1、Designation:D227010(Reapproved 2016)British Standard 4459Designation:226/91(95)Standard Practice forCalculating Viscosity Index from Kinematic Viscosity at40 C and 100 C1This standard is issued under the fixed designation D2270;the number immediately following the designation indicates the year ofor
2、iginal adoption 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.This standard has been approved for use by agencies of the U.S.Department of De
3、fense.1.Scope1.1 This practice2covers the procedures for calculating theviscosity index of petroleum products,such as lubricating oils,and related materials from their kinematic viscosities at 40 Cand 100 C.NOTE1The results obtained from the calculation of VI from kine-matic viscosities determined a
4、t 40 C and 100 C are virtually the same asthose obtained from the former VI system using kinematic viscositiesdetermined at 37.78 C and 98.89 C.1.2 This practice does not apply to petroleum products withkinematic viscosities less than 2.0 mm2/s at 100 C.Table 1given in this practice applies to petro
5、leum products withkinematic viscosities between 2 mm2/s and 70 mm2/s at100 C.Equations are provided for calculating viscosity indexfor petroleum products having kinematic viscosities above70 mm2/s at 100 C.1.2.1 In cases where kinematic viscosity data are not avail-able at temperatures of 40 C and 1
6、00 C,an estimate may bemade of the viscosity index by calculating the kinematicviscosity at temperatures of 40 C and 100 C from dataobtained at other temperatures.Such viscosity index data maybe considered as suitable for information only and not forspecification purposes.See Test Method D341,Annex
7、A1.1.3 The kinematic viscosity values are determined withreference to a value of 1.0034 mm2/s at 20.00 C for distilledwater.The determination of the kinematic viscosity of apetroleum product shall be carried out in accordance with TestMethods D445,D7042,IP 71,or ISO 3104.1.3.1 If Viscosity Index cal
8、culated for a given sample usingkinematic viscosity measurements from different test methodsare in disagreement,the values calculated from Test MethodD445 measurements shall be accepted.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in this
9、standard.1.4.1 The values stated in SI units are to be regarded as thestandard.For user reference,1 mm2/s=10-6m2/s=1 cSt.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 standard to establish appro-pria
10、te safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3D341 Practice for Viscosity-Temperature Charts for LiquidPetroleum ProductsD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Ca
11、lculation of Dynamic Viscos-ity)D1695 Terminology of Cellulose and Cellulose DerivativesD7042 Test Method for Dynamic Viscosity and Density ofLiquids by Stabinger Viscometer(and the Calculation ofKinematic Viscosity)E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with
12、Specifications2.2 ISO Standards:4ISO 3104 Petroleum ProductsTransparent and OpaqueLiquidsDetermination of Kinematic Viscosity and Cal-culation of Dynamic Viscosity1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct respons
13、ibility of Subcom-mittee D02.07 on Flow Properties.In the IP,this practice is under the jurisdiction of the Standardization Committeeand issued under the fixed designation IP 226.The final number indicates the yearof last revision.Current edition approved Jan.1,2016.Published February 2016.Originall
14、yapproved in 1964.Last previous edition approved in 2010 as D2270 101.DOI:10.1520/D2270-10R16.2Supporting data(Metrication of Viscosity Index System Method D2270)havebeen filed at ASTM International Headquarters and may be obtained by requestingResearch Report RR:D02-1009.3For referenced ASTM standa
15、rds,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,
16、NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.3 Energy Institute Standard:5IP 71 Determination of Kinematic Viscosity and Calculationof Dynamic Viscosity3.Terminology3.1 Definitions:3.1.1 viscosity index,nan arbitrary number used to char-acterize the variation of the kinematic viscosity of a petroleumproduct with temperature.3.1.1.1 DiscussionFor oils of similar kinematic viscosity,the higher the viscos