Designation:E1646−95(Reapproved2018)StandardTestMethodforWaterPenetrationofExteriorMetalRoofPanelSystemsbyUniformStaticAirPressureDifference1ThisstandardisissuedunderthefixeddesignationE1646;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheresis-tanceofexteriormetalroofpanelsystemstowaterpenetrationwhenwaterisappliedtotheoutdoorfacesimultaneouslywithastaticairpressureattheoutdoorfacehigherthanthepressureattheindoorface,thatis,positivepressure.ThistestmethodisaspecializedadaptionofTestMethodE331.1.2Thistestmethodisapplicabletoanyroofareaandisintendedtomeasureonlythewaterpenetrationassociatedwiththefieldofroofincludingpanelsidelapsandstructuralconnections.Itdoesnotincludeleakageatopeningsorperimeteroranyotherdetails.1.3Thistestmethodislimitedtospecimensinwhichthesideseamsandattachmentsareclearlyvisibleandinwhichthesourceofleakageisreadilydetermined.Compositesystemsinwhichthesourcecannotbereadilydeterminedareoutsidethescopeofthistestmethod.1.4Theproperuseofthistestmethodrequiresaknowledgeoftheprinciplesofpressureandflowmeasurement.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thetextofthistestmethodreferencesnotesandfootnotesexcludingtablesandfigures,whichprovideexplana-torymaterial.Thesenotesandfootnotesshallnotbeconsid-eredasrequirementsofthetestmethod.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,see7.1.1.8Thisinternationalstandardwasd...
