Why does the nitrogen regulating valve in the low-pressure LNG tank need to be opened when the flash steam pressure is less than 1.5KPa?
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Why does the nitrogen regulating valve in the low-pressure LNG tank need to be opened when the flash steam pressure is less than 1.5KPa, and closed when the pressure is higher than this?
Above 1.5MPa, shut down to prevent gas from escaping into the nitrogen system
There must be a certain pressure inside the tank! To prevent the tank from deforming due to low pressure during loading, there is usually a self-operated regulating valve to control the pressure by itself!
If the 1.5Mpa tank had been used, it would have burst! ! ! There have been accidents! The pressure of the large tank is generally less than 20kpa, and the pressure of the nitrogen pipe network is about 0.5Mpa! How to channel pressure! ! ! !
It should be low pressure protection. When the pressure is low, nitrogen or natural gas can be added. If it is still low, the vacuum safety valve will work.