Flammable Storage Cabinets

Criteria for Flammable Storage Cabinets

All flammable and combustible liquids, regardless of the quantity, must be stored properly. For most situations this means that flammable and combustible liquids will be stored in an approved flammable storage cabinet.

The State of Florida has adopted NFPA  30, Flammable and Combustible Liquids Code, 1993, to govern the storage and dispensing of flammable and combustible liquids. The attached information on flammable storage cabinets has been taken from NFPA 30, 4-3, Design, Construction, and Capacity of Storage Cabinets.

Please use this information to ensure that all flammable liquid storage cabinets, whether currently in use or for future purchase, meet or exceed these standards. Cabinets that do not meet the minimum standards set forth by NFPA 30 are not authorized for the storage of flammable liquids at FIU.

The following information was taken from NFPA 30, NFPA 30, 4-3, Design, Construction, and Capacity of Storage Cabinets.

All Cabinets

Cabinets shall be marked in conspicuous lettering:


Cabinets are not required to be vented for fire protection purposes; however the following shall apply:

  • If vented, the cabinet shall be vented outdoors.
  • If not vented, the vent opening shall only be sealed with bungs supplied with the cabinet or with bungs specified by the manufacturer.
  • The door (s) shall be equipped with a latch.
  • A door sill shall be raised at least two inches from the bottom of the cabinet, or a pan capable of holding at least two inches of fluid must be provided to retain spilled liquid.
  • No more than three (3) flammable storage cabinets in one area.
  • No more than 60 gallons of Class I (flammable) and Class II & IIIA (combustilble) liquids shall be stored inside the cabinet.

Any listed cabinets that have been constructed and tested in accordance with NFPA 30, 4-3.2 shall be acceptable.

Metal Cabinets

The bottom, top, doors & sides shall be constructed of at least No. 18 gauge sheet steel, double-walled with an 1 ½ inch air space.

All joints shall be riveted, welded, or made tight by some equally effective means.

Wooden Cabinets

The bottom, top, door and sides shall be constructed of exterior grade plywood at least 1 inch thick.

All joints shall be riveted and fastened in two directions with wood screws.

If the cabinet has more than one door, one of the doors shall have a riveted overlap of not less than one inch.

NOTE: Usually, flammable liquid storage cabinets will have a Factory Mutal (FM) or Underwriters Laboratories (UL) label, cabinets without such a label should not be used for flammable liquid storage.