1、Designation:D771811Standard Practice forObtaining In-Service Samples of Lubricating Grease1This standard is issued under the fixed designation D7718;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number i
2、n parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the method to obtain a trendablein-service lubricating grease sample from the following con-figurations including motor-operat
3、ed valves,gearboxes,pillow-block bearings,electric motors,exposed bearings,opengears,or failed grease-lubricated components.1.2 In some cases,it may be necessary to take more than onesample from a piece of equipment to obtain more trendableresults.Examples of this could be a large bearing that does
4、notfully rotate,such as a slew bearing,or one in which sufficientmixing does not otherwise occur.1.3 Samples taken in the above manner may need to bemixed to form a more homogeneous sample.This may also betrue of other samples such as those taken from open facebearings.1.4 The values stated in SI un
5、its are to be regarded as thestandard.The values given in parentheses are for informationonly.The exception to this is a standard English units thread forwhich there is no metric equivalent.NOTE1The standard pipe thread referred to is the national pipe threadtapered thread.1.5 This standard does not
6、 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.2.Referenced Documents2.1 ASTM Standards:2D2
7、17 Test Methods for Cone Penetration of LubricatingGreaseD4057 Practice for Manual Sampling of Petroleum andPetroleum Products2.2 ANSI/ASME Standard:3B1.20.1 Pipe Threads,General Purpose(Inch)3.Terminology3.1 Definitions:3.1.1 active grease-sampling device,ndevice designed totake an active sample of
8、 a lubricating grease from a bearing,gear,or drive shaft located in a grease-lubricated component.3.1.2 active sampling,vto use a sampling device toactively gather an in-service lubricating grease sample from agrease-lubricated component.3.1.3 actuate,vto hold the interior cylinder of the activegrea
9、se-sampling device while pushing the exterior cylinderforward toward the grease-lubricated component that is beingsampled allowing lubricating grease to fill the sampling device.3.1.4 extension rod,ntool used to extend the depth atwhich a sample is taken with an active grease-sampling device.3.1.4.1
10、 DiscussionThe extension rod may also be used toremotely actuate an active grease-sampling device.3.1.5 in-service lubricating grease,nlubricating greasethat has been applied as a lubricant to a gear,bearing,or drivescrew for any period of time.3.1.6 lubricating grease,nsemi-fluid to solid product o
11、f adispersion of a thickener in a liquid lubricant.3.1.6.1 DiscussionThe dispersion of the thickener forms atwo-phase system and immobilizes the liquid lubricant bysurface tension and other physical forces.Other ingredients arecommonly included to impart special properties.D2173.1.7 passive grease-s
12、ampling device,ndevice designedto gather a sample from the equipment by being attached to thegrease reservoir at the purge point.3.1.7.1 DiscussionThis device has also been designed tocontain a lubricating grease sample that has been gathered withother methods.3.1.8 passive sampling,vto use a passiv
13、e grease-samplingdevice to collect a purged sample of in-service lubricatinggrease from a purge path.1This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.G0 on Lubricating Grease.Current
14、edition approved May 1,2011.Published May 2011.DOI:10.1520/D771811.2For 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
15、.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.9 trendable,adjsample of in-service lubricatinggrease used to tr
16、end the physical properties,wear levels,andcontaminants in a grease-lubricated component.4.Significance and Use4.1 This practice is typically used to obtain in-servicelubricating grease samples from machinery.4.2 In this practice,a consistent and repeatable method isoutlined for obtaining trendable samples from the followingapplications including motor-operated valves,gearboxes,pillow-block bearings,electric motors,exposed bearings,opengears,or failed grease-lubricated components.This allows for
