The Explosive Triangle:

There is an explosive “fire triangle”: the Fuel, the Oxygen and the Ignition Source (the so called spark). The three elements enclosed in the “fire triangle” are always required, to support the ignition. This articles attempts to throw lights on explosion proof enclosures.

The most important volume ratio of the fuel to the oxygen need to be limited between the fuel’s explosive usual limits and the ignition source, which will discharge the required energy, to set fire to the explosive fusion. Removing three elements, you will be able to eliminate the possible explosion hazard.

Eliminating the Ignition Sources or Hot Gases:

The general manner to eliminate all the ignition sources from the possible dangerous location is to employ explosion proof enclosures. An enclosure that is certified international as explosion proof for a possible hazard, must very strong, to withstand all the internal pressure that might build up and could bring an explosion.

An explosion proof enclosure will need to be made properly, to emit all the hot gases resulting after the procedure in a way that, the arrangement would be cooled under the dangerous ignition temperature, in case there is a dangerous gas in the system.

What are Explosion Proof Enclosures Made of?

All the explosive proof enclosures are generated from some cast aluminum or from some heavy cast steel. Their maina application is to cooling all the resulting gases the projected enclosures will need to have some large flanges that will need to be grounded to a finish and a good tolerance.

The explosion proof enclosures along with the threaded covers would produce similar effect by the virtue of the long and narrow path that is through the threads. Once the hot gases from the possible internal explosion will go through all these long and narrow tubes, these things will give up all the heat to the actual metal and the pressure is much reduced.

Things to Remember:

Don’t miss to torque the all cover bolts at the suggested value. Also, do not forget that the flange surfaces have to be protected from the scratch every time.

The inappropriate torque or the damaged surfaces would facilitate all the hot resulted gases to flee and even ignite, if you are managing a very explosive atmosphere outside the explosion proof enclosures.