MIL-HDBK-1022A
NFPA. Abbreviation for the National Fire Protection
Association.
Nipple. Short length of pipe, usually used to make side
branch connections.
Nondestructive Testing. A method of inspecting materials
without cutting, drilling or otherwise destroying the
material; usually used to examine steel plates, pipes, and
welds.
Nozzle. A spout or connection, usually with a control valve
through which fuel is discharged into a receiving container.
NPDES.
National Pollutant Discharge Elimination System.
Octane Number. A numerical measure of the antiknock
properties of automotive gasoline as measured against standard
reference fuels, under controlled laboratory conditions. Iso-
octane is a reference fuel whose octane number is given a
value of 100.
Off-Spec. Commonly used contraction for off-specification,
usually referring to fuel which is contaminated or otherwise
deficient in quality.
Oil/water Separator. A device used to separate mixtures of
oil and water, usually by the difference in specific gravity
and usually to protect the environment from contamination by
the oil.
Oily-water Mixture. Mixture in which water comprises more
than half the total. Most such untreated mixtures contain
less than 15 percent oil, some of which may be in emulsified
form.
OMSI.
Operation and maintenance support information.
Operating Storage Tank. Storage tank from which fuel is
issued directly to the final-use vehicle such as a ship or
aircraft, sometimes called day tanks or ready-issue tanks.
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