Deflagration = Explosion propagating at subsonic velocity

Inline deflagration flame arrester prevents a flame propagation to the protected side in case of deflagration of explosive vapor-air or gas-air mixtures.

Deflagration = Explosion propagating at subsonic velocity

Inline deflagration flame arresters designed to prevent transmission of a deflagration (explosion propagating at subsonic velocity). Inline deflagration flame arresters are fitted with two pipe connections, one on each side of the flame arrester.

Ignited explosive gas mixture will propagate through the pipe in direction to e.g. storage tank. With pipe length flame speed increases. Up to a certain pipe length / pipe inside diameter ratio, the flame propagates at subsonic speed. Inline flame arrester approved for deflagration stops flame propagation at subsonic speed.

Compared to the concentric design, the eccentric design allows condensate to drain off and allows easy installation in places where the installation is close to the floor or a wall.

Inline deflagration flame arresters have a lower pressure drop than detonation flame arresters.

However, consider when installing inline deflagration flame arrester that the distance from ignition source to inline deflagration flame arrester is limited.