ATEX STANDARD

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Definition of explosive atmospheres (ATEX) :
Explosive atmospheres are areas where flammable substances, such as gases, vapors or dust, are suspended. In the event of a spark or electric discharge, these mixtures may ignite and cause an explosion.

ATEX zone regulations :
Two European directives govern work in these areas:
Directive 1999/92/EC establishes minimum requirements for worker safety.
Directive 94/9/EC concerns protective devices and systems.
The main objective is to prevent the material used from triggering a spark.

Requirements for PPE in ATEX zones :
Personal protective equipment (PPE) used in ATEX zones must:
Be made of anti-static fabric to dissipate electrostatic charges.
Be in contact with the skin, directly or via connectors, to guarantee effective dissipation.
Ensure a ground connection with a resistance less than 108 Ω to protect against electrostatic discharge.
Be made of flame retardant fabric, in accordance with EN ISO 14116 or EN ISO 11612, to provide thermal protection in the event of an explosion.
In summary, PPE used in ATEX zones must not only dissipate electrostatic charges, but also protect against thermal risks linked to explosions.