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ScameOnLine
4th February 2013


e-learning: "Guide to the ATEX directives"
Basic concepts for protection
in explosive atmospheres

 

What is ATEX?
"ATEX" is the acronym for "ATmosphere EXplosive", i.e., explosive atmosphere.

An explosive atmosphere is a mixture of flammable gases, vapours, mists or dusts with air, under specific atmospheric conditions in which, after ignition has occurred, combustion propagates to the flammable mixture.

In order for a potentially explosive atmosphere to form, the flammable substances must be present in a certain concentration. If the concentration is too low (lean mixture) or too high (rich mixture), no explosion occurs; instead there is just a slow combustion reaction or no reaction at all.

Thus the explosion can occur only in the presence of an ignition source and when the concentration is within the explosive range of the substances, i.e., between the lower explosive limit (LEL) and upper explosive limit (UEL). The explosive limits depend on the ambient pressure and the percentage of oxygen in the air.

 

Continue reading on:
ATEX guide by SCAME ...

 


Learn more
- Products: ATEX
- Documents: ATEX guide

 

 

Rev.15.0126      

 

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