Requirements for explosion-hazardous areas

Requirements for explosion-hazardous areas are determined by the level of explosion risk in accordance with the area classification. The lower the number, the more specific the requirements must be. The requirements apply to tools, technical equipment and telephones that may be used in the area. Electrical connections and penetrations in ATEX areas are also of particular importance.

Electrical connections must generally be protected by special enclosures marked in accordance with the hazardous area classification. In addition, cable entries where cables enter from hazardous areas into less hazardous areas or vice versa must be designed in accordance with specific safety criteria. All entries must ensure that gases or dust cannot spread to safe areas and potentially cause explosions there.

In addition to tools and equipment, personnel working in potentially explosive environments must wear personal protective equipment that complies with the ATEX standard. This may include, for example, footwear, work clothing and helmets designed for use in explosive environments. This equipment is designed to prevent the build-up of static electricity and minimise the formation of sparks.

Organisations operating in hazardous areas must also ensure that all personnel working in the area receive appropriate training on ATEX requirements, the specific risks in the area and emergency procedures. This training ensures that all employees understand the seriousness of the explosion hazard and know how to act safely.

In addition, the workplace must be properly marked with warning and information signs clearly indicating areas at risk of explosion and the necessary precautions. Access to areas at risk of explosion is often restricted to authorised personnel only, and this requirement must also be clearly indicated at the entrances and boundaries of the area.

Continuous supervision and monitoring, including systematic inspections and maintenance, are essential for managing explosion hazards. Only regular monitoring and proper maintenance of equipment can ensure the safe operation of potentially explosive atmospheres.

The purpose of effective risk assessment is primarily to prevent explosions and to minimise the potential consequences should they occur. Risk assessment is based on good engineering practice and should be applied consistently and systematically in all areas at risk of explosion.