At the corresponding design temperature, the pressure used to determine the thickness of the pressure component of the inner container, including the static pressure of the liquid column. Because the inner container of the sub-tank is usually larger in volume and its liquid level is higher, it should be judged whether the inner container needs to be designed in sections based on the value of the design pressure. The calculated pressure of the upper and lower cylinders is determined by The design pressure is determined by the static pressure of the liquid column that this section of the cylinder bears. On the premise that the segment height meets the design thickness of the upper cylinder, the height of the lower cylinder should be an integer multiple of the steel plate width.



  Sub-tank refers to a storage tank in which multiple (three or more) inner containers (sub-tanks) containing medium are connected in parallel and placed in an outer container (mother tank) filled with insulating materials in a certain arrangement. It is generally designed and constructed for large-volume, pressurized storage.



Work pressure:



The high gauge pressure that may be reached at the top of the inner container under normal working conditions. Because the pressure of the liquid produced by the natural gas liquefaction plant is usually between 0.3 MPa and 0.4 MPa, the working pressure of the inner container of the LNG sub-tank is generally within this range. Of course, when the user makes a clear regulation of work pressure, he will follow the user's requirements.