ASTM D7042-2016e1 9562 Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)《利用Stabinger动力粘度计测定液体动态.pdf
《ASTM D7042-2016e1 9562 Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)《利用Stabinger动力粘度计测定液体动态.pdf》由会员分享,可在线阅读,更多相关《ASTM D7042-2016e1 9562 Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)《利用Stabinger动力粘度计测定液体动态.pdf(13页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D7042 161Standard Test Method forDynamic Viscosity and Density of Liquids by StabingerViscometer (and the Calculation of Kinematic Viscosity)1This standard is issued under the fixed designation D7042; the number immediately following the designation indicates the year oforiginal adoptio
2、n or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEThe title of Table X3.2 was corrected editorially in July 2016.1. Scope*1.1 This t
3、est method covers and specifies a procedure for theconcurrent measurement of both the dynamic viscosity, , andthe density, , of liquid petroleum products and crude oils, bothtransparent and opaque. The kinematic viscosity, , can beobtained by dividing the dynamic viscosity, , by the density, obtaine
4、d at the same test temperature.1.2 The result obtained from this test method is dependentupon the behavior of the sample and is intended for applicationto liquids for which primarily the shear stress and shear rate areproportional (Newtonian flow behavior).1.3 The precision has only been determined
5、for thosematerials, viscosity ranges, density ranges, and temperatures asindicated in Section 15 on Precision and Bias. The test methodcan be applied to a wider range of materials, viscosity, density,and temperature. For materials not listed in Section 15 onPrecision and Bias, the precision and bias
6、 may not be appli-cable.1.4 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this st
7、andard to establish appro-priate safety and health practices and to determine theapplicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D396 Specification for Fuel OilsD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids (and Calculation
8、of Dynamic Viscos-ity)D975 Specification for Diesel Fuel OilsD2162 Practice for Basic Calibration of Master Viscometersand Viscosity Oil StandardsD2270 Practice for Calculating Viscosity Index from Kine-matic Viscosity at 40 C and 100 CD4052 Test Method for Density, Relative Density, and APIGravity
9、of Liquids by Digital Density MeterD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD6617
10、 Practice for Laboratory Bias Detection Using SingleTest Result from Standard MaterialD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a MaterialD6751 Specification for Biodiesel Fuel Blend Stock (B100
11、)for Middle Distillate FuelsD7467 Specification for Diesel Fuel Oil, Biodiesel Blend(B6 to B20)2.2 ISO Standards:3ISO 5725 Accuracy (Trueness and Precision) of Measure-ment Methods and ResultsISO 8217 Specifications for Marine FuelsISO/IEC 17025 General Requirements for the Competenceof Testing and
12、Calibration Laboratories2.3 Other Documents:4NIST Technical Note 1297 Guideline for Evaluating andExpressing the Uncertainty of NIST Measurement Results1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibilit
13、y ofSubcommittee D02.07 on Flow Properties.Current edition approved May 15, 2016. Published June 2016. Originallyapproved in 2004. Last previous edition approved in 2014 as D7042 14.DOI:10.1520/D7042-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Ser
14、vice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from National Instit
15、ute of Standards and Technology (NIST), 100Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist.gov.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Term
16、inology3.1 Definitions:3.1.1 density (), nmass per unit volume.3.1.2 dynamic viscosity (), nthe ratio between the appliedshear stress and rate of shear of a liquid.3.1.2.1 DiscussionIt is sometimes called the coefficient ofdynamic viscosity or, simply, viscosity. Thus, dynamic viscos-ity is a measur
17、e of the resistance to flow or to deformation ofa liquid under external shear forces.3.1.2.2 DiscussionThe term dynamic viscosity can also beused in a different context to denote a frequency-dependentquantity in which shear stress and shear rate have a sinusoidaltime dependence.3.1.3 kinematic visco
18、sity (), nthe ratio of the dynamicviscosity () to the density () of a liquid.3.1.3.1 DiscussionFor gravity flow under a given hydro-static head, the pressure head of a liquid is proportional to itsdensity (). Therefore the kinematic viscosity () is a measureof the resistance to flow of a liquid unde
19、r gravity.3.1.4 relative density (also called specific gravity (SG),nthe ratio of the density of a material at a stated temperatureto the density of a reference material (usually water) at a statedtemperature.4. Summary of Test Method4.1 The test specimen is introduced into the measuring cells,which
20、 are at a closely controlled and known temperature. Themeasuring cells consist of a pair of rotating concentric cylin-ders and an oscillating U-tube. The dynamic viscosity isdetermined from the equilibrium rotational speed of the innercylinder under the influence of the shear stress of the testspeci
21、men and an eddy current brake in conjunction withadjustment data. The density is determined by the oscillationfrequency of the U-tube in conjunction with adjustment data.The kinematic viscosity is calculated by dividing the dynamicviscosity by the density.5. Significance and Use5.1 Many petroleum pr
22、oducts, and some non-petroleummaterials, are used as lubricants and the correct operation ofthe equipment depends upon the appropriate viscosity of theliquid being used. In addition, the viscosity of many petroleumfuels is important for the estimation of optimum storage,handling, and operational con
23、ditions. Thus, the accurate deter-mination of viscosity is essential to many product specifica-tions.5.2 Density is a fundamental physical property that can beused in conjunction with other properties to characterize boththe light and heavy fractions of petroleum and petroleumproducts.5.3 Determinat
24、ion of the density or relative density ofpetroleum and its products is necessary for the conversion ofmeasured volumes to volumes at the standard temperature of15C.6. Apparatus6.1 Stabinger Viscometer5,66.1.1 Viscosity MeasurementThe Stabinger viscometeruses a rotational coaxial cylinder measuring s
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