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Divisions made of incombustible material and capable of preventing the passage of smoke and flame up to the end of the first 12 hour of the standard fire test.

Related Terms

ABRASION RESISTANCE

The ability of a material to resist surface wear.

DIELECTRIC STRENGTH

A measure of the ability of an insulating material to withstand electric stress (voltage) without failure. Fluids with high dielectric strength (usually expressed in volts or kilovolts) are good electrical insulators. (ASTM Designation D 877.)

ABSORPTION

The assimilation of one material into another; in petroleum refining, the use of an absorptive liquid to selectively remove components from a process stream.

CARBON RESIDUE

Coked material remaining after an oil has been exposed to high temperatures under controlled conditions.

CONTAMINATION CONTROL

A broad subject which applies to all types of material systems (including both biological and engineering). It is concerned with planning, organizing, managing, and implementing all activities required to determine, achieve and maintain a specified contamination level.

EMISSION SPECTROMETER

Works on the basis that atoms of metallic and other particular elements emit light at characteristic wavelengths when they are excited in a flame, arc, or spark. Excited light is directed through an entrance slit in the spectrometer. This light penetrates the slit, falls on a grate, and is dispersed and reflected. The spectrometer is calibrated by a series of standard samples containing known amounts of the elements of interest. By exciting these standard samples, an analytical curve can be established which gives the relationship between the light intensity and its concentration in the fluid.

DUNNAGE

Cushioning material placed among cargo to prevent their motion

BASE

A material which neutralizes acids. An oil additive containing colloidally dispersed metal carbonate, used to reduce corrosive wear.

END CAP

A ported or closed cover for the end of a filter element.

ENVIRONMENTAL CONTAMINANT

All material and energy present in and around an operating system, such as dust, air moisture, chemicals, and thermal energy.
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