Designation:D5193/D5193M−93(Reapproved2012)StandardTestMethodforCoatedFabrics—AirRetention1ThisstandardisissuedunderthefixeddesignationD5193/D5193M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesthedeterminationoftheretentionofairbyfabricscoatedononeorbothsideswithrubber.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D751TestMethodsforCoatedFabrics3.SummaryofTestMethod3.1Amembranespecimenofthematerialtobetestedisplacedacrossacircularorificeinthemeasuringapparatus.Thebottomsurfaceofthemembraneisexposedtoasourceofairataspecifiedpressure.Thetopsurfaceofthespecimeniscoveredwithwaterorsoapsolution.Absenceoftheappear-anceofairbubblesonthetopsurfaceofthematerialduringaspecifiedexposureperiodindicatesthelackofpin-holes,leaks,orothersimilardefects.Thecoatedfabricisthenacceptableforuseintheintendedapplication.Thisprocedureislimitedtomembranesorcoatedfabricshavingathicknessoflessthan3mm[0.125in.].4.SignificanceandUse4.1Thistestmethoddescribesaprocedureforevaluatingrubberizedfabricsthatareusedtomanufacturepneumaticarticles(thatis,thosethatmustretainairinordertoperformsatisfactorilyinanintendedapplication).Examplesofsucharticlesareemergencyrafts,lifepreservers,marinerecre-ationalequipment,floats,pontons,andwarningordetectiondevices,suchasbuoyso...
