Designation:D4516−19aStandardPracticeforStandardizingReverseOsmosisPerformanceData1ThisstandardisissuedunderthefixeddesignationD4516;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthestandardizationofpermeateflow,saltpassage,andcoefficientofperformancedataforreverseosmosis(RO)systems.1.2Thispracticeisapplicabletowatersincludingbrackishwatersandseawatersbutisnotnecessarilyapplicabletowastewaters.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD4194TestMethodsforOperatingCharacteristicsofRe-verseOsmosisandNanofiltrationDevicesD6161TerminologyUsedforMicrofiltration,Ultrafiltration,Nanofiltration,andReverseOsmosisMembraneProcesses3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthisstandard,refertoTerminologiesD1129andD6161.3.1.2FordescriptionoftermsrelatingtoRO,refertoTestMethodsD4194andTerminologyD6161.4.SummaryofPractice4.1Thispracticeconsistsofcalculatingthepermeateflow,saltpassageofROsystems,andcoefficientofperformanceofROatastandardsetofconditionsusingdataobtainedatactualoperatingconditions.5.SignificanceandUse5.1DuringtheoperationofanROsystem,systemcondi-tions...
