The mixture of any fl ammable substance, for example, in the form of gas, steam, fog or dust, with the air, which after an ignition, experiences a combustion propagated to the entire unburned mixture, causes what is called “explosive atmosphere “.
Explosive atmospheres are regulated by Directive 1999/92 / EC which establishes that a regular tool is a source of ignition, so that such tools cannot be used in ATEX Zones.
This is also established by the UNE-EN 1127-2: 2014 standard, which specifi es that steel tools can never be used in Zones 0, 20 or 1, 21, 2, 22 if the atmosphere is of a gas of the IIC group, nor in Zones 1, 21, 2, 22 in atmospheres of other groups, if their normal use generates sparks (hammers, fi les, saws, etc.). Therefore, a NonSparking tool should be used.
The Non-Sparking tool is made of an alloy whose sparks will never have enough energy to generate the explosion of an explosive atmosphere, and therefore, it is completely safe.
The Directive establishes the risk areas in which explosive atmospheres can be formed in amounts that require theadoption of special precautions to protect the safety and health of the affected workers.