressure.
Who can explain the issue regarding stiffness? It’s fine to use a thickness of 150. Stiffness, not strength.
Come to learn*. Just to be safe, it doesn’t hurt to add another layer