Designation:F986−86(Reapproved2014)AnAmericanNationalStandardStandardSpecificationforSuctionStrainerBoxes1ThisstandardisissuedunderthefixeddesignationF986;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversthedesign,materials,andconstructionofstrainerboxesforuseinships’bilgesandothersuchtanklocationsthatrequiretrashprotectionforsuctionpipesandpumps.1.2ThisspecificationcoverspipesizesfromNPS11⁄2throughNPS16(seeNote1).NOTE1—ThedimensionlessdesignatorNPS(nominalpipesize)hasbeensubstitutedinthisspecificationforsuchtraditionaltermsas“nominaldiameter,”“size,”and“nominalsize.”1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.2.ReferencedDocuments2.1ASTMStandards:2A36/A36MSpecificationforCarbonStructuralSteelA123/A123MSpecificationforZinc(Hot-DipGalvanized)CoatingsonIronandSteelProductsF593SpecificationforStainlessSteelBolts,HexCapScrews,andStudsF594SpecificationforStainlessSteelNutsF708PracticeforDesignandInstallationofRigidPipeHangers2.2AWSStandard:3AWSD1.3StructuralWeldingCode—SheetSteel3.Classification3.1Thisspecificationcoverstwotypesofstrainerboxes.3.1.1Type1—Strainerboxeswithpipeclampcenteredonthetopofthestrainerbox(seeFig.1).3.1.2Type2—Strainerboxeswiththepipeclampoffcenterinthetopofthestrainerbox(seeFig.2).4.OrderingInformation4.1Orderinginformationrequiredisasfollows.4.1.1ASTMspecificationandyearofissue.4.1.2Type.4.1.3Size(suctionpipeNPS).4.1.4DimensionsGandH(Type2only).4.1.5Numberofeachtypeandsize.5.MaterialsandManufacture5.1Forinformationonmaterials,seeTable1.5.2WeldingshallbeinaccordancewithAWSD1.3.5.3Perforatedsheetmetalshallhave3⁄8-in.diameterholesonstaggered1⁄2-in.centers,51%openarea.6.DimensionsandTolerances6.1Tolerance—61⁄16in.6.2StrainerBoxDimensions:6.2.1Type1—SeeTable2.6.2.2Type2—See...
