1、Designation:D715211(Reapproved 2016)1Standard Practice forCalculating Viscosity of a Blend of Petroleum Products1This standard is issued under the fixed designation D7152;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially updated Footnote 3 in February 2020.1.Scope1.1 This practice covers the procedures for calculating theestimated kinemat
3、ic viscosity of a blend of two or morepetroleum products,such as lubricating oil base stocks,fuelcomponents,residua with kerosine,crude oils,and relatedproducts,from their kinematic viscosities and blend fractions.1.2 This practice allows for the estimation of the fraction ofeach of two petroleum pr
4、oducts needed to prepare a blendmeeting a specific viscosity.1.3 This practice may not be applicable to other types ofproducts,or to materials which exhibit strong non-Newtonianproperties,such as viscosity index improvers,additivepackages,and products containing particulates.1.4 The values stated in
5、 SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 Logarithms may be either common logarithms or naturallogarithms,as long as the same are used consistently.Thispractice uses common logarithms.If natural logarithms areused,the inverse function,exp(
6、),must be used in place of thebase 10 exponential function,10,used herein.1.6 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-priate safety,health,and environmental practices an
7、d todetermine the applicability of regulatory limitations prior touse.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-m
8、endations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D341 Practice for Viscosity-Temperature Charts for LiquidPetroleum ProductsD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of
9、Dynamic Viscos-ity)D7042 Test Method for Dynamic Viscosity and Density ofLiquids by Stabinger Viscometer(and the Calculation ofKinematic Viscosity)2.2 ASTM Adjuncts:Calculating the Viscosity of a Blend of Petroleum ProductsExcel Worksheet33.Terminology3.1 Definitions of Terms Specific to This Standa
10、rd:3.1.1 ASTM Blending Method,na blending method atconstant temperature,using components in volume percent.3.1.2 blend fraction,nthe ratio of the amount of a com-ponent to the total amount of the blend.Blend fraction may beexpressed as mass percent or volume percent.3.1.3 blending method,nan equatio
11、n for calculating theviscosity of a blend of components from the known viscositiesof the components.3.1.4 dumbbell blend,na blend made from components ofwidely differing viscosity.3.1.4.1 Examplea blend of S100N and Bright Stock.3.1.5 inverse blending method,nan equation for calculat-ing the predict
12、ed blending fractions of components to achievea blend of given viscosity.3.1.6 mass blend fraction,nThe ratio of the mass of acomponent to the total mass of the blend.3.1.7 McCoull-Walther-Wright Function,na mathematicaltransformation of viscosity,generally equal to the logarithm of1This practice is
13、 under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.07 on Flow Properties.Current edition approved Jan.1,2016.Published February 2016.Originallyapproved in 2005.Last previous edition approved in 2011 as
14、D7152 11.DOI:10.1520/D7152-11R16E01.2For referenced ASTM standards,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.3Available from ASTM Internati
15、onal Headquarters.Order Adjunct No.ADJD7152-EA.Original adjunct produced in 2006.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardi
16、zation established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.the logarithm of kinematic viscosity plus a constant,lo-glog(v+0.7).For viscosities below 2 mm2/s,additional termsare added to improve accuracy.3.1.8 modified ASTM Blending Method,na blendingmethod at constant temperature,using components in masspercent.3.1.9 modified Wright Blending Method,na bl
