Liquid N2

[trains are bad]

At room temp, at what pressure is N2 liquid?

[ToTalChaos]

Some one with more practical knowledge may update this, but we use it everday for oilfield uses, our storage vessals are kept at about 25-30 psi, at cryogenic temps....our pumps then convert it to gas and pump it down a well, they do it at a rate of 1000 to 150,000 SCFM at up to 10,000 psi....

( I'm working with our engineers to makes something a little smaller..)

[ToTalChaos]

After asking around and such, I found a non answer to your question....not likely at room temp with current knowledge...the pressure would be enormous
(several million Bar? if thats even a possibility)

[Redkey]

this is a good question

I go through a couple of 160 liter bottles of LN2 every month. For years now I have wondered the same thing. I've even tried to measure it before... not an easy task when the temperature differential between the LN2 and the steel container is about -260F. The stuff boils like crazy making it nearly impossible to fill the container without the whole thing sitting at near cryogrenic temperatures. I've got the pressure up to 1000 psi, although I'm sure it will go higher.

LN2 expands about 700 times going from a liquid to a gas. If the liquid is at atmospheric pressure (14 psi) then the gas should be at 9,800 psi. I have no idea if this is true or not... this is a very simple way of looking at it.

I've got some 7500 psi ball valves around here... I might have to try it again.

[ZapTheMad]

I don't think the risks of playing with liquid nitro are worth the consequences if something goes wrong. It wouldn't take much to freeze a finger solid. If you really want nitro, just get it in compressed gas form. It's more or less the same thing as HPA and much safer.

I'm not sure on this, but I believe you need some kind of special HAZMAT permit to handle liquid nitrgon.

[Redkey]

Ln2

No hazmat required.

Freezing a finger with LN2 is possible. Although it is very painful and I doubt anyone could hold their finger in LN2 for more than a couple of seconds. It actually kind of interesting to play with. Because the temperature difference between your skin and the LN2 is so great the stuff boils when it comes in contact with your skin. This creates a vapor barrior and actually shields your skin from any damage for a couple of seconds. The soon as your skin starts to cool the vapor barrior begins to shrink. After a couple seconds the outer layer of your skin freezes and the serious damage occurs.