Detonation Arresters

What is a detonation arrester?

A flame arrester is a safety device whose principal purpose is to prevent a flame entering or leaving a pipe or vessel or to prevent it travelling further down a pipe.

There are different types of flame arrester, each of which is designed to handle certain conditions. It is essential that the flame arrester is correctly specified to ensure that a flame is extinguished (or properly contained) and that an explosion is prevented from propagating through the equipment.

The three main types of flame event which can occur are:

• Unconfined deflagrations
• Confined deflagrations
• Detonations

Detonation arresters are specifically designed to handle the third (and potentially most damaging) flame event above.

Detonation Arresters in Detail

The following pages explain what happens when a detonation occurs, the differences between a deflagration and a detonation arrester, and a discussion on when a detonation arrester should be selected over a deflagration arrester.

1. What is a Detonation?
2. Stable and Unstable Detonations
3. Deflagration vs Detonation Arresters
4. Selecting a Detonation Arrester

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