When examining a risk where flammable and combustible liquids are present, underwriters should determine whether the storage tanks and containers meet standard requirements. The types and amounts of stored flammable and combustible liquids affect many of the requirements.

To keep liquids and vapors from entering a building, underground tanks must have standard fill/vent pipes at a certain distance from building openings. Above ground tanks must have a fill/vent at least 24 inches from the building opening and must be equipped with standard piping and other devices.

Inside storage areas must have:

  • liquid-tight floors and floor-wall junctions
  • fire-resistant construction
  • explosion-proof wiring and electrical equipment
  • listed fire doors

Inside storage area:

Checking the contents of liquid storage containers:

Proper storage

Improper storage: