Everything You Need to Know About CO2 Cylinders

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CO2 gas, also known as carbon dioxide, is a colourless, odourless gas that serves multiple purposes in various industries. Regarding fire extinguishers and other safety products, CO2 has some key benefits over other gases, including the fact that it’s less likely to cause harm to people or property than other types of extinguishing agents. CO2 cylinders¬†are also much smaller than dry chemical or halon cylinders, so they take up less space and require less maintenance. Check out this guide to learn more about everything you need to know about cylinders and their uses.

The basics: what are cylinders used for?

CO2 cylinders are one of the most common and versatile tools in welding, gas cutting, and other industrial applications. They can be used for many different things, but typically they’re used for cutting metal or welding. A cylinder’s pressure is measured in pounds per square inch (psi). For example, a 30 psi cylinder would need at least 6.6 pounds-force per square inch (6.6 lb/in2) to provide sufficient pressure to open the valve when empty. Once fully pressurised, it can produce enough pressure up to 60 psi (pounds per square inch) depending on how much liquid is left inside.

How do these cylinders work?

The cylinder contains high-pressure liquid carbon dioxide that is used for various purposes. They can be used as fire extinguishers, welding tools, and in manufacturing. To use a CO2 cylinder, you must first open the valve at the bottom of it and then pour the liquid into an appropriate container. Once you have done this, close the valve and shake it up. Then, point the nozzle on top towards your target and press down on the lever until it clicks. After each release, make sure to push down on the lever again so you don’t accidentally keep spraying.

Different types of CO2 cylinders

Carbon dioxide is a colourless, odourless, and tasteless gas derived from fossil fuels. Carbon dioxide can be used for many different industrial purposes. Pressurised carbon dioxide is often used as a refrigerant, such as in-home appliances or commercial refrigeration units. The liquid form of carbon dioxide, called dry ice, freezes at -109 degrees Fahrenheit (-78 degrees Celsius). Dry ice pellets are typically used in food preservation because they sublimate (turn directly into a gas) without leaving residue behind.

How to store and transport cylinder

Cylinders should be stored in a cool, dry place away from any sources of heat or flame. They should also be secured upright so that the valves are not in contact with anything else. A cylinder should never be transported by hand. The only exception to this is if it is being carried upstairs and no other option exists. In all other cases, the CO2 cylinder should always be placed on a cart or dolly and wheeled during transport. There should also always be two people involved in handling the cylinder. If one person must handle the entire load alone, they should keep their hands on opposite ends of the tank and hold it horizontally to keep their balance while lifting or carrying it.


Cylinders are heavy and can be difficult to handle. So, before moving the cylinder, ensure it is properly secured. If you need help, have a friend hold the other end of the cylinder while you secure both ends with a strap or rope. Make sure that nobody stands in front of the cylinder while it moves.

Once you’ve got it in position, check that there isn’t any liquid on top.

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