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NOTE: This is an unformatted excerpt from our online fire protection training library.

Identifying Materials & Equipment

Introduction

Identifying Materials & Equipment

Areas are considered hazardous or classified due to the presence or possible presence of flammable gases or vapors, flammable liquids, combustible dust, or ignitible fibers or flyings. These products may present fire or explosion hazards in a facility. However, the degree of hazard and the types of electrical equipment needed to reduce the hazard are dependent on the properties of the specific flammable, combustible, or ignitible materials. Some materials are more hazardous than others or may involve different hazards than others. Therefore, equipment must be selected for compatibility with the specific characteristics The fire and explosion characteristics of dusts are different than liquids, gases, or vapors. Hazards also vary between different types of dusts or different types of liquids, vapors, or gases. of the materials involved, and we must have some way of comparing and categorizing the differences in materials. Although there are no specific groupings for ignitible fibers and flyings Fibers and flyings are all treated as one "group." The criteria for evaluating electrical equipment used where fibers and flyings are present are the same for all fibers and flyings., dusts, liquids, vapors, and gases are grouped according to their characteristics.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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