Inline Detonation Flame Arrester: Short Time Burning

Inline Detonation Flame Arrester – Short Time Burning: Explanation

Deflagration = Explosion propagating at subsonic velocity

Detonation = Explosion propagating at supersonic velocity and characterized by a shock wave

Short Time Burning = Stabilized burning for specified time.

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

Ignited explosive gas mixture will propagate through the pipe in direction to e.g. storage tank. With pipe length the speed of flame will increases. Up to a certain pipe length / pipe inside diameter ratio, the flame propagate changes from subsonic speed (Deflagration) to supersonic speed (Detonation).

Inline detonation flame arrester approved for stabilized burning for specified time is equipped with a PT100 temperature sensor mounted on the unprotected side. As soon temperature increase and stabilized flame is detected an action such as inerting or closing of a shut-off valve to block the vapor flow is necessary. This action should start within 30 seconds (short time burning) and extinguish the flame so that the system can operate safely.

The installation position of the inline detonation flame arrester is independent of the distance to the ignition source.

Inline detonation flame arresters are also approved as inline deflagration arresters.

Range of Products / Data Sheet

Picture: Short Time Burning – Inline Detonation Flame Arrester