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GLOSSARY
Head.
An expression of pressure, usually stated in terms of inches or feet.
Hydrostatic Pressure.
Pressure due only to the weight of the liquid itself. Hydrostatic pressure goes from zero at the
top of a column of liquid to a maximum at the bottom of the column.
Hydrostatic Qualified.
A method of approving equipment for use at a specified working pressure by subjecting the
equipment to 1-1/2 to 2 times the working pressure required.
-i-
Interface.
A mixture, or commingling, between adjacent products in a multiproduct pipeline; found between batches.
-j-
Jet Fuel (JP).
Fuel meeting the required properties for use in jet engines and aircraft turbine engines. Jet fuels are
procured for the Armed Forces in several grades. The most important grades are JP-4 (low vapor pressure) and
JP-5 (high flashpoint), both produced under Specification MIL-T-5624 and designed for use in aircraft turbine
engines. JP-6, produced under Specification MIL-J-25656, is designed for use in aircraft turbine and jet engines of
land-based supersonic aircraft. RJ-1, produced under Specification MIL-F25558, is designed for use in ramjet
aircraft engines. Jet fuel is usually called JP (jet propulsion) fuel.
-k-
Kevlar.
A Dupont trade name for a synthetic, tough, fire resistant fabric.
Line Fill.
See Line Pack Line Loss. See Friction Loss Line Pack. The liquid or gas inside a pipeline or hoseline.
Line Loss See Friction Loss
Line Pack The liquid or gas inside a pipeline or hoseline.
Glossary 5
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