ASTM_D_7109_-_12.pdf

Designation:D710912Standard Test Method forShear Stability of Polymer Containing Fluids Using aEuropean Diesel Injector Apparatus at 30 and 90 Cycles1This standard is issued under the fixed designation D7109;the number immediately following the designation indicates the year oforiginal 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.1.Scope*1.1 This test method covers the evaluation of the shearstability of polymer-containing fluids.The test method mea-sures the viscosity loss,in mm2/s and percent,at 100C 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 loss is evaluated after both 30and 90 cycles of shearing.NOTE1This test method evaluates the shear stability of oils after both30 and 90 cycles of shearing.For most oils,there is a correlation betweenresults after 30 cycles and results after 90 cycles of shearing,but this is notuniversal.NOTE2Test Method D6278 uses essentially the same procedure with30 cycles only instead of both 30 and 90 cycles.The correlation betweenresults from this test method at 30 cycles and results from Test MethodD6278 has not been established.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 apparatus 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but may give different results.NOTE6This test method has different calibration and operationalrequirements than withdrawn Test Method D3945.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 This standard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 and health practices and determine the applica-bility of regulatory limitations prior to use.Specific warningstatements are given in Section 8.2.Referenced Documents2.1 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 Test 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 Performance2.2 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,na measure of the resistance toflow of a fluid under gravity.3.2 Definitions of Terms Specific to This Standard:3.2.1 calibration pressure,nthe recorded gauge pressurewhen calibration fluid RL233 undergoes a viscosity loss of 2.7to 2.9 mm2/s when the recorded gauge pressure is within therange of 13.0 to 18.0 MPa.3.2.2 percent viscosity loss,nviscosity loss,as defined in3.2.3,divided by the pre-sheared viscosity,and reported as apercent.3.2.3 viscosity loss,nthe loss in viscosity determined fromthe difference in kinematic viscosity at 100C of pre-shearedand post-sheared fluid.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.Current edition approved Nov.1,2012.Published April 2013.Originallyapproved in 2004.Last previous edition approved in 2007 as D710907.DOI:10.1520/D7109-12.2For 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 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 States1 4.Summary of Test Method4.1 A polymer-containing fluid is passed through a dieselinjector nozzle at a shear rate that may reduce its kinematicviscosity.The percent viscosity loss is a measure of themechanical shear stability of the fluid.NOTE7This te