CLASS I
Gases, vapors, and liquids
CLASS II
Combustable Dusts
E:
Metal dusts (conductive,
and explosive)
F:
Carbon dusts Coal, Coke
(some are conductive, and allare
explosive)
CLASS III
Ignitable Fibers and filings
Not normally present in an
Normally explosive
explosive concentration
and hazardous
(but may accidentally
exist)
G:
F|our, 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.
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)
4 9
INDUSTRIAL/RATINGS
