CO2 Fire Suppression Systems for Firetubes

A fire can occur within a firetube when cracks appear due to metal fatigue caused by the high temperatures. This failure allows emulsion to enter the fired chamber – starting a deep seated fire that is difficult to extinguish.

ARJAE Design Solutions designs, manufactures and installs custom CO2 fire suppression systems for oil and gas fired equipment.

Why a carbon dioxide (CO2) system?

CO2 provides superior fire suppression

Carbon dioxide is a very reliable and efficient fire fighting agent. CO2 extinguishes fire by lowering the oxygen content of the space to a level where it will no longer support combustion. In addition to this smothering effect, the immediate reduction in temperature, due to the rapid expansion of the discharge, also assists to suppress the fire.

CO2 will not cause further damage to your equipment

CO2 is a colorless, odorless, electrically non-conductive, non-corrosive, inert gas – it will not damage equipment or materials, or contaminate liquids and it does not leave any residue behind to clean up. CO2 can even be used without danger in spaces housing high voltage electrical equipment.


The addition of a CO2 fire suppression system adds another level of protection to keep equipment operators and other workers safe.

Insurance savings

Many insurance companies offer a reduction in insurance premiums when CO2 fire suppression systems are in place.

How it Works

CO2 discharges into the hazard

A carbon dioxide system consists of one or more cylinders, manifolded together and connected to distribution pipes leading to the discharge nozzles. The systems are custom designed for the specific application and, upon activation, the carbon dioxide discharges by the force of its own expansion into the hazard. In some cases, more than one hazard can be protected by the same bank of cylinders.


Local application is the method used to protect a specific hazard (firetube and process equipment) within an enclosure. Nozzles are arranged to discharge carbon dioxide directly onto the hazard, to build up an inert atmosphere immediately surrounding the hazard.

How it’s activated

Automatic systems incorporate fire detectors and controls. The fire detectors are located in the hazard area, and when a fire occurs, send a signal to the control panel which releases the carbon dioxide. Automatic systems are electrically operated and always incorporate a manual override feature.

Where will the equipment and CO2 be located?

The battery of CO2 cylinders and the accompanying control equipment are usually contained on a skid and located adjacent to the process equipment. Custom configurations can be designed for unique situations. Refrigeration is not required – CO2 cylinders are stored at ambient temperatures.

Cleanup following a CO2 discharge

Carbon dioxide vaporizes completely on discharge so there is no fire suppression agent left behind to clean up.


Two standard packages are available. One for 18” and 24” firetubes and one for 30” firetubes. Each system is contained on 0.782m x 1.82m skid. Contact us for custom configurations.

For more information about CO2 Fire Suppressions Systems contact:

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Darren Semotiuk