Designation:D4618−92(Reapproved2017)StandardSpecificationforDesignandFabricationofFlueGasDesulfurizationSystemComponentsforProtectiveLiningApplication1ThisstandardisissuedunderthefixeddesignationD4618;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversthedesignandfabricationofmetalcomponentsforfluegasdesulfurization(FGD)equipment,includingabsorbers,tanks,chimneyliners,duct-workandassociatedequipmentthataretobelinedforcorrosionorabrasionresistance,orboth.1.2Limitations:1.2.1ThisspecificationisintendedonlytodefinethedesignconsiderationsforsuccessfulapplicationandperformanceofprotectiveliningsforFGDsystemcomponents.1.2.2ItdoesnotcoverstructuralperformanceofFGDcomponents.1.2.3Itdoesnotcoveruseofmetalliclinings.1.3Thisspecificationrepresentstheminimumrequirementsforliningwork.Incasesinwhichthemanufacturer’sinstruc-tionsandrecommendationsdifferfromthisspecification,thesedifferencesshallberesolvedbeforefabricationisstarted.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,healthandenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.Design/EngineeringRequirements2.1Rigidity:2.1.1Thecomponentsshallbedesignedsothattheinteriormetalsu...
