Designation:D4743–92(Reapproved1996)StandardTestMethodforEfficacyofSolventSystemsforDissolvingWater-FormedDeposits1ThisstandardisissuedunderthefixeddesignationD4743;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheefficacyofsolventsystemsfordissolvingeitherwater-formeddepositsthathavebeenremovedfromtheunderlyingmaterialorsyntheticallyprepareddeposits.1.2Thenatureofthistestmethodissuchthatstatementsofprecisionandbiasasdeterminedbyroundrobintestscouldmisleadusersofthetestmethod(seeSections11and12).Therefore,noprecisionandbiasstatementsaremade.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D887PracticesforSamplingWater-FormedDeposits2D1129TerminologyRelatingtoWater3D1193SpecificationforReagentWater3D2777PracticeforDeterminationofPrecisionandBiasofApplicableMethodsofCommitteeD-19onWater3D2790MethodsofAnalysisofSolventSystemsUsedforRemovalofWater-FormedDeposits4D3263TestMethodsforCorrosivityofSolventSystemsforRemovingWater-FormedDeposits2D3483TestMethodsforAccumulatedDepositioninaSteamGeneratorTube23.Terminology3.1Definitions:3.1.1water-formeddeposits(Note1)—anyaccumulationofinsolublematerialderivedfromwaterorformedbythereactionofwateruponthesurfaceincontactwiththewater.NOTE1—Depositsformedfromorbywaterinallitsphasesmaybefurtherclassifiedasscale,sludge,corrosionproducts,orbiologicaldeposits.Theoverallcompositionofadepositorsomepartofadepositmaybedeterminedbychemicalorspectrographicanalysis;theconstitu-entsactuallypresentaschemicalsubstancesmaybeidentifiedbymicroscopeorX-raydiffractio...
