Designation:D5820−95(Reapproved2018)StandardPracticeforPressurizedAirChannelEvaluationofDual-SeamedGeomembranes1ThisstandardisissuedunderthefixeddesignationD5820;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversanondestructiveevaluationofthecontinuityofparallelgeomembraneseamsseparatedbyanunweldedairchannel.Theunweldedairchannelbetweenthetwodistinctseamedregionsissealedandinflatedwithairtoapredeterminedpressure.Longlengthsofseamcanbeevaluatedbythispracticemorequicklythanbyothercommonnonde-structivetests.1.2Thispracticeshouldnotbeusedasasubstitutefordestructivetesting.Usedinconjunctionwithdestructivetesting,thismethodcanprovideadditionalinformationregard-ingtheseamsundergoingtesting.1.3ThispracticesupercedesPracticeD4437/D4437Mforgeomembraneseamsthatincludeanairchannel.PracticeD4437/D4437Mmaycontinuetobeusedforothertypesofseams.Theuserisreferredtothereferencedstandards,ortoEPA/530/SW-91/051foradditionalinformationregardinggeomembraneseamingtechniquesandconstructionqualityassurance.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4437/D4437MPracticeforNondestructiveTesting(NDT)forDeterminingtheIntegrityofSeamsUsedinJoiningFlexiblePolymericSheetGeomembranesD4439TerminologyforGeosyntheticsD4491/D4491MTestMethods...
