National Fire Protection Association 30 - Safety Cabinets

NFPA 30 18.5.4.1 The maximum quantity of liquids permitted for incidental operations

The maximum quantity of liquids permitted for incidental operations in a single fire area shall not exceed the greater of the following:
(1)*The amount required to supply incidental operations for one continuous 24-hour period
(2) The aggregate sum of the following:
(a) 25 gal (95 L) of Class IA liquids in containers
(b) 120 gal (454 L) of Class IB, Class IC, Class II, or Class III liquids in containers
(c) 1585 gal (6000 L) of any combination of the following: i. Class IB, IC, II, or IIIA liquids in metal portable tanks or metal intermediate bulk containers, each not exceeding 793 gal (3000 L)

ii. Class II or Class IIIA liquids in nonmetallic intermediate bulk containers, each not exceeding 793 gal (3000 L) (d) 20 portable tanks or intermediate bulk containers each not exceeding 793 gal (3000 L) of Class IIIB liquids

NFPA 30 9.17.2 Liquids shall be separated from Level 2 and Level 3 aerosols

Liquids shall be separated from Level 2 and Level 3 aerosols in accordance with NFPA30B, Code for the Manufacture and Storage of Aerosol Products.

NFPA 30 9.5.1 thru 9.5.4.2 Safety Cabinets

9.5.1 The volume of Class I, Class II, and Class IIIA liquids stored in an individual storage cabinet shall not exceed 120 gal (460 L).

9.5.2 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.

9.5.3 Storage cabinets that meet at least one of the following sets of requirements shall be acceptable for storage of liquids:
(1) 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. All joints and seams shall remain tight and the door shall remain securely closed during the test.
(2) Metal storage cabinets constructed in the following manner shall be acceptable:
(a) The bottom, top, door, and sides of the cabinet shall be at least No. 18 gauge sheet steel and shall be double-walled, with 11?2 in. (38 mm) air space.
(b) Joints shall be riveted, welded, or made tight by some equally effective means.
(c) The door shall be provided with 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.
(3) Wooden cabinets constructed in the following manner shall be acceptable:
(a) The bottom, sides, and top shall be constructed of exterior grade plywood that is at least 1 in. (25 mm) thick and of a type that will not break down or delaminate under fire conditions.
(b) All joints shall be rabbetted and shall be fastened in two directions with wood screws.
(c) Where more than one door is used, there shall be a rabbetted overlap of not less than 1 in. (25 mm).
(d) Doors shall be equipped with a means of latching, and hinges shall be constructed and mounted in such a manner as to not lose their holding capacity when subjected to fire exposure.
(e) A raised sill or pan capable of containing a 2 in. (50 mm) depth of liquid shall be provided at the bottom of the cabinet to retain spilled liquid within the cabinet.
(4) Listed storage cabinets that have been constructed and tested in accordance with 9.5.3(1) shall be acceptable.

9.5.4* Storage cabinets shall not be required by this code to be ventilated for fire protection purposes.

9.5.4.1 If a storage cabinet is not ventilated, the vent openings shall be sealed with the bungs supplied with the cabinet or with bungs specified by the cabinet manufacturer.

9.5.4.2* If a storage cabinet is ventilated for any reason, the vent openings shall be ducted directly to a safe location outdoors or to a treatment device designed to control volatile organic compounds (VOCs) and ignitible 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.

9.5.5* Storage cabinets shall include the following marking:
FLAMMABLE
KEEP FIRE AWAY

9.5.5.1 The minimum letter height for FLAMMABLE (signal word) shall be 2.0 in. (50 mm) and the minimum letter height for KEEP FIRE AWAY (message) shall be 1.0 in. (25 mm).

9.5.5.2 All letters shall be uppercase and in contrasting color to the background.

9.5.5.3 The marking shall be located on the upper portion of the cabinet’s front door(s) or frame.

9.5.5.4 Use of other languages, the international symbol for “flammable” (a flame in a triangle), the international symbol for “keep fire away” (a burning match in “no” circle) shall be

Please consult your local authority having jurisdiction with your questions and for guidance in conforming to laws as they apply to your application. This is only meant for a reference and does not imply a warranty.

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