asecos Main catalogue 2022 - Working safely with hazardous substances

How can the fire resistance of safety cabinets be recognised and what other markings are there? The fire resistance in minutes must be stated on the front of the safety storage cabinet. The number on the sticker indicates the resistance in minutes. (e.g. 90 or 30). In addition, the following warning and prohibition symbols, among others, are also required: ››› Prohibition sign P003 „No open flame; fire, open source of ignition and smoking prohibited“ ››› Warning sign W021 „Warning of flammable substances“ What safety requirements must be met when installing safety storage cabinets for flammable liquids with various fire resistance classes? The safety demands on the quality of safety storage cabinets for flammable liquids are considered to be fulfilled if they have a fire resistance of at least 90 minutes and meet further requirements according to EN 14470-1. They can be installed in unlimited numbers. The fire resistance may be less but at least 30 minutes (type 30) if ››› only one cabinet is installed in a fire (fighting) section/utility unit (for larger sections, a maximum of one cabinet per 100 m²) or ››› an automatic fire alarm system and a recognised site fire brigade with a maximum response time of five minutes after being alerted are available for the fire (fighting) section/utility unit, or ››› an automatic fire extinguishing system is available. In general, the storage of hazardous substances in safety storage cabinets with a fire resistance of 90 minutes (state of the art) should be aimed for. What prohibitions on combined storage must be observed in safety cabinets for flammable liquids? Hazardous materials may only be stored together if there is no increase in the risks involved. This is possible, for example, as a result of the risk assessment or the limitation of quantities. In order to determine the possibilities for joint storage, the hazardous materials are divided into storage classes. This formal classification serves to control the joint storage of different hazardous materials. Flammable liquids may not be stored together in safety cabinets with: ››› Hazardous substances that may lead to the occurrence of fires (e.g. pyrophoric substances) ››› Compressed gas cylinders ››› Lithium-ion batteries It is also advisable to store mineral acids and alkalis in a separate acid or alkali safety storage cabinet in view of the risk of corrosion. Non-flammable toxic and very toxic substances must be stored separately in a lockable, chemical cabinet. Suitable products can be found in the corresponding chapter from p. 276. Please observe local legislation and regulations. 29