Pressure vessel refers to a closed device that contains gas or liquid and carries a certain pressure.
Its scope is specified as gas with a maximum working pressure greater than or equal to 0.1 MPa (gauge pressure),
liquefied gas, and liquid with a maximum operating temperature greater than or equal to the standard boiling point.
Fixed containers and mobile containers with a volume greater than or equal to 30L and an inner diameter (non-circular section refers to the maximum geometric size of the inner boundary of the section) greater than or equal to 150mm;
the nominal working pressure of the container is greater than or equal to 0.2MPa (gauge pressure), and The product of pressure and volume is greater than or equal to 1.0MPa•L, gas, liquefied gas, and liquid cylinder with standard boiling point equal to or lower than 60℃
One is that the working pressure is greater than (PW) ≥ 0.1Mpa (excluding hydrostatic pressure).
Second, the volume is greater than 30L.
The third is that the maximum temperature of the contained medium is greater than or equal to the standard boiling point.
Those that are not airtight cannot be called pressure vessels. Cold water tank, ice water tank, mash equipment, boiling pot, filter tank. These are not airtight containers.
So they cannot be regarded as pressure fusers. Although the boiling point of the boiling pot is about 100°C, it is not a pressure vessel because it is not a closed container.
It cannot be regarded as a pressure vessel just because the pressure of the fermentation tank exceeds 0.1Mpa.
Although the working pressure of the fermentation tank exceeds 0.1Mpa (that is, the normal atmospheric pressure);
but the working pressure is generally around 0.13Mpa, which belongs to the low pressure category.
Although the beer fermentation tank is closed during use, the main function of the fermentation tank is the fermentation of liquid wort and the storage of liquid beer.
The fermentation temperature of liquid wort is generally lower than 22°C, and the storage temperature of liquid beer is low temperature storage (the storage temperature is less than 4°C), and the storage temperature is lower than the standard boiling point.
Fermentation tanks cannot meet all the above three conditions, so the fermentation industry is not a pressure vessel.