Subject: Liquid oxygen/nitrogen stored 120/40 psi, gaseous stored 3000 psi; why/how?

In our manufacturing plant the liquid oxygen cylinders are at 120 psi
and the liquid nitrogen at 40 psi.  Both oxygen and nitrogen in the
gaseous state are stored at 3000 psi.  How is it possible for the
gaseous medium to exist at a higher pressure than the liquid phase?

If the answer has something to do with the atomic arrangement, please
explain why the phase levels change so drastically.

Thank you for your time.

-Neil West

Re: Liquid oxygen/nitrogen stored 120/40 psi, gaseous stored 3000 psi; why/how?