You may not store more than 60 gallons of category 1 2 or 3 flammable chemical liquids within.
Fuel storage cabinet regulations.
Indoor storage of flammable and combustible liquids 29 cfr 1926 152 b 1 no more than 25 gallons of flammable or combustible liquids shall be stored in a room outside of an approved storage cabinet.
For storage of liquefied petroleum gas see 1926 153.
Storage cabinets shall be designed and constructed to limit the internal temperature to not more than 325 deg.
25 gallons of class ia liquids in containers 4.
When subjected to a 10 minute fire test using the standard time temperature curve as set forth in standard methods of fire tests of building construction and materials nfpa 251 1969 which is incorporated by reference as specified.
The quantity of liquid that may be stored outside of an inside storage room or flammable liquid storage cabinets in any one fire area of a building cannot exceed.
120 gallons of class ib ic ii or iii liquids in containers.
1926 152 b 2 iii cabinets shall be labeled in conspicuous lettering flammable keep away from open flames 1926 152 b 3 not more than 60 gallons of category 1 2 and or 3 flammable liquids or 120 gallons of category 4 flammable liquids shall be stored in any one storage cabinet.
The nfpa and osha require flammable cabinets to be designed and constructed to specific requirements.
Per 1910 106 d 3 ii storage cabinets must be designed and constructed to limit the internal temperature to not more than 325 f when subjected to a 10 minute fire test and the cabinets must be labeled in conspicuous lettering flammable.
You may discover that you need a storage cabinet and in this case you must follow flammable storage cabinet requirements.