ASTM D 2140 Standard Test Method for Carbon-Type Composition of Insulating Oils of Petroleum Origin
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ASTM D 2140 Document Information:
Title
Standard Test Method for Carbon-Type Composition of Insulating Oils of Petroleum Origin
ASTM International
Publication Date:
Mar 10, 2003
Scope:
This test method may be used to determine the carbon-type composition
of mineral insulating oils by
correlation with basic physical properties. For routine analytical
purposes it eliminates the
necessity for complex fractional separation and purification
procedures. The test method is
applicable to oils having average molecular weights from 200 to above
600, and 0 to 50 aromatic
carbon atoms.
Carbon-type composition is expressed as percentage of aromatic
carbons, percentage of naphthenic
carbons, and percentage of paraffinic carbons. These values can be
obtained from the correlation
chart, Fig. 1, if both the viscosity-gravity constant (VGC) and
refractivity intercept (ri) of the
oil are known. Viscosity, density and relative density (specific
gravity), and refractive index are
the only experimental data required for use of this test method.
This test method is useful for determining the carbon-type composition
of electrical insulating
oils of the types commonly used in electric power transformers and
transmission cables. It is
primarily intended for use with new oils, either inhibited or
uninhibited.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Keywords:
- carbon type
- composition
- electrical oils
- mineral oils
- oils
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