Rust resistant zinc coating applied to iron and
An electrical connection to earth.
Haypack Filter. A filter which uses hay, straw, or excelsior
as a filtering medium.
flammable or combustible liquids or vapors may be present.
Hot Refueling. Refueling of aircraft which have one or more
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.
Pressure caused by a column of liquid.
liquid under pressure as the test medium.
International Conference of Building Officials.
Ignition Temperature. The minimum temperature required to
initiate or cause self-sustained combustion independent of any
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.