Designation:F1431−92(Reapproved2016)AnAmericanNationalStandardStandardSpecificationforWaterTrapforDieselExhaust1ThisstandardisissuedunderthefixeddesignationF1431;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversthematerial,dimensions,andconstructionofdieselexhaustwatertraps,whichshallberequiredwhenevertheexhaustistobeexpelledthroughthehullofthevessel.1.2Thetrapsaredesignedtopreventseabackwashfromenteringthedieselexhaustsystem.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.2.ReferencedDocuments2.1ASTMStandards:2B443SpecificationforNickel-Chromium-Molybdenum-ColumbiumAlloy(UNSN06625)andNickel-Chromium-Molybdenum-SiliconAlloy(UNSN06219)Plate,Sheet,andStripF104ClassificationSystemforNonmetallicGasketMateri-als2.2MilitaryStandard:3MIL-S-901RequirementsforShockTests,HighImpact,ShipboardMachinery,EquipmentandSystems2.3OtherDocuments:ABSRulesforBuildingandClassingSteelVessels4AWSD1.1StructuralWeldingCode53.OrderingInformation3.1Watertrapsorderedunderthisspecificationshallin-cludethefollowinginformation:3.1.1ASTMdesignation,titleanddateofthisspecification,3.1.2Quantity,3.1.3Size,3.1.4Shocktestandgrade(seeSupplementaryRequirementS1),3.1.5Handholeshallbeat45°unlessotherwisespecified,and3.1.6Flangedimensionsshallbeindicatedforgaskets.4.MaterialsandManufacture4.1Materials:4.1.1Thetankandbafflesshallbeofnickel-chromium-molybdenum-columbiumalloyandtestedinaccordancewithSpecificationB443.4.1.2Gaskets—GasketsshallbeASTMClassificationF104(F712100–A9B4–E22K5M6)andshallwithstandtemperaturesof650°C(1200°F).4.2Manufacture:4.2.1ConstructionofthewatertrapsshallbeinaccordancewiththisspecificationandFig.1.4.2....
