Liquefied natural gas issues?
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Liquefied natural gas is formed when natural gas is compressed and cooled to its boiling point of -161.5°C, turning into a liquid. It is usually stored in cryogenic tanks at around -161.5 degrees Celsius and 0.1 MPa pressure. In other words, liquefied natural gas must be stored in a double-walled tank, with a vacuum in the interlayer and insulation material filled inside. I heard that liquefied natural gas can also be stored in single-layer tanks; I’m not sure if that’s true or not ； I’ve also heard that liquefied natural gas can be stored at atmospheric pressure, which must require a very thick insulation layer. Does any fellow sailor know, and could they explain it to me? Thank you!
Looking forward to experts summarizing it...
There are mainly two types of insulation for liquefied natural gas: one is perlite, and the other is a composite of glass fiber paper and aluminum foil. Small storage tanks generally have their interlayers evacuated, while large storage tanks use perlite in their interlayers; these interlayers are large in size and are sealed under positive pressure with dry nitrogen.