ASTM D7042 - 12a

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

    Active Standard ASTM D7042 | Developed by Subcommittee: D02.07

    Book of Standards Volume: 05.04


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    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.

    1. 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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

    D975 Specification for Diesel Fuel Oils

    D2162 Practice for Basic Calibration of Master Viscometers and Viscosity Oil Standards

    D2270 Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100C

    D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

    D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance

    D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants

    D6617 Practice for Laboratory Bias Detection Using Single Test Result from Standard Material

    D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material

    ISO Standards

    ISO5725 Accuracy (trueness and precision) of measurement methods and results

    ISO/IEC17025 General Requirements for the Competence of Testing and Calibration Laboratories

    Other Documents

    NISTTechnicalNote129 Guideline for Evaluating and Expressing the Uncertainty of NIST Measurement Results


    ICS Code

    ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)

    UNSPSC Code

    UNSPSC Code 41103312(Viscosimeters)


    DOI: 10.1520/D7042-12A

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