Some pure compressed gases are chemically unstable. If exposed to slight temperature or pressure increases, or mechanical shock, they can readily undergo certain types of chemical reactions such as polymerization or decomposition. These reactions may be violent, resulting in fire or explosion.

It may be hard to believe, but oxygen can also be dangerous. The dangers are fire and explosion. Oxygen behaves differently to air, compressed air, nitrogen and other inert gases. Pure oxygen, at high pressure, such as from a cylinder, can react violently with common materials such as oil and grease.

Store, handle and use compressed gas cylinders securely fastened in place in the upright position. Never roll, drag, or drop cylinders or permit them to strike each other. Move cylinders in handcarts or other devices designed for moving cylinders.

Common compressed gases are: propane, nitrogen, chlorine, helium, and oxygen.

Size/Name

MIG/TIG Welding Gas Tank Specifications (Argon/MIG Blends)

Common cylinder sizes

A typical cylinder, about 5′ tall, can hold about 230 cubic feet of nitrogen gas, if it is filled to the maximum operating pressure – which can be in the range of 2,200 psi, that is to say, if it is full. The cylinder will have the maximum allowable pressure stamped on the side near the valve.

2200-2400 PSI

You can see if a cylinder is empty by checking the cylinder pressure registered at the gauge* on primary regulator. colour coded), the cylinder is empty • change it for a full cylinder of the same type.

Nitrogen

In addition, when delivered in Dewar flasks, liquid nitrogen costs about $2 per gallon but when delivered in bulk storage tanks, it costs about $0.50 per gallon.

Liquid Nitrogen is created through a multistage processes which pulls the air around us, separates the different elements present in the air (largely nitrogen, oxygen, argon, water vapor, and carbon dioxide), and then converts nitrogen gas to its liquid form by cooling it below its boiling point.

How did we come up with these amounts? UAN28 weighs 10.6 pounds per gallon, so 10.6 pounds X 0.28 = 2.9 pounds.

There are a couple main companies that supply gas (AirGas and Praxir). You need to ask for “food grade nitrogen”. The cost is typically about $40-60 for a 60 pound tank. You have the option of buying a tank then taking it to one of those companies to fill, or if you use one of their tanks you pay a rental fee.

This is necessary not only for safety when the cylinder is under pressure, but also to prevent the corrosion and contamination resulting from diffusion of air and moisture into the cylinder after it has been emptied.

Somewhere between that and 10%. Try not to go much below that. Tanks generally only get filled around 80%, especially in hot weather. Check with the company.

How long will a 20 lb propane tank last at 50000 BTU? 432,000/50,000 = 8.64 hours. At a practical level, eight hours depending on ambient temperature and the pressure required at the regulator. If it is cold out, the flame toward end of the tank might be a bit fluttery by the drop in pressure.

55 lbs

In warmer months a tank is lasting a month. The last refill was 3 weeks, I expect from here out it will be 4-5 weeks each time.

about 37 pounds

about 17 pounds