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ASTM D7042-21a

Current Revision

Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)

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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, health, and environmental practices and to determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


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.

SDO ASTM: ASTM International
Document Number D7042
Publication Date Nov. 1, 2021
Language en - English
Page Count 14
Revision Level 21a
Supercedes
Committee D02.07
Publish Date Document Id Type View
Nov. 1, 2021 D7042-21A Revision
Jan. 1, 2021 D7042-21 Revision
June 1, 2020 D7042-20 Revision
Dec. 1, 2019 D7042-19E01 Revision
Dec. 1, 2019 D7042-19 Revision
May 15, 2016 D7042-16E03 Revision
May 15, 2016 D7042-16E02 Revision
May 15, 2016 D7042-16E01 Revision
May 15, 2016 D7042-16 Revision
May 1, 2014 D7042-14 Revision
Nov. 1, 2012 D7042-12A Revision
April 15, 2012 D7042-12E01 Revision
April 15, 2012 D7042-12 Revision
Oct. 1, 2011 D7042-11A Revision
Feb. 15, 2011 D7042-11 Revision
Oct. 1, 2010 D7042-10 Revision
July 1, 2004 D7042-04 Revision