Flammable Storage Codes: August 2021 Safety & Hygiene Corner

What is required per OSHA and NFPA Codes for Flammable Storage Cabinets?

You are aware of what flammable storage cabinets look like; but do you know what is required per OSHA and NFPA Codes.  We receive a lot of questions regarding flammable storage cabinets, so here are some answers.  This safety corner will address some of the key code requirements.

How much flammable material can I store in one cabinet? –  OSHA and NFPA have a maximum capacity not more than 60 gallons of Category 1, 2, or 3 flammable liquids and not more than 120 gallons of Category 4 flammable liquids may be stored in a storage cabinet.

What is required in the design of flammable cabinets? Flammable cabinet must have a degree of fire resistance.   This is defined in 1910.106(d)(3)(ii) as construction shall limit the internal temperature to not more than 325 degrees F, when subjected to a 10-minute fire test using the standard time-temperature curve as set forth in NFPA 251-1969. All joints and seams shall remain tight and the door shall remain securely closed during the fire test. Cabinets shall be labeled in conspicuous lettering, “Flammable – Keep Fire Away”.  Metal flammable cabinets meet code requirements when the bottom, top, door, and sides of cabinet shall be at least No. 18 gage sheet iron and double walled with 1 1/2 – inch air space. Joints shall be riveted, welded or made tight by some equally effective means. The door shall be provided with a three-point lock, and the door sill shall be raised at least 2 inches above the bottom of the cabinet.

What should I look for when auditing flammable cabinets?

  • Grounding and bonding of the cabinet and any containers you are dispensing from inside the cabinet must be in place.
  • Doors need to be keep closed unless in use and all three points of contact on the doors must be in good working condition. 
  • Cabinet bungs must be in place and secure.  
  • Clearly labeled.
  • Text Box: Figure 1 Photo- OSHA Office of Training and EducationNot located near forklift or equipment access. 
  • Not be placed in aisleways used for emergency egress.

*Provided by the Ohio BWC safety consultants.