Designation:D6326−22StandardPracticeforSelectionofMaximumTransit-RateRatiosandDepthsfortheU.S.SeriesofIsokineticSuspended-SedimentSamplers1ThisstandardisissuedunderthefixeddesignationD6326;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthemaximumtransit-rateratiosanddepthsforselectedsuspended-sedimentsampler-nozzle-containerconfigurations.1.2Thispracticeexplainsthereasonsforlimitingthetransit-rateratioanddepthsthatsuspended-sedimentsamplerscanbecorrectlyused.1.3Thispracticegivemaximumtransit-rateratiosanddepthsforselectedisokineticsuspended-sedimentsampler/nozzle/containersizeforsamplersdevelopedbytheFederalInteragencySedimentationProject.1.4Throughoutthispractice,asamplersloweringrateisassumedtobeequaltoitsraisingrate.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD4410TerminologyforFluvialSedimentD4411GuideforSamplingFluvialSedimentinMotion3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthispractice,refertoTerminologyD1129andTerminologyD4410.3.2DefinitionsofTermsSpecifictoThisStan...
