Portable Pneumatic/Air Vacuums
Class Hazardous Locations Defined
|Summary of Class I, II, III Hazardous Locations|
|I Gases, vapors, and liquids
B: Hydrogen, etc.
C: Ether, etc.
D: Hydrocarbons, fuels, solvents, etc.
|Normally explosive and hazardous||Not normally present in an explosive concentration (but may accidentally exist)|
|E: Metal dusts (conductive,*and explosive)
F: Carbon dusts (some are conductive,* and all are explosive)
G: Flour, starch, grain, combustible plastic or chemical dust (explosive)
|Ignitable quantities of dust normally are or may be in suspension, or conductive dust may be present||Dust not normally suspended in an ignitable concentration (but may accidentally exist). Dust layers are present.|
|III Fibers and flyings
|Textiles, wood-working, etc. (easily ignitable, but not likely to be explosive)||Handled or used in manufacturing||Stored or handled in storage (exclusive of manufacturing)|