Designation:C553−13StandardSpecificationforMineralFiberBlanketThermalInsulationforCommercialandIndustrialApplications1ThisstandardisissuedunderthefixeddesignationC553;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoverstheclassification,composition,physicalproperties,anddimensionsofmineralfiber(rock,slag,orglass)blanketintendedforuseasthermalinsulationonsurfacesoperatingattemperaturesbetween0°F(-18°C)and1200°F(649°C).Forspecificapplications,theactualtempera-turelimitsshallbeagreeduponbetweenthesupplierandthepurchaser.1.2Theorientationofthefiberswithintheblanketisprimarilyparalleltotheprincipalsurface(face).Thisspecifi-cationdoesnotcoverfabricatedpipeandtankwrapinsulationwheretheinsulationhasbeencutandfabricatedtoprovideafiberorientationthatisperpendiculartothesurface(face).1.3Forsatisfactoryperformance,properlyinstalledprotec-tivevaporretardersmustbeusedinbelowambienttemperatureapplicationstoreducemovementofwatervaporthroughoraroundtheinsulationtowardsthecoldersurface.Failuretouseavaporretardercanleadtoinsulationandsystemdamage.RefertoPracticeC921toaidmaterialselection.Althoughvaporretardersarenotpartofthisspecification,propertiesrequiredinSpecificationC1136arepertinenttoapplicationorperformance.1.4Thisstandarddoesnotpurporttoprovidetheperfor-mancerequirementsofhourly-ratedfiresystems.Consultthemanufacturerfortheappropriatesystem.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcernsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesaf...
