Designation:D5641/D5641M−16StandardPracticeforGeomembraneSeamEvaluationbyVacuumChamber1ThisstandardisissuedunderthefixeddesignationD5641/D5641M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversprocedurestoperformnondestruc-tivequalitycontroltestingdescribedinPracticeD4437/D4437MandPracticeD4545forevaluatingthecontinuityofalltypesofgeomembraneseamsusingthebubbleemissionorvacuumchambermethod.1.2Thetechniquedescribedinthispracticeisintendedforuseongeomembraneseams,patches,anddefects.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4437/D4437MPracticeforNon-destructiveTesting(NDT)forDeterminingtheIntegrityofSeamsUsedinJoiningFlexiblePolymericSheetGeomembranesD4439TerminologyforGeosyntheticsD4545PracticeforDeterminingtheIntegrityofFactorySeamsUsedinJoiningManufacturedFlexibleSheetGeomembranes(Withdrawn2008)3E515PracticeforLeaksUsingBubbleEmissionTechniques2.2E.P.A.Documents:EPA/530/SW-91/051InspectionTechniquesfortheFabri-cationofGeomembraneFieldSeams43.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1geomembrane,n—anessentiallyimpermeablegeosyn-theticcomposedofoneormoresyntheticsheets.(SeeTermi-nologyD4439).3.1.2seam,n—theconnectionoftwoormorepiecesofmaterialbymechanical,chemical,orfusionmethodstopro-videtheintegrityofasinglepieceo...
