Typical Locations Class I - Explosion Proof Petroleum refineries, and gasoline storage and dispensing areas. Industrial firms that use flammable liquids in dip tanks for parts cleaning or other operations. Petrochemical companies that manufacture chemicals for gas and oil. Dry cleaning plants where vapors from cleaning fluids can be present. Facilities that have spraying areas where products are coated with paint or plastic.
Aircraft hangars and fuel servicing areas.
Utility gas plants and operations involving storage and handling of liquified petroleum gas or natural gas. Class II - Dust Ignition Proof Grain elevators, flour and feed mills. Plants that manufacture, use or store magnesium powders. Plants that have chemical or metallurgical processes. . . Producers of starch or candies.