Designation:D7718−11(Reapproved2019)StandardPracticeforObtainingIn-ServiceSamplesofLubricatingGrease1ThisstandardisissuedunderthefixeddesignationD7718;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthemethodtoobtainatrendablein-servicelubricatinggreasesamplefromthefollowingcon-figurationsincludingmotor-operatedvalves,gearboxes,pillow-blockbearings,electricmotors,exposedbearings,opengears,orfailedgrease-lubricatedcomponents.1.2Insomecases,itmaybenecessarytotakemorethanonesamplefromapieceofequipmenttoobtainmoretrendableresults.Examplesofthiscouldbealargebearingthatdoesnotfullyrotate,suchasaslewbearing,oroneinwhichsufficientmixingdoesnototherwiseoccur.1.3Samplestakenintheabovemannermayneedtobemixedtoformamorehomogeneoussample.Thismayalsobetrueofothersamplessuchasthosetakenfromopenfacebearings.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.TheexceptiontothisisastandardEnglishunitsthreadforwhichthereisnometricequivalent.NOTE1—Thestandardpipethreadreferredtoisthenationalpipethreadtaperedthread.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D217TestMethodsforConePenetrationofLubricatingGreaseD4057PracticeforManualSamplingofPetroleumandPetroleumProducts2....
