If the tank is kept full, there is
less space
inside it to collect condensation, which can help decrease this effect, but it also depends on the
humidity where the gas is stored.
The assembly is not airtight enough and vapor tight enough from the
inside to work in colder climates — unless the interior relative
humidity is kept low during the coldest two months —
less than 30 percent in climate zone 5 and
less than 20 percent in climate zone 6 and in colder places forgeddaboudit.