Choosing the Right Flame Arrestor: The Impact of Combustion Speed

A flame arrestor is an important safety device designed to prevent combustion or explosions caused by flammable gases or vapors. It acts as a barrier between the flammable substance and the outside environment, controlling the flow of gas and extinguishing any flames that may occur. Flame arrestors are widely used in various industries, such as the oil and gas, chemical, and pharmaceutical industries, to ensure the safe operation of equipment and prevent catastrophic accidents.

Burning Rate and Flame Arrestor Selection

An important factor to consider when selecting a flame arrestor is the burning rate. Burning rate, also known as flame spread, refers to the speed at which a flame spreads within a flammable substance. The higher the burning rate, the faster the flame spreads, and vice versa. The type of flame arrestor required depends directly on the burning rate of the flammable substance.

There are different types of flame arrestors designed to effectively handle different burning rates.

Deflagration Arrestors

Deflagration arrestors, for example, are suitable for lower burning rates, while detonation arrestors are designed for higher velocities. Deflagration is a slow, controlled flame that propagates at a speed of less than 100 m/s. This type of flame is commonly found in industrial processes. A deflagration flame arrestor works by cooling and extinguishing the flame as it flows through the device. This type of flame arrestor is often used in applications with lower burning rates, such as storage tanks, pipelines, and vents.

Detonation Arrestors

Detonation, on the other hand, is an explosive and uncontrolled flame that propagates at high velocities of over 1000 m/s. This type of flame is more dangerous and can cause greater damage if left uncontained. Detonation arrestors are more robustly constructed to withstand the high pressures and temperatures associated with this type of flame. They are typically used in situations where rapid combustion rates are expected, such as in pressure relief lines and gas burners.

Conclusion

In summary, the combustion rate of a flammable substance plays a crucial role in determining the type of flame arrestor required. To select the appropriate flame arrestor for a specific application, it is important to understand the nature of the substance and its potential burning rate.

 

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Cashco’s flame arrestors are engineered to stop the propagation of flames in gas piping systems, helping protect equipment, personnel, and facilities. For more information about Cashco's arrestors, view all models here .

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