MIL-HDBK-1022A
Galvanizing.
Rust resistant zinc coating applied to iron and
steel.
Ground.
An electrical connection to earth.
Haypack Filter. A filter which uses hay, straw, or excelsior
as a filtering medium.
Hazardous Area. Electrical classification for areas where
flammable or combustible liquids or vapors may be present.
HDPE.
High-density polyethylene.
Hot Refueling. Refueling of aircraft which have one or more
engines running.
HTH.
Calcium hypochlorite.
Hydrant System. Distribution and dispensing system for
aviation turbine fuels consisting of a series of fixed flush
type outlets or hydrants connected by piping.
Hydrocarbon. A compound made up exclusively of hydrogen and
carbon in various ratios and molecular arrangements.
Hydrostatic Head.
Pressure caused by a column of liquid.
Hydrostatic Test. A test for leaks in a piping system using
liquid under pressure as the test medium.
ICBO.
International Conference of Building Officials.
Ignition Temperature. The minimum temperature required to
initiate or cause self-sustained combustion independent of any
heating or heated element.
Impervious.
Not easily penetrated. The property of a
material that does not allow, or allows only with great
difficulty, the movement or passage of a fluid. Also referred
to as impermeable.
Impressed Current System. A cathodic protection system using
an outside source of electric power.
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