Designation:B280−18StandardSpecificationforSeamlessCopperTubeforAirConditioningandRefrigerationFieldService1ThisstandardisissuedunderthefixeddesignationB280;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thisspecificationestablishestherequirementsforseam-lesscoppertubeintendedforuseintheconnection,repairs,oralternationsofairconditioningorrefrigerationunitsinthefield.NOTE1—FittingsusedforsolderedorbrazedconnectionsinairconditioningandrefrigerationsystemsaredescribedinASMEStandardB16.22.NOTE2—TheassemblyofcoppertubularsystemsbysolderingisdescribedinPracticeB828.NOTE3—SoldersforjoiningcoppertubularsystemsaredescribedinSpecificationB32.TherequirementsforacceptablefluxesforthesesystemsaredescribedinSpecificationB813.1.2Thetubeshallbeproducedfromthefollowingcoppers,andthemanufacturerhastheoptiontosupplyanyoneofthem,unlessotherwisespecified:CopperUNSNo.PreviouslyUsedDesignationDescriptionC10200OFOxygenfreewithoutresidualdeoxidantsC12000DLPPhosphorusdeoxidized,lowresidualphosphorusC12200DHPPhosphorusdeoxidized,highresidualphosphorus1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thefollowinghazardstatementpertainsonlytothetestmethoddescribedin18.2.4ofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenviron-mentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDec...
