1、Designation:D710922Standard Test Method forShear Stability of Polymer-Containing Fluids Using aEuropean Diesel Injector Apparatus at 30 Cycles and 90Cycles1This standard is issued under the fixed designation D7109;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.1.Scope*1.1 This test method covers the evaluation of the shearstability of polymer-containin
3、g fluids.The test method mea-sures the viscosity loss,in mm2/s and percent,at 100 C ofpolymer-containing fluids when evaluated by a diesel injectorapparatus procedure that uses European diesel injector testequipment.The viscosity loss reflects polymer degradation dueto shear at the nozzle.Viscosity
4、loss is evaluated after both30 cycles and 90 cycles of shearing.NOTE1This test method evaluates the shear stability of oils after both30 cycles and 90 cycles of shearing.For most oils,there is a correlationbetween results after 30 cycles and results after 90 cycles of shearing,butthis is not univers
5、al.NOTE2Test Method D6278 uses essentially the same procedure with30 cycles but without the 90 cycles portion of the test.The correlationbetween results from this test method at 30 cycles and results from TestMethod D6278 has been established and shown in Research ReportRR:D02-1629 to be equivalent.
6、NOTE3Test Method D2603 has been used for similar evaluation ofshear stability;limitations are as indicated in the significance statement.No detailed attempt has been undertaken to correlate the results of this testmethod with those of the sonic shear test method.NOTE4This test method uses test appar
7、atus as defined in CECL-14-A-93.This test method differs from CEC-L-14-A-93 in the period oftime required for calibration.NOTE5Test Method D5275 also shears oils in a diesel injectorapparatus but may give different results.NOTE6This test method has different calibration and operationalrequirements t
8、han withdrawn Test Method D3945.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated wi
9、th its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific warning statements are given in Section 8.1.4 This international standard was developed
10、 in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1
11、 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D2603 Test Method for Sonic Shear Stability of Polymer-Containing OilsD5275 Test Method for Fuel Injector Shear Stability Test(FISST)for Polymer Containing FluidsD6278 Tes
12、t Method for Shear Stability of Polymer Contain-ing Fluids Using a European Diesel Injector ApparatusD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD7042 Test Method for Dynamic Viscosity and Density ofLiqu
13、ids by Stabinger Viscometer(and the Calculation ofKinematic Viscosity)2.2 Coordinated European Council(CEC)Standard:CEC L-14-A-93 Evaluation of the Mechanical Shear Stabil-ity of Lubricating Oils Containing Polymers33.Terminology3.1 Definitions:3.1.1 kinematic viscosity,nthe ratio of the dynamic vis
14、-cosity()to the density()of a liquid at a given temperature.3.2 Definitions of Terms Specific to This Standard:1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.07 on Flow Properties.
15、Current edition approved May 1,2022.Published May 2022.Originallyapproved in 2004.Last previous edition approved in 2020 as D7109 20a.DOI:10.1520/D7109-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStan
16、dards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from CEC Secretariat,Interlynk Administrative Services,Ltd.,LynkHouse,17 Peckleton Lane,Desford,Leicestershire,LE9 9JU,United Kingdom.*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 StatesThis international standard was developed in accordance with internationally recognized princ
