ASTM_F_986_-_86_2014.pdf

Designation:F98686(Reapproved 2014)An American National StandardStandard Specification forSuction Strainer Boxes1This standard is issued under the fixed designation F986;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the design,materials,andconstruction of strainer boxes for use in ships bilges and othersuch tank locations that require trash protection for suctionpipes and pumps.1.2 This specification covers pipe sizes from NPS 112through NPS 16(see Note 1).NOTE1The dimensionless designator NPS(nominal pipe size)hasbeen substituted in this specification for such traditional terms as“nominaldiameter,”“size,”and“nominal size.”1.3 The values stated in inch-pound units are to be regardedas the standard.2.Referenced Documents2.1 ASTM Standards:2A36/A36M Specification for Carbon Structural SteelA123/A123M Specification for Zinc(Hot-Dip Galvanized)Coatings on Iron and Steel ProductsF593 Specification for Stainless Steel Bolts,Hex CapScrews,and StudsF594 Specification for Stainless Steel NutsF708 Practice for Design and Installation of Rigid PipeHangers2.2 AWS Standard:3AWS D1.3 Structural Welding CodeSheet Steel3.Classification3.1 This specification covers two types of strainer boxes.3.1.1 Type 1Strainer boxes with pipe clamp centered onthe top of the strainer box(see Fig.1).3.1.2 Type 2Strainer boxes with the pipe clamp off centerin the top of the strainer box(see Fig.2).4.Ordering Information4.1 Ordering information required is as follows.4.1.1 ASTM specification and year of issue.4.1.2 Type.4.1.3 Size(suction pipe NPS).4.1.4 Dimensions G and H(Type 2 only).4.1.5 Number of each type and size.5.Materials and Manufacture5.1 For information on materials,see Table 1.5.2 Welding shall be in accordance with AWS D1.3.5.3 Perforated sheet metal shall have38-in.diameter holeson staggered12-in.centers,51%open area.6.Dimensions and Tolerances6.1 Tolerance6116in.6.2 Strainer Box Dimensions:6.2.1 Type 1See Table 2.6.2.2 Type 2See Table 3.7.Workmanship,Finish,and Appearance7.1 Strainer boxes shall be hot galvanized in accordancewith Specification A123/A123M after fabrication.The galva-nizing shall be a minimum of 2 mils thick.7.2 Strainer boxes shall be free of defects,burrs,and sharpedges.8.Installation8.1 Strainer boxes are normally installed on suction pipes inballast and bilge spaces.8.2 Minimum suction pipe or tank bottom clearances areindicated in Column“F”in Table 2 and Table 3.Dimensioncallout is based on12 the tailpipe nominal pipe size.8.3 Tank structure and sloping bottom structure may ob-scure the above clearance down to the limit of the resultingperiphery clear area,being 1.5 the inside diameter of thetailpipe.Structure outside the limit of12the pipe NPS need notbe considered as obstructing flow.1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved Aug.1,2014.Published September 2014.Originallyapproved in 1986.Last previous edition approved in 2008 as F986 86(2008).DOI:10.1520/F0986-86R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Welding Society(AWS),550 NW LeJeune Rd.,Miami,FL 33126,http:/www.aws.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE1Tab location to suit perforated holes.FIG.1 Type 1Elevation Strainer BoxF986 86(2014)2 FIG.2 Type 2Elevation Rectangular StrainerTABLE 1 Parts ListItem NumberDescription1SideSheet metal,11 gage,perforated38-in.diameter holes staggered on12-in.centers,carbonsteel,Specification A36/A36M.2TopSheet metal,11 gage,perforated38-in.diam-eter holes staggered on12-in.centers,carbon steel,Specification A36/A36M.3TabFlatbar,14in.thick by 1 in.wide by 2 in.long,carbon steel,Specification A36/A36M or ABSGrade A.4ScrewTapping,plain hexagon washer head14nominal size by34in.long,Type 316 stainlesssteel,Specification F593.5ClampSplit cap,Practice F708 Fig.1a,withoutstandoff.6BoltHexagon head,stainless steel,Type 316Specification F593.Size in accordance withPractice F708.7NutHexagon heavy,stainless steel,Type 316Specification F594.Size in accordance withPractice F708.F986 86(2014)3 TABLE 2 Type 1 Strainer DimensionsFlat Surface InstallationABCDEFASuctionPipeNPSStrainerSideWidth,in.StrainerLength,in.StrainerHeight,in.HoleDiameter,in.TabLocation,in.PipeClearance,in.Weight,lb112886115163347.328862716317.52128862151631148.43141463916311214.341414649163214.9520206558321222.862020661116