Frequently Asked
Questions

Safety cabinets for flammable liquids must be equipped with supply and exhaust air connections in accordance with DIN EN 14470-1. A mandatory connection to a mechanical exhaust system is not legally required in every case – however, it is strongly recommended in operational practice. ATEX-compliant recirculating air filter systems are recognized as an accepted alternative. Safety cabinets without any ventilation must be earthed according to TRGS 510 and are subject to additional requirements. DÜPERTHAL offers regulation-compliant ventilation solutions for all scenarios and advises operators in selecting the appropriate system.

An ATEX-compliant recirculating filter system is recognised as an accepted alternative to technical exhaust that discharges to the outside under applicable European safety regulations – but is not an equivalent replacement in every application. Whether it is suitable depends on the substances stored, the filter compatibility and the level of operational monitoring in place. DÜPERTHAL offers norm-compliant ventilation components for both scenarios and advises operators on the appropriate media-specific system design.

The maximum permissible quantity of flammable liquids in a safety storage cabinet depends on the flammability category of the substance under the GHS/CLP classification system. As a general rule, a single safety storage cabinet may hold a maximum of 300 litres of flammable liquids. Individual container sizes are also regulated depending on the hazard category. Safety storage cabinets certified to DIN EN 14470-1 Type 90 are recognised as independent fire compartments, allowing storage directly in the workplace without a separate hazardous materials store. DÜPERTHAL offers norm-compliant safety storage cabinets for all quantity and requirement classes.