Nitrogen tank pressure testing issues
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The flange for the nitrogen storage tank weighs 63 kg, with a test pressure of 75 kg. Will a flange selected in this way meet the requirements?
What is the operating pressure, and what is the design pressure?
Proper design should involve selecting the pressure class of the pipe flanges in accordance with the equipment’s pressure, temperature, and material, as well as relevant flange standards; such a selection will ensure that the flanges meet the requirements for hydraulic testing of the equipment.
It is impossible to determine based on just these two pieces of data
Determined in accordance with the container design parameters and by referring to flange standards.
Yes, the strength test involves short-term loading, and for the flange hydrostatic test, the pressure should not exceed 1.5 times the maximum allowable operating pressure at normal temperature; for details, refer to HG/T20592 P87.
I completely agree with you. When selecting the pressure rating for a pipe flange, it is necessary to ensure that the maximum allowable operating pressure of the flange at the design temperature is greater than or equal to the design pressure of the container. For safety reasons, it is generally sufficient to choose a flange whose maximum allowable operating pressure at the design temperature is higher than the container’s design pressure.