separation or segregation of different classes of dangerous substances, including flammable liquids. This is essential practice to prevent reaction between incompatible product types possibly having extremely severe consequences for human life and property. GHS: Globally harmonised system, is now the universal cross border guidance document that governs appropriate signage for safety boxes Structure The construction design and testing of safety cabinets are regulated by the British adoption of European standards BS EN 14470-1 (cabinets for flammable liquids) and BS EN 14470-2 (cabinets for pressurized gas cylinders). Safety cabinets usually consist of the following components: inner body, fire protection insulation, outer body, fresh air inlets and exhaust air connection points with auto shut-off, automated closing mechanisms for the doors in case of fire (not with gas cylinder cabinets), heat-triggered self-expanding seals (intumescent) on the doors and optionally, an earth connection. Safety cabinets to BS EN14470-1 for flammable substances, usually have storage shelves or pull-out drawers on which the chemicals are stored. The shelves or drawers should be load-tested and be able to support the loading specified by the manufacturer. To ensure the retention of accidental spillages within the cabinet, the cabinet must be equipped with spill containment sumps. Safety cabinets to BS EN14470-2 for pressurized gas cylinders, are designed to accommodate cylinders in working areas. The gas is supplied to the desired application via a pipeline through pipe lead-throughs in the roof of the cabinet. These pipe penetrations must be sealed to ensure fire protection. Many pressurized gas cylinder cabinets are also fitted with "rolling ramps" which are inserted into the door or can be folded out so that the fire protection seals are not damaged when the cabinet is loaded. Models are available in various widths, heights and fire resistance classes and with a choice of door and locking systems: Widths (in cm): 60, 90, 120, 140 Heights: Tall units or under-bench units available in various heights Fire resistance classes: F15, F30, F60, F90 or G15, G30, G60, G90 Protection against fire (in minutes) Door and locking systems: Wing and folding doors available with sensor-controlled and fully automated door opening/closing Operation Connection of safety cabinets to a permanent exhaust air system is recommended. If a safety cabinet is not connected to a technical exhaust air system, a certain area in front of and around the cabinet is considered a Zone 2 hazardous area. If the safety cabinet is connected to