Could everyone please help check whether the inner cylinder should be pressurized during the jacket pressure testing? The software does not provide any indication
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Could the experts please take a look and determine whether the inner tube is qualified or not? Will the jacket water pressure have an impact on the inner cylinder?
The allowable external pressure for the inner cylinder is 1.13, while the water pressure in the jacket must be at least 1.25
The jacket water pressure is already 1.37, which corresponds to a negative pressure of 1.37 in the inner cylinder
Jacket test pressure: 1.37 MPa; allowable pressure for inner cylinder: 1.13 MPa； A pressure of 0.24 MPa must be applied during the hydrostatic test.
The allowable external pressure for the cylinder is 1.1321; the difference between this value and the test pressure applied to the jacket represents the pressure difference between the inside and outside at the pressure of the water in the jacket
The external pressure calculation is satisfactory; the inner cylinder does not require pressurization. Because the allowable external pressure you calculated was determined under conditions of 190°C, while pressure testing is generally carried out at room temperature; calculations show that the required external pressure for the inner cylinder at this temperature is 1.5 MPa.
The inner tube is thick enough; no need for more； If necessary, the software will indicate what pressure level you should charge to
Can the jacket hydrotest pressure be directly compared with the allowable external pressure of the inner cylinder? One is under test conditions, and the other is under operating conditions – is temperature unrelated to the allowable external pressure? If pressure holding is required, the software will also give a prompt.
Sometimes this happens even at temperatures below 150 degrees, but the software does not indicate that pressure is being applied; it’s a bit confusing
Yes, a warning will be given to pressurize when the difference is large; it seems that in many cases where the difference isn’t very significant, there’s no need to pressurize. Is there a critical value?