Designation:D4551−17AnAmericanNationalStandardStandardSpecificationforPoly(VinylChloride)(PVC)PlasticFlexibleConcealedWater-ContainmentMembrane1ThisstandardisissuedunderthefixeddesignationD4551;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverspoly(vinylchloride)(PVC)flexiblesheetingwhichisusedwithoutmastic,bedding,orcoatingforconstructionofconcealedwater-containment-membranesinapplicationswherethereispotentialforcostlysecondarydamagefromwaterleakageandverylong-termreliableperformanceisessential.Examplesarefountains,pools,planters,showerandsafepans,tiletubs,orsimilarwetinstallationswherethemembraneisinaccessibleoncetheconstructioniscomplete.Includedarerequirementsformate-rialsandsheeting,testmethods,workmanshipcriteria,andmethodsofmarking.1.2RecycledmaterialsmaybeusedinthisproductinaccordancewiththerequirementsinSection5.1.3Thetestsareintendedtoensurequalityandperformanceandarenotintendedfordesignpurposes.Testshavebeenselectedtobeconductedprimarilywithliquidsthatsimulatetheenvironmenttowhichthemembranewillbesubjectedduringactualuse.1.4Thisspecificationdoesnotcoverwater-containmentmembranesexposedtoultravioletlight.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6ThereisnoknownISOequivalenttothisstandard.1.7Thefollowingprecautionarycaveatpertainsonlytothetestmethodportion,Section11,ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenvironmentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.8Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationesta...
