Regarding the classification of water storage tanks
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A water storage tank, with water as the medium, operating at a pressure of 1.6 MPa and at normal temperature; it does not fall into any category according to the pressure vessel regulations. However, if the water storage tank is not filled to capacity and there is a gas space, and the product of the volume of that gas space and the operating pressure is definitely greater than or equal to 2.5 MPa·L, then it should fall into this category. Right?
This post was last edited by SDHZZXM on 2016-8-11 08:10. Yes. However, according to TSG 21-2016 \"Regulations on Safety Inspection of Fixed Pressure Vessels\", it is not the case...
A pressure vessel is a sealed device used to contain gases or liquids and withstand certain pressures; it is defined as such for gases and liquefied gases whose maximum operating pressure is 0.1 MPa (gauge pressure) or higher, and for liquids whose maximum operating temperature is equal to or higher than their standard boiling point. In terms of the state of the medium, as long as water is in a liquid state, no matter how high the pressure, it does not constitute a pressure vessel. In terms of physical properties, water is an incompressible fluid; its volume changes very little when pressure increases, which significantly reduces its hazard compared to gases. Therefore, containers using liquid water as a medium are unlikely to be classified as pressure vessels.
When water is introduced, a gas space forms above; compressed air is used – doesn’t this constitute a pressure vessel?
Does this belong to pressure vessels? What was said in the end?
Avent you not going to install an exhaust? If there is no exhaust device, it could certainly be a container. You’ve mixed up cause and effect
There are two scenarios in this case: 1) The medium is a liquid, but its operating temperature is above its boiling point; in such cases, there is no need to consider the gas phase space, and it falls under the category of containers mentioned earlier. 2) The medium is a liquid, but its operating temperature is below its boiling point; in this case, it is necessary to take into account the gas phase space. That’s why storage tanks generally have a filling factor.