NFPA 30 Section 9.5 guides the proper storage of flammable liquids in compliant safety cabinets. Although powerful accelerants, lubricants, and degreasers keep the wheels of industrial progress chugging, they also come with inherent risks. Flammable liquid fires cause thousands of dollars in structural damage annually. Fortunately, most chemical fires are preventable with a NFPA 30 Section 9.5 compliant safety storage cabinet. NFPA 30 Section 9.5 for metal safety cabinets requires the “bottom, top, door, and sides of the (storage) cabinet shall be at least No. 18 gauge sheet steel and shall be double-walled.” Our fire-rated chemical storage lockers can accommodate large stockpiles of flammable liquids by meeting NFPA 30 building requirements. Our chemical storage warehouses and cabinets can be equipped with mechanical ventilation, fire suppression, and climate control. Contact us today for a free quote and consultation.
NFPA 30 Section 9.5 Storage Guidelines
According to NFPA 30 Section 9.5, the total volume for storage of Class I, Class II, and Class IIIA liquids should not surpass 120 gallons in a single storage locker or cabinet. Furthermore, “the total aggregate volume of Class I, Class II, and Class IIIA liquids in a group of storage cabinets shall not exceed the maximum allowable quantity of flammable and combustible liquids per control area based on the occupancy where the cabinets are located.”
Each chemical storage cabinet or warehouse should display “FLAMMABLE” and “KEEP FIRE AWAY” signage and markings. The letter height for “FLAMMABLE” should be two inches while the minimum letter height for “KEEP FIRE AWAY” should be one inch. Although NFPA 30 Section 9.5 also guides flammable liquid storage in wooden and metal cabinets, we recommend a steel solution. Our fire-rated chemical storage lockers are comprised of superior steel sheeting and solid steel welds offering maximum strength of protection. Furthermore, our chemical storage lockers also meet the NFPA 30 Section 9.5 requirements for riveted or welded structural joints.
Storage cabinets designed and constructed to limit the internal temperature at the center of the cabinet and 1 in. (25 mm) from the top of the cabinet to not more than 325°F (163°C), when subjected to a 10-minute fire test that simulates the fire exposure of the standard time–temperature curve specified in ASTM E 119, Standard Test Methods for Fire Tests of Building Construction and Materials, shall be acceptable.
Source: NFPA 30 9.5
While wooden chemical storage cabinets are cheaper than rigid steel construction they typically don’t allow for the equipping of fire suppression and mechanical ventilation which are available in a U.S. Hazmat Rentals chemical warehouse. Choosing a steel-panelized storage locker increases mechanical and passive ventilation options, reducing the potential buildup of flammable vapors. Each U.S. Hazmat Rentals locker is also equipped with an chemical spill containment system. During a spill inside the locker, the toxic substance will easily pass through a steel-grated flooring system into a sump affixed to the bottom of the locker, preventing environmental contamination. At U.S. Hazmat Rentals, we surpass standard regulations in providing the ultimate solution to your storage dilemmas.
Other NFPA 30 Section 9.5 Requirements
According to the NFPA, “the door (of the metal storage cabinet) should provide a three-point latch arrangement, and the door sill shall be raised at least 2 in. (50 mm) above the bottom of the cabinet to retain spilled liquid within the cabinet.” Furthermore, ” vent openings shall be ducted directly to a safe location outdoors or to a treatment device designed to control volatile organic compounds (VOCs) and ignitable vapors in such a manner that will not compromise the specified performance of the cabinet and in a manner that is acceptable to the authority having jurisdiction.”
