Designation:D4279−95(Reapproved2022)StandardTestMethodsforWaterVaporTransmissionofShippingContainers—ConstantandCycleMethods1ThisstandardisissuedunderthefixeddesignationD4279;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverthedeterminationofwatervaportransmissionratesforbulkshippingcontainers,asfollows:1.1.1MethodA,forReclosableContainers,and1.1.2MethodB,forContainersNotDesignedforReclos-ing.1.2Withineachproceduredetailsaregivenfortheconstantandcyclemethodsoftestatmosphere.1.3Thetestmaybeappliedtothecontaineraspacked,orafteroneormoreperformancetestssuchasdrum(MethodD782),vibration(MethodsD999),drop(TestMethodD5276),impactresistance(TestMethodsD880,D4003,andD5277),orperformancetests(PracticeD4169),asrequired.1.4Forsmallshippingcontainersrequiringgreateraccuracyinweighing,thewatervaportransmissionmaybedeterminedinaccordancewithTestMethodD895orTestMethodD1251.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D782TestMethodforShippingContainersinRevolvingHexagonalDrum(Withdrawn1999)3D880TestMethodforImpactTestingforShippingConta...
