Pressure test value
Thread Content
GB150 specifies a pressure test pressure of 1.25P for water and 1.15P for air. The relevant standards also set the pressure at 1.25P for water and 1.15P for air. When testing vertical containers in a horizontal position, should the pressure be 1.25P plus the pressure due to the liquid level, or should it be 1.25(P + pressure due to liquid level)?
The value of 1.25P + liquid level pressure should be used; when the static pressure due to the liquid level is low, it can be ignored
The pressure of 1.25P + liquid level pressure is used, as it is necessary to consider the most hazardous scenario. When performing a hydrostatic test on a vertical container, the pressure is increased to 1.25P; if the static pressure of the liquid column cannot be ignored, then the pressure at the bottom of the container becomes 1.25P + liquid level pressure, which represents the highest pressure inside the container. For practical operational convenience, horizontal testing is often used instead of vertical testing after the equipment is manufactured; therefore, the testing pressure must be high enough to cover the most dangerous scenarios, that is, it must be at least equal to 1.25P plus the liquid level pressure at the bottom of the container when using vertical testing.
It should be 1.25P+ level pressure
The test pressure is 1.25 times the design pressure, as determined by the gauge reading at the top of the container. When the pressure at the top of the container reaches 1.25P, the pressure at the bottom of the container is naturally 1.25P plus the liquid level pressure.