ASTM_F_1005_-_91_2013.pdf

Designation:F100591(Reapproved 2013)An American National StandardStandard Practice forHVAC Duct Shapes;Identification and Description of DesignConfiguration1This standard is issued under the fixed designation F1005;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the identification of design configu-rations and descriptive nomenclature for sheetmetal HVACductwork shapes frequently used in shipbuilding.This practicealso covers parametric dimensions of these shapes.(See Table1.)1.2 This practice does not cover the location of seams orjoints within a shape or the method of joining shapes together.1.3 Since this practice is not measurement sensitive,it isapplicable whether inch-pound or SI metric dimensions areused.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Terminology2.1 Definitions of Terms Specific to This Standard:2.1.1 branchportion of a duct system connection to amain duct.2.1.2elbowa fitting used to change direction of air flow.2.1.3 flat ovalcross section that has flat sides and semicir-cular ends.2.1.4 long axis of flat oval curved so that the flat sides of theflat oval remain in a plane.2.1.5 offsetfitting that changes the location of the ductwith the line of the duct remaining parallel.2.1.6 ogeea smoothly curved type of offset.The insidecurve of each end is tangent to the outside curve of the otherend.2.1.7 radius cornercross section that is generallyrectangular,but with the corners softened to a radius.2.1.8 rectangularrectangular or square cross section.2.1.9 reducera fitting that changes the size but not thecross-section type of duct.2.1.10 roundcircular cross section.2.1.11 short axis of flat ovalcurved so that the flat sides ofthe flat oval correspond to the curve.2.1.12 splitterinternal part of some elbows and offsets;sometimes required in diverging transitions.Used to providemore uniform velocity and distribution of air flow.The numberand location of splitters is determined by calculation or from anomograph.2.1.13 straightduct that remains constant in cross sectionand size throughout its length.2.1.14 throatwrapper around the inside of a fitting.2.1.15 transitionfitting that changes the cross-section typeof the duct.2.1.16 vaneinternal part of vaned turns.Used to providemore uniform velocity of air flow.Configuration,number,andlocation of vanes is determined from drawing,NAVSHIPS No.S3801-385260.2The direction of airflow must be marked onvaned turns.2.1.17 vaned turna fitting containing vanes that is used tochange the direction of air flow.2.2 Variables Specific to This Standard:AAngle.Included angle of an elbow,branch,vaned turn,or slant-top fitting.AIAir In indicates the length of the straight portion of avaned turn in the“air in-flow”side.AOAir Out indicates the length of the straight portion ofa vaned turn on the“air out-flow”side.BDistance from the intersection of the center lines of abranch and the main duct to the end of the main duct.CYDistance between centers of a Y branch.DDepth of a part.DBDepth of a branch.1This practice is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved Oct.1,2013.Published October 2013.Originallyapproved in 1986.Last previous edition approved in 2007 as F1005-91(2007).DOI:10.1520/F1005-91R13.2Drawing:Naval Sea Systems Command(NAVSEA)NAVSHIPS S3801-385260 Vanes Channels Ventilation Vane,available from Commander,PortsmouthNaval Shipyard,Naval Engineering Drawing Support Activity,Code 202.2,Portsmouth,NH 03804-5000.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 DIADiameter of a part.DIABDiameter of a branch.DIA1Major diameter of a part.DIA2Minor diameter of a part.D1Major depth of a part.D2Minor depth of a part.FFlat section that softens the corner of a vaned turn.LLength of a part.LBLength of a branch from the end of the branch to thepoint where the centerline of the branch intersects the center-line of the main duct.1.1Major length of a Y branch.1.2Minor length of a Y branch.OOffset in one direction.RRadius of a bellmouth.RCRadius corner.RV1Radius of first splitter at V extension.RV2Radius of second splitter at V extension.RV3Radius of third splitter at V extension.RZ1Radius of first splitter at Z extension.RZ2Radius of second splitter at Z extension.RZ3Radius of third splitter at Z extension.R1Radius of first splitter.R2Radius of second splitter.R3Radius of