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Flame arresters

A flame arrester is a safety device used in industrial processes to prevent the propagation of flames and explosions in pipelines or vessels containing flammable gases, liquids, or vapours


Wherever flammable liquids, gases or vapours are transported and stored, flame arresters should be used. This will minimise the risk when the explosive media are ignited and protect the factory, installation and, most importantly, people.

It is recommended that all equipment that has a permanent source of ignition should be equipped with flame arresters. Devastation and destruction is usually the image that appears after deflagration or detonation in installations where potentially dangerous explosive gases or vapours are transported. As soon as the gas is ignited in a shutdown, the flame starts to move through the pipeline at an incredible speed, resulting in destructive force.

Operating principle of the flame arrester

flame arrester working principe

Explosion suppression by the flame arrester

Flame arresters are passive systems to prevent deflagration and detonation and do not have any moving parts. The basis of the construction of these products is a properly selected grid which consists two stain-less steel strips, which thanks to its properties guarantees the operation of the device.

Depending on the application, we offer flame arresters for a special product or application. It is possible to combine: flame arrester with a breathing valve or only vacuum valve or pressure relief valves.

Why do we use flame arresters?

Flame arresters are used to prevent the propagation of flames and explosions in industrial processes where flammable gases, liquids or vapours are present. They are designed to act as barriers to the propagation of flame, while allowing the flow of material through the pipeline or vessel.

Flame arresters are typically used in situations where there is a risk of flammable vapours or gases igniting due to sparks, electrical discharges, hot surfaces or other sources of ignition. They work by extinguishing flames before they can reach other parts of the process or equipment, preventing explosions and protecting people and the environment from harm.

Flame arresters come in various forms and designs. They are typically installed in pipelines, tanks, vent lines, and other equipment where flammable materials are present. Regular maintenance and inspection of flame arresters is important to ensure their continued effectiveness in preventing explosions and fires.

How do flame arresters work?

Flame arresters work by interrupting the propagation of flames through a pipeline or vessel containing flammable gases, liquids, or vapours. When a flame front encounters a flame arrester, it is extinguished by a combination of several mechanisms.

flame arresters use a mesh or screen to interrupt the flame front. The mesh or screen is designed to have small openings that allow the flow of material through the pipeline or vessel, but which are too small to allow the flame to propagate.

There are different types of flame arresters, such as deflagration and detonation flame arresters. Deflagration flame arresters are designed to stop the propagation of slow-moving flames, while detonation flame arresters are designed to stop the propagation of high-speed flame fronts.

Flame arrester technical parameters:

• size range from DN 6 to DN 600
• maximum operating temperature up to 250°C
• certified for high operating pressures

• types of deflagration, detonation short-time burning and endurance burning
• liquid - used to protect storage tanks against vapour explosion, mounted on the liquid detonation flame arrester and emptying the tank (foot valve)
• end of line flame arrester/ventilation hood - vent/air valve to ensure undisturbed air flow to the tank and gas/vapors outflow to the atmosphere while protecting the tank from flashback. The protection is possible thanks to the use of a special explosion-proof element with slots adjusted to the explosion group of the medium stored in the tank.