Fuel System Icing Inhibitor (FSII) An agent to be
used only as an antiicing additive for jet turbine
bottoms In a distilling operation, the portion of the
engine fuels.
charge remaining in the still or flask at the end of a
run; in pipe stilling or distillation, the portion which
gum Varnish-like, tacky, noncombustible insoluble
does not vaporize.
deposits formed during the deterioration of
petroleum and its products, particularly gasoline.
contaminated product A product in which one or
The amount of gummy material in gasoline is
more grades or types of products have been
known as its gum content, which is determined
inadvertently mixed, or a product containing
by ASTM Methods D-381 and D-873.
foreign matter, such as dust, dirt, rust, water, or
inhibitor A substance added in small amounts to a
cut A fraction obtained by a separation process.
petroleum product to prevent or retard
undesirable chemical changes from taking place
Product withdrawn from a pipeline and routed into
in the product or in the condition of the
tankage. Product withdrawn from the middle of a
equipment in which the product is used. The
batch is referred to as a heart cut. In gaging bulk
essential function of inhibitors is to prevent or
fuel, the mark made by a petroleum product in
retard oxidation or corrosion.
contact with the gaging instrument. The cut shows
the level of the product.
innage The height or volume of liquid in a storage
Defense Fuel Supply Center (DFSC) An activity
tank, as measured or gaged from the bottom of
the tank to the top of the liquid.
under the Defense Logistics Agency (DLA) with
responsibility as the integrated materiel manager
(IMM) for wholesale bulk petroleum products until
micron One micron is a thousandth part of one
their delivery to the point of sale. This
millimeter (approximately 25,400 microns equal
responsibility includes contract administration in
1 inch). The average human hair is about 100
oversea areas.
microns in diameter.
deterioration Any undesirable chemical or physical
off-specification product A product which fails to
change that takes place in a product during
meet one or more of the physical, chemical, or
storage or use. Some of the more common forms
performance requirements of the specification.
of deterioration are weathering, gum formation,
weakening of additives, and change in color.
Reid Vapor Pressure (RVP) The measure of
pressure exerted by a product on the interior of a
distillation Vaporization of a liquid and its
special container due to its tendency to vaporize.
subsequent condensation in a different chamber.
In refining, it refers to the separation of one group
ullage The amount a tank, or container, lacks of
of petroleum constituents from another by means
being full.
of volatilization in some form of closed apparatus,
such as a still, by the aid of heat. ASTM
upgrade A grade that slopes upward in the
distillation: Any distillation made according to an
direction of pipeline flow. To change service
ASTM distillation procedure, especially a
from a dark or heavy product to a light or volatile
distillation test made on such products as gasoline,
product; refers to the nature of a product stored
jet or turbine fuels, and kerosene to determine the
in a tank or transported in a tanker, tank car, or
initial and final boiling points and the boiling range.
tank truck. To blend a higher grade gasoline
interface into tankage containing a lower grade
flash point The lowest temperature at which a liquid
gasoline.
petroleum product gives off vapor in sufficient
concentration to ignite (that is, flash) on application
of a flame under specified conditions.
foaming The formation of froth or foam on
lubricating oils or other oils as a result of aeration
or release of gas dissolved in the oil. Foaming
characteristics of lubricating oils are determined by
ASTM Method D- 892.
QM 5184
A-2
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