What are the precautions for filling a newly built LNG tank with LNG for the first time?
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What are the precautions for filling a newly built LNG tank with LNG for the first time?
First, air must be driven out using nitrogen, followed by pre-cooling with LNG, and finally filling
The nitrogen vent gas is pre-cooled, and the instrument valve generally needs to be closed at the beginning of liquid addition; the instrument can be used only after more than a quarter of the liquid has been added
What is the purpose of doing this? During the pre-cooling process, it is necessary to monitor the temperature and pressure changes in the storage tank; so how can pre-cooling be carried out when it needs to be stopped?
Oh, I was careless and didn’t consider the thermometer; when liquid is added, it usually vaporizes rapidly, and the resulting pulses can affect pressure and differential pressure instruments.
There is no need to turn off the pressure gauge; when the pressure rises rapidly, simply release the air
Be careful not to move the cold tank too quickly
Use cold nitrogen first, then liquid nitrogen; be careful with the speed