Flame Arrester is used for preventing of flame transmission any more when an explosion is occurred inside of the piping which is full of explosive mixed gas.
It's known as inflammability prevention equipment, reverse flame prevention equipment from old day.
It's limits so as not to be occurred extension of damage when explosion is occurred in chemical equipment or the progress of work.

In addition to, if safety equipment of this kind is installed you can prevent from big calamities occasionally.
Function of Flame Arrester is to stop of flame when it's extraordinary.
It need practically not to disturb flowage of gas of piping inside in common operation condition.

There is several methods of principle to prevent extension of flame method by stick of water, interception of a pipe conduit by detection of flame or scattering of inactivity material but there's some practical problems as easiness of usage, reliance, a response, economical efficiency. Also, there are water seals, packed beds, velocity-type arresting device.