You don’t need a license to buy nitrogen. A lot of answers here talk about industrial gas suppliers, but those generally deal with business and operate in large quantities. If you’re just an individual who wants to buy one cylinder, your best bet is to find a retail welding supply store.Click to see full answer. In this way, how much is nitrogen gas?$0.1773 per cubic meter / using 260,000 cubic meters per month. $0.18 per m3 / using 80,000 m3 per month. $0.2019 per m3 / using 40,000 m3 per month.Likewise, how much does it cost to fill a nitrogen tank? Yes you heard that right for $57 you can refill your nitrogen tank full 14+ times! that is a savings of over $433 given $34 refill cost for a 225 bottle. NOTE: this is very important, Liquid nitrogen and tanks are extremely dangerous. First the tank is a thermos of sorts. Considering this, do you need a Licence for liquid nitrogen? As it turns out, you don’t have to have any special licenses or anything to purchase the super cold liquid, but you will need a well-insulated container.Does nitrogen gas expire?Non-Reactive calibration gas is a gas mixture which could include alkane or alkene hydrocarbons (methane, propane, hexane, isobutylene, etc.), nitrogen, hydrogen, carbon monoxide, carbon dioxide, etc. The shelf life of a non-reactive gas is up to 3 years.