Originally Posted by shaftsinkerawc
The liquid tanks are a large thermos, when filling liquid oxygen at the plant O2 enters the tank with extra and I mean a lot of extra oxygen being bled off to atmosphere the bleed off cools the tank and contents to sub zero temperatures.
Now that the tank has been filled, the contents should be put to work imediately or as soon as possible, as you use the oxygen your drawing gas off as a vapor which in turn is used to keep the inner contents cooled down.
Liquid oxygen is not something you order then expect the tank to remain full for a year, if not used then as the contents warm up the tanks are designed to automatically bleed off. Think of it as a self contained refrigeration system, the more product you use the colder the contents.
Definitely not meant to be used indoors, those that use a lot of oxygen store these cylinders outside with plumbing to the work stations.
Piston has access to larger liquid tanks where the truck comes to replenish the product, same as the hospitals would have a large tank somewhere on the property. The larger liquid tanks actually have visible condensers.
If your ordering a liquid oxygen they're filled to order.
If your doing a lot of cutting you have another option, you can order in a cylinder cluster. also with a cluster there is no need to be contually drawing gas from the cylinders to keep the contents cooled down.
With oxygen the more you use the cheaper it gets.
On both set ups a regular cutting torch regulator works, I used propane for my fuel with a Harris torch made specially for natural and propane gas.