Is there still a nitrogen seal after the BOG system on the low-temperature propane storage tank?
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As the title suggests, a nitrogen seal is used for sealing and controlling the pressure in a atmospheric-pressure tank. And for low-temperature propane tanks, with a BOG system in place, is a nitrogen seal still necessary? How is then the nitrogen sealing amount calculated? Are there any experts who know about this?
It's needed. The function of nitrogen sealing is to reduce bulk and surface breathing, thereby minimizing environmental pollution and material consumption.
As for the amount, or what is also referred to as pressure, it needs to be determined based on the properties of the material. There are detailed explanations available on forums; you can search for them on Baidu.
The liquid nitrogen pump uses a mechanical seal with a metal bellows
The nitrogen sealing of low-temperature storage tanks serves a safety purpose; it provides this protective measure.
Nitrogen is used for inflation when the tank pressure is low, as well as for purging during startup. BOG systems are used to prevent overpressure in storage tanks, and they are all necessary.
Agree with what was said above; the two have different uses. That shouldn’t be called nitrogen sealing; it should rather be called nitrogen supplementation measures, intended to prevent a drop in pressure inside the tank. Of course, it is also possible to use raw gas supplementation.