There is always an explosive “fire triangle”: the Fuel, the Oxygen and the Ignition Source (the so called spark). The three elements with this in the “fire triangle” are always required for supporting the fire.
An essential volume ratio of the fuel to the oxygen must be limited between the fuel’s explosive usual limits and the ignition source, which will discharge the required energy, so as to ignite the explosive mixture. You can remove all these 3 elements, and you will get rid of the possible explosion risk.
What’s the alternative to eradicate all the ignition sources from the possible hazardous location? Nothing good like an explosion proof enclosure. An enclosure that is accredited international as explosion proof for a possible risk, must quite strong, so as to resist all the inner pressure that may build up and could bring an explosion.
Design an explosion proof enclosure in such a way that it becomes easy for you to emit all the hot gases resulting after the process in a way that, the agreement will be cooled under the risky ignition temperature, in case there is a hazardous gas in the system.
These explosive proof enclosures are made either from some cast aluminum or some heavy cast steel and, so as to cool all the resulting gases the projected enclosures will require some wide flanges that will need to be grounded to an end and a very good tolerance.
The explosive proof enclosures along with the threaded covers will produce similar effect with the help of the long and narrow path that is through the threads. From the potential internal explosion the hot gases will go through all these narrow tubes, and these things would set free all the heat to the actual metal and the pressure will be much reduced.
As it is suggested, torque all the cover bolts. The flange surfaces have to to be protected from the scratch, every time. The improper damaged surfaces will make it easy for all the hot resulting gases to ignite or get them away, suppose you’re managing an explosive situation outside the explosive proof enclosure.
These explosion proof enclosures are usually present in each industry sub-domain, and the electrical materials will be labeled for the normal usage in a particular environment as it is specified in the National Electrical Code or in the IEC Standards.
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