Designation:F1139−88(Reapproved2015)AnAmericanNationalStandardStandardSpecificationforSteamTrapsandDrains1ThisstandardisissuedunderthefixeddesignationF1139;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecification2providestheminimumrequirementsforthedesign,fabrication,pressurerating,marking,andtestingofsteamtrapsanddrains.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodportionofthisspecification.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ANSIStandards:3B16.1CastIronPipeFlangesandFlangedFittingsB16.3Malleable-IronScrewedFittingsB16.4Cast-IronScrewedFittingsB16.5SteelPipeFlangesandFlangedFittingsB16.11ForgedSteelFittingsSocket-WeldingandThreadedB16.15CastBronzeScrewedFittingsB16.18CastBronzeSolder-JointPressureFittingsB16.22WroughtCopperandBronzeSolder-JointPressureFittingsB16.24BronzeFlangesandFlangedFittingsB16.34SteelValves,FlangedandButtweldEndsB31.1PowerPiping2.2MSSStandards:4SP-25StandardMarkingSystemforValves,Fittings,Flanges,andUnionsSP-51150lbCorrosionResistingCastFlangesandFlangedFittings2.3ASMEStandards:5ANSI/ASMEPTC39.1CondensateRemovalDevicesforSteamSystemsASMEBoilerandPressureVesselCode,SectionVIIIDivi-sionI,PressureVesselsASMEBoilerandPressureVesselCode,SectionIX,Wel-dingandBrazingQualifications3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1coldcondensatecapacity(QC)—maximummassofcondensatethatthesteamtr...
