Design pressure and test pressure of pressure vessels
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I’m not familiar with static equipment; I’d like to ask everyone for advice. What does the design pressure indicated in the diagram mean: HYDROSTATIC 150/-50mm H2O? Also, for atmospheric-pressure vessels, is the design pressure taken as the pressure at the highest liquid level? Should the design pressure be taken as 1.25 times the design pressure? Thank you!!!!!
HYDROSTATIC 150/-50mm H2O refers to the pressure of a liquid column, which can be converted into Pa. It is a container operating at normal pressure, and its design follows the standard NB/T47003.1-2009, which includes provisions for hydrostatic testing
I’ve found the standard, thanks to humanrzm. However, mine is made of fiberglass, so it’s not suitable; I’m looking for a standard for fiberglass containers. Regarding pressure, I refer to NB/T47003.1-2009; the defined design pressure is the highest pressure at the top of the container. However, I have always understood the design pressure to be the pressure at the bottom of the container.
For this device, it is sufficient to fill it with water to test for leaks.
For atmospheric-pressure containers, we generally use water filling tests and kerosene penetration tests.