"harry" wrote in message
...
In the hospital where I worked we had liquid oxygen. It held about
three tons of LOXWe even needed a heat exchanger on that to evaporate
the LOX. It was just like a big car radiator.

Aha. There is a difference

LOX is cyrogenic and usually stored at a very low pressure in an insulated but
vented vessel . Propane is stored at ambient temperature in a medium pressure
UNinsulated pressure vessel. Even tiny portable, LOX bottles have heat
exchangers built in to vaporize the liquid. Not so for propane because the tank
itself is usually sufficient to act as the heat exchanger.

Vaughn