Designation:D4986−22StandardTestMethodforHorizontalBurningCharacteristicsofCellularPolymericMaterials1ThisstandardisissuedunderthefixeddesignationD4986;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisfire-test-responsestandardcontainsatestmethodforsmall-scalelaboratoryprocedurestobeusedtodeterminetherelativerateofburningandtheextentandtimeofburningofhorizontallyorientedcellularpolymericmaterialshavingadensitylessthan250kg/m3.1.2Theresultsareintendedtoserveasapreliminaryindicationoftheiracceptabilitywithrespecttoflammabilityforaparticularapplication.Thefinalacceptanceofthematerialisdependentuponitsuseintheend-productthatconformswiththestandardsapplicabletosuchend-product.1.3TheclassificationsystemdescribedintheAppendixX1isintendedforqualityassuranceandthepreselectionofcomponentmaterialsforproducts.1.4Thisstandardmeasuresanddescribestheresponseofmaterials,products,orassembliestoheatandflameundercontrolledconditions,butdoesnotbyitselfincorporateallfactorsrequiredforfirehazardorfireriskassessmentofthematerials,products,orassembliesunderactualfireconditions.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,see6.1.1.1.7Firetestingisinherentlyhazardous.Adequatesafe-guardsforpersonnelandpropertyshallbeemployedinconductingthesetests.NOTE1—ThistestmethodisequivalenttoISO9772.1.8Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,Guidesand...
