What is the difference between storage in liquid and gaseous form?
When stored in gaseous form, the desired mixture can be used directly provided that the temperature of the mixture does not fall below the liquefaction point. When stored in liquid form, the individual components are partially separated in the cylinder/tank and must be homogenised again (= evenly mixed) first. The advantage of liquid storage is that a much larger volume of gas can be stored in the cylinders/tanks than with storage in gas form.
How is the gas mixture handled?
The gaseous mixture can be used directly for filling the GIS or GILs. A liquefied mixture must first be homogenised using a service cart before use.