Designation:D7177/D7177M−05(Reapproved2015)´1StandardSpecificationforAirChannelEvaluationofPolyvinylChloride(PVC)DualTrackSeamedGeomembranes1ThisstandardisissuedunderthefixeddesignationD7177/D7177M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—DesignationwaschangedtodualandunitsinformationwascorrectededitoriallyinJune2015.1.Scope1.1ThisspecificationcoversanondestructiveevaluationofthestrengthandcontinuityofparallelPVCgeomembraneseamsseparatedbyanunweldedairchannel.Theunweldedairchannelbetweenthetwodistinctseamedregionsissealedandinflatedwithairtoapredeterminedpressure.Longlengthsofseamcanbeevaluatedbythisspecificationmorequicklythanbyothercommonnondestructivetests.1.2Thisspecificationcanbeusedasasubstitutefordestructivetestingorusedinconjunctionwithdestructivetesting.1.3ThisspecificationcoversPVCsheet0.760mm[0.030in.]andthicker.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4439TerminologyforGeosynthetics3.Terminology3.1Definitions:3.1.1dualseam,n—ageomembraneseamwithtwoparallelweldedzonesseparatedbyanunweldedairspace.3.1.1.1Discussion—Thedualseamitselfcanbemadebyanumberofmethods;hotwedge,hotair,andultrasonicbondingarealltypicaltechniques.3.1.2geomembrane,n—anessentiallyimpermeablegeo-syntheticcomposedofoneormoresyntheticsheets.3.1.3seam,n—apermanen...
