1、Designation:D791817aStandard Test Method forMeasurement of Flow Properties and Evaluation of Wear,Contaminants,and Oxidative Properties of LubricatingGrease by Die Extrusion Method and Preparation1This standard is issued under the fixed designation D7918;the number immediately following the designat
2、ion 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 determinatio
3、n and evalua-tion of flow properties,wear levels,contaminants,and oxida-tive condition of new and in-service lubricating grease.1.2 This test method provides guidance on evaluating in-service grease samples,NLGI grades 00 to 3,for wear,consistency,contamination,and oxidation.1.3 The values stated in
4、 SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3.1 ExceptionThe exception to this will be where unitsof references were developed by the developers of the testequipment and necessary to report the results of the test.1.4 This standard does not p
5、urport 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 and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard
6、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-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced
7、 Documents2.1 ASTM Standards:2D217 Test Methods for Cone Penetration of LubricatingGreaseD6595 Test Method for Determination of Wear Metals andContaminants in Used Lubricating Oils or Used HydraulicFluids by Rotating Disc ElectrodeAtomic Emission Spec-trometryD7527 Test Method for Measurement of Ant
8、ioxidant Con-tent in Lubricating Greases by Linear Sweep VoltammetryD7546 Test Method for Determination of Moisture in Newand In-Service Lubricating Oils andAdditives by RelativeHumidity SensorD7718 Practice for Obtaining In-Service Samples of Lubri-cating GreaseD7843 Test Method for Measurement of
9、Lubricant Gener-ated Insoluble Color Bodies in In-Service Turbine Oilsusing Membrane Patch ColorimetryE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:
10、3.1.1 active grease sampling device,ndevice designed totake an active sample of a lubricating grease from a bearing,gear,or drive shaft located in a grease lubricated component.D77183.1.1.1 DiscussionThe Grease Thief(trademarked)Type23is a tool which meets this description and can be used toobtain a
11、n active grease sample from a lubricated component.Afull description and dimensions of this device can be found inAnnex A2.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.96.07 on I
12、ntegrated Testers,Instrumentation Techniques forIn-Service Lubricants.Current edition approved Nov.15,2017.Published December 2017.Originallyapproved in 2015.Last previous edition approved in 2017 as D7918 17.DOI:10.1520/D7918-17A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,or
13、contact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The Grease Thief Type I and Type II is described in US Patent No.7984661.Interested parties are invited to submit information regardin
14、g the identification of analternative(s)to this patented item to the ASTM International Headquarters.Yourcomments will receive careful consideration at a meeting of the responsibletechnical committee,which you may attend.The sole source of the Grease ThiefType I and Type II are known to the committe
15、e is York Laboratories,LLC locatedat 410 Kings Mill Rd.,York,PA 17401.If you are aware of alternative suppliers,please provide this information to ASTM International Headquarters.Your com-ments will receive careful consideration at a meeting of the responsible technicalcommittee,1which you may atten
16、d.*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 principles on standardization 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.1 3.1.2 act
