Flammable storage cabinets must adhere to strict construction and usage standards to ensure safety and compliance with regulations. Below are the key requirements and considerations:
Cabinets must be constructed using 1.2mm thick galvanized steel plate, double-layer structure and resistant to degradation under fire conditions.
Joints should be rabbeted and secured with screws oriented in two directions for enhanced stability.
For cabinets with multiple doors, a rabbeted overlap of at least 1 inch is mandatory to reduce the risk of fire penetration.
Cabinets must bear a conspicuous label stating: "Flammable – Keep Away from Open Flames.
Storage capacity is limited to ensure safety: no more than 60 gallons of Category 1, 2, and/or 3 flammable liquids or 120 gallons of Category 4 flammable liquids per cabinet.
According to OSHA Standard 1910.106(e)(6)(ii), grounding of flammable liquid storage cabinets is not required. The standard specifies that Class I liquids should not be dispensed into containers unless the nozzle and container are electrically interconnected.
Ventilation Requirements
Prevent vapors from escaping into the room, ensuring containment within the cabinet.
Be vented safely to the outside atmosphere at a location where vapors can disperse without creating hazards.
Acids and bases must be stored separately in dedicated cabinets designed for corrosive materials.
Oxidizers must not be stored alongside flammables to prevent dangerous chemical reactions.
No potential sources of ignition should ever be stored inside a flammable storage cabinet to mitigate fire risks.