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What are the materials we can use for the long-term storage of 30~liters of liquid nitrogen with composition and grade, along with the thickness of the sheet and storage capacity? Can we use any composites for the same? And which is the best among all?

The nitrogen is for rocket cooling, but the device doesn't need to be a thermo-flask.

Please provide references also.

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  • $\begingroup$ The answer to the question may depend on the amount of LIN to be stored & the reason for storing it: long term or short term storage. From 2 minutes searching the web I found LIN containers being made of borosilcate glass, aluminium, stainless steel. The thickness of the material used will also depend on whether a thermo-flask device or not. This question is not specific enough. $\endgroup$
    – Fred
    Commented Jul 26, 2018 at 9:31
  • $\begingroup$ I want to store 30 lit of LIN, reason is for the cooling purpose in rockets, for long term storage. Thermo-flask device is costly and hard to manufacture so it is not feasible for our purpose. $\endgroup$
    – Vaibhav Gaur
    Commented Jul 26, 2018 at 9:49
  • $\begingroup$ Pertinent information should be added into the original question. But what sort of rockets? and is the nitrogen blown off after doing the cooling or recycled ? $\endgroup$
    – Solar Mike
    Commented Jul 26, 2018 at 10:56
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    $\begingroup$ Basically, you have two options: (1) use professionally designed and constructed storage containers, or (2) die in a very nasty accident. Don't even consider building your own device for storing liquid N2. $\endgroup$
    – alephzero
    Commented Jul 26, 2018 at 14:02
  • $\begingroup$ The thermoflask serves two purposes. First, it keeps it cold if you want it cold. You don't care about this. Second, it keeps it cold because otherwise it boils, the pressure becomes extreme, and most materials fail. This feature should be important to you. I will qualify alephzero's statement because I have friends who fit the caveat- unless you are a PE qualified to work at a rocket design company don't even consider building your own device for storing liquid N2. If you're still not convinced, spend some time watching youtube videos of rockets exploding. $\endgroup$
    – ericksonla
    Commented Jul 26, 2018 at 15:01

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If you like living, do not attempt to build your own high-pressure LN2 tank if you have never designed commercial-grade pressure vessels before. Use this.

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