Is the hydrostatic pressure of the liquid column taken into account when checking the external pressure on the inner cylinder during the hydraulic test of a jacketed vessel?
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The inner cylinder is at atmospheric pressure, the jacket is at a positive pressure of 0.4 MPa, the water pressure is 0.5 MPa, and the jacket height is 3 m. The inner cylinder is calculated based on the jacket design pressure, while the verification is carried out using the jacket hydrostatic test pressure. Assuming a water pressure of 0.5 MPa, the top of the inner cylinder experiences -0.5 MPa, while the bottom experiences -0.53 MPa. (It seems that SW6 did not take into account the static pressure of the liquid column during the calculations.) Question: Is the external pressure applied to the inner cylinder during the hydrostatic test of a jacketed vessel taken into account when considering the static pressure of the liquid column?
During verification, it is checked whether the inner cylinder can maintain pressure, with the pressure retention value being the maximum allowable external pressure during the hydrostatic test minus the test pressure. If our maximum allowable external pressure happens to be the test pressure, then wouldn’t there be a risk when the hydrostatic pressure of the liquid column is added?
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