ASTM D7042-12e1
(Test Method)Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)
Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)
SIGNIFICANCE AND USE
5.1 Many petroleum products, and some non-petroleum materials, are used as lubricants and the correct operation of the equipment depends upon the appropriate viscosity of the liquid being used. In addition, the viscosity of many petroleum fuels is important for the estimation of optimum storage, handling, and operational conditions. Thus, the accurate determination of viscosity is essential to many product specifications.
5.2 Density is a fundamental physical property that can be used in conjunction with other properties to characterize both the light and heavy fractions of petroleum and petroleum products.
5.3 Determination of the density or relative density of petroleum and its products is necessary for the conversion of measured volumes to volumes at the standard temperature of 15°C.
SCOPE
1.1 This test method covers and specifies a procedure for the concurrent measurement of both the dynamic viscosity, η, and the density, ρ, of liquid petroleum products and crude oils, both transparent and opaque. The kinematic viscosity, ν, can be obtained by dividing the dynamic viscosity, η, by the density, ρ, obtained at the same test temperature.
1.2 The result obtained from this test method is dependent upon the behavior of the sample and is intended for application to liquids for which primarily the shear stress and shear rate are proportional (Newtonian flow behavior).
1.3 The precision has only been determined for those materials, viscosity ranges, density ranges, and temperatures as indicated in Section 15 on Precision and Bias. The test method can be applied to a wider range of materials, viscosity, density, and temperature. For materials not listed in Section 15 on Precision and Bias, the precision and bias may not be applicable.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 to determine the applicability of regulatory limitations prior to use.
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Designation: D7042 − 12
StandardTest Method for
Dynamic Viscosity and Density of Liquids by Stabinger
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Viscometer (and the Calculation of Kinematic Viscosity)
This standard is issued under the fixed designation D7042; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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ε NOTE—Updated Table 2 editorially in August 2012.
1. Scope* D445 Test Method for Kinematic Viscosity of Transparent
and Opaque Liquids (and Calculation of Dynamic Viscos-
1.1 Thistestmethodcoversandspecifiesaprocedureforthe
ity)
concurrent measurement of both the dynamic viscosity, η, and
D975 Specification for Diesel Fuel Oils
thedensity, ρ,ofliquidpetroleumproductsandcrudeoils,both
D2162 Practice for Basic Calibration of Master Viscometers
transparent and opaque. The kinematic viscosity, ν, can be
and Viscosity Oil Standards
obtained by dividing the dynamic viscosity, η, by the density,
D2270 Practice for Calculating Viscosity Index from Kine-
ρ, obtained at the same test temperature.
matic Viscosity at 40 and 100°C
1.2 The result obtained from this test method is dependent
D4052 Test Method for Density, Relative Density, and API
upon the behavior of the sample and is intended for application
Gravity of Liquids by Digital Density Meter
toliquidsforwhichprimarilytheshearstressandshearrateare
D6299 Practice for Applying Statistical Quality Assurance
proportional (Newtonian flow behavior).
and Control Charting Techniques to Evaluate Analytical
1.3 The precision has only been determined for those Measurement System Performance
D6300 Practice for Determination of Precision and Bias
materials,viscosityranges,densityranges,andtemperaturesas
indicated in Section 15 on Precision and Bias. The test method Data for Use in Test Methods for Petroleum Products and
Lubricants
can be applied to a wider range of materials, viscosity, density,
and temperature. For materials not listed in Section 15 on D6617 Practice for Laboratory Bias Detection Using Single
Test Result from Standard Material
Precision and Bias, the precision and bias may not be appli-
cable. D6708 Practice for StatisticalAssessment and Improvement
of Expected Agreement Between Two Test Methods that
1.4 The values stated in SI units are to be regarded as
Purport to Measure the Same Property of a Material
standard. No other units of measurement are included in this
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2.2 ISO Standards:
standard.
ISO5725 Accuracy(truenessandprecision)ofmeasurement
1.5 This standard does not purport to address all of the
methods and results
safety concerns, if any, associated with its use. It is the
ISO/IEC 17025 General Requirements for the Competence
responsibility of the user of this standard to establish appro-
of Testing and Calibration Laboratories
priate safety and health practices and to determine the
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2.3 Other Documents:
applicability of regulatory limitations prior to use.
NIST Technical Note 1297 Guideline for Evaluating and
Expressing the Uncertainty of NISTMeasurement Results
2. Referenced Documents
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2.1 ASTM Standards:
3. Terminology
3.1 Definitions:
3.1.1 density (ρ), n—mass per unit volume.
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This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee 3.1.2 dynamicviscosity(η),n—theratiobetweentheapplied
D02.07 on Flow Properties.
shear stress and rate of shear of a liquid.
Current edition approved April 15, 2012. Published July 2012. Originally
approved in 2004. Last previous edition approved in 2011 as D7042–11a.
DOI:10.1520/D7042-12E01.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
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Standards volume information, refer to the standard’s Document Summary page on Available from National Institute of Standards and Technology (NIST), 100
the ASTM website. Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
*A Summary of Changes section appears at the end of this standard
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D7042 − 12
3.1.2.1 Discussion—It is sometimes called the coefficient of
dynamic viscosity or, simply, viscosity. Thus, dynamic viscos-
ity is a measure of the resistance to flow or to deformation of
a liquid under external shear forces.
3.1.2.2 Discussion—Thetermdynamicviscositycanalsobe
used in a differen
...
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