Designation:F957−91(Reapproved2012)AnAmericanNationalStandardStandardSpecificationforGong,SoundSignaling1ThisstandardisissuedunderthefixeddesignationF957;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversgongsforuseonships100mormoreinlength,asrequiredbyInternationalRegulations(seeAppendixX1).1.2ForconsistencywithInternationalRegulations,allmea-surementsareinSIunits.2.ReferencedDocuments2.1ASTMStandards:2A167SpecificationforStainlessandHeat-ResistingChromium-NickelSteelPlate,Sheet,andStrip(With-drawn2014)3A276SpecificationforStainlessSteelBarsandShapesD3951PracticeforCommercialPackaging2.2AmericanWeldingSocietyStandard:4AWSD1.1StructuralWeldingCode2.3FederalSpecifications:5PPP-B-576Box,Wood,Cleated,Veneer,PaperOverlaidPPP-B-585Boxes,Wood,WireboundPPP-B-591Boxes,Fiberboard,Wood-cleatedPPP-B-601Boxes,Wood,CleatedPlywoodPPP-B-621Boxes,Wood,NailedandLockCorner2.4MilitaryStandard:5MIL-STD-129MarkingforShipmentandStorage3.OrderingInformation3.1Ordersforgongsunderthisspecificationshallincludethefollowinginformation:3.1.1ASTMdesignationandyearofissue.3.1.2Numberofgongs.3.1.3Packagingandmarking,ifotherthancommercial.4.MaterialsandManufacture4.1Materials:4.1.1Thegongcylinder,brackets,clapperrod,“U”bracket,washers,andclappersupportpinshallbeofstainlesssteel,inaccordancewithSpecificationA167,UNSnumberS31600.4.1.2TheclappermassshallbeofcastalloysteelinaccordancewithSpecificationA276,UNSS31600.4.1.3Thesupportbolt,nut,flatwasher,andcotterpinsshallbeofstainlesssteelcompatiblewiththeothermaterials.4.2Welding:4.2.1WeldingshallbeofthetypeandsizesshowninFig.1andFig.2,andinaccordancewithStandardAWSD1.1.4.3Manufacture:4.3.1Fig.1showsthegeneralarrangementoftheassembledgong,aswe...
