safety valve pressure
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Can anyone tell me the relationship between the design pressure of the container, the maximum working pressure, the discharge pressure of the safety valve, and the opening pressure of the safety valve?
from high to low: Discharge pressure, design pressure, cracking pressure, maximum working pressure.
From low to high they are: Maximum working pressure, safety valve opening pressure, design pressure, safety valve discharge pressure.
Maximum working pressure＜Safety valve opening pressure≤Design pressure＜Safety valve discharge pressure
First of all, it is clear that the design pressure is greater than or equal to the maximum working pressure； The opening pressure of the safety valve is higher than the design pressure (abnormal operation), and the discharge pressure of the safety valve should be the minimum. Some are discharged directly into the atmosphere or into the system. In summary, it is not difficult to see that the order is:: Safety valve opening pressure, design pressure, maximum working pressure, safety valve discharge pressure.
Maximum working pressure ≤ design pressure safety valve opening pressure ≤ (1.1-1.05) Maximum working pressure design pressure ≥ safety valve opening pressure From high to low: safety valve discharge pressure, design pressure, opening pressure, maximum working pressure.
The same point of view as on the third floor, that is, from low to high:: Maximum working pressure, safety valve opening pressure, design pressure, safety valve discharge pressure. The basis is Appendix B of GB150-98 "Steel Pressure Vessels".
There are clear regulations on page 22 of the basic regulations for the design of steel chemical vessels HG20580-1998.: Test pressure>Discharge pressure>Design pressure>Opening pressure>Maximum working pressure. Taking into account the lag in the start-up action of the safety valve disc, the container cannot release pressure immediately. The design pressure of the container is generally not lower than the opening pressure of the safety valve, and the opening pressure is 1.05~1.10 times the working pressure.
Safety valve opening pressure, design pressure, maximum working pressure, safety valve discharge pressure
Maximum working pressure＜Safety valve opening pressure≤Design pressure＜Safety valve discharge pressure