Designation:D4167−21StandardSpecificationforFiber-ReinforcedPlasticFansandBlowers1ThisstandardisissuedunderthefixeddesignationD4167;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoverscentrifugalandaxialfansandblowerswithairstreamcomponentsfabricatedoffiber-reinforcedthermosetplastics(FRP)forcorrosionresistance.Itisacceptableforinternalstructurestoincludeencapsulatedmetalfasteningdevices,hubs,andshafts.1.2Reinforcingmaterialsotherthanfibrousglassareac-ceptableforuseinthefabrication,providedthefansandblowersproducedmeetalltherequirementsofthisspecifica-tion.1.3Theterm“fans”asusedinthisspecificationincludesfansandblowers,bothcentrifugalandaxial.1.4Thepurposeofthisspecificationistoprovidepurchasers,systemdesigners,specifiers,andsuppliersofFRPfanswithminimumstandardsforfanconstructionandacommonbasisfordeterminingsafeoperatingspeeds.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.NOTE1—ThereisnoknownISOequivalenttothisstandard.NOTE2—AppendixX2containsalistofdocumentspotentiallyofinteresttodesignersoffansystems.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.7Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2C582SpecificationforContact-MoldedReinforcedThermo-settingPlastic(RTP)Laminates...
