Safety storage cabinets in accordance with DIN EN 14470-2
Uniform fire protection concept
The fire resistance rating of safety storage cabinets in accordance with DIN EN 14470-2 is determined by the rise in temperature of the cabinet interior inside a fire chamber according to the temperature/time curve in accordance with DIN EN 1363-1. On the basis of a starting temperature of 20 +/- 5 °C and the time it takes for the temperature increase on the surface of the canister valve holder to exceed 50 Kelvin, the cabinet is then classified as Type G15, G30, G60 or G90 (same as the time in minutes).
Type G90 - 90 minutes of fire protection
The SUPREME line plus safety storage cabinets for pressurised gas cylinders help you to ensure 90-minute fire resistance continuously in your laboratory. In combination with DÜPERTHAL Type 90 safety storage cabinets compliant with DIN EN 14470-1, the SUPREME line plus models are the ideal solution for continuous fire protection concepts in line with the highest standards.
Max. permissible temperature in the cabinet according to DIN EN 14470-1 = 200 °C (392 °F).
Temperature history according to EN 1363-1 in the fire chamber.
Example of the rising temperature of the Type 90 cabinet.
Max. permissible temperature on the surface of the valve holder according to DIN EN 14470-2 = 70 °C (158 °F).
Temperate history according to EN 1363-1 in the fire chamber.
Example of the rising temperature in the Type G90 cabinet.
Safety storage cabinets for pressurised gas cylinders
Protection objectives and minimum requirements
Safety storage cabinets for the storage of pressurised gas cylinders in accordance with DIN EN 14470-2 must be designed and constructed in such a way that in case of fire, no additional risks of the fire spreading result from the content. The fire resistance should enable employees to leave the working area and allow the fire brigade to reach the area and contain the fire before the pressurised gas cylinders become unstable. Minor amounts of escaping gas within the cabinet must be extracted to protect health and prevent explosions.
Test criteria in accordance with DIN EN 14470-2 | DIN EN14727
Extracts from DIN EN 14470-2
» The cabinets must have ventilation openings for air supply and exhaust air to enable connection to an exhaust air system.
» The air stream must ensure that minor amounts of escaping gas within the cabinet are extracted.
» For efficient purging, there must be at least a 10-fold air exchange, 120-fold for toxic gases, in the storage of flammable and oxidising gases.
» The ventilation must be in the upper and lower part of the cabinet.
» The pressure drop in the cabinet must not exceed 150 Pa.
Electric cables and gas lines
» The number of electrical cables and gas lines must be restricted to the absolute minimum.
» A maximum of three gas pipes with Ø 10 mm and two electrical cables with Ø 20 mm are permitted per pressurised gas cylinder.
» For the best possible fire resistance, tubes made of stainless steel or a material with similar thermal conductivity are recommended.
» Unused penetrations must be sealed in accordance with manufacturer’s specifications.
Fire chamber test
» Each cabinet model is type-tested in a fire chamber according to DIN EN 14470-2 Type G90/Type G30.
Extracts from DIN EN 14727
» The maximum storage capacity per safety storage cabinet including purging gas is 220 litres, up to a maximum of four 50 litre gas cylinders or up to three 70 litre gas cylinders.
» The pressurised gas cylinders in the cabinet may be used.
Introduction, removal and fastening
» A ramp or mechanical lifting equipment may be used, but this must not be made of aluminium.
» In the cabinet, a suitable mounting system must be installed to prevent the pressurised gas cylinders from falling over.
Static endurance test
» Standing surfaces, e.g. intermediate shelves, are subjected to a static load test and shock test and must not be broken or damaged.
Dynamic load test
» All mechanical (moving) components such as doors are tested with 50,000 cycles. After the tests, the doors must close exactly and snap into place.
Tested safety at the highest level including
Type testing according to DIN EN 14470-2 by recognised test institutes (TÜV Süd, ift Rosenheim).
Type G90/Type G30 classification in accordance with DIN EN 14470-2.
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