ASTM_F_708_-_92_2014.pdf

Designation:F70892(Reapproved 2014)An American National StandardStandard Practice forDesign and Installation of Rigid Pipe Hangers1This standard is issued under the fixed designation F708;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice covers acceptable methods of fabricatingand installing rigid pipe hangers used to support shipboardpiping systems with temperatures of 650F(343C)or less.1.2 This practice provides guidance for the design of hangercaps,straps and standoffs,selection of hanger and hanger linermaterials,hanger bolting,and hanger spacing.1.3 Other hanger designs may be used provided they resultin an adequately supported vibration-free piping system andare compatible with the intended system service and tempera-ture limitations.1.4 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.5 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.Referenced Documents2.1 ASTM Standards:2A307 Specification for Carbon Steel Bolts,Studs,andThreaded Rod 60 000 PSI Tensile Strength3.Terminology3.1 Definitions:3.1.1 linerthe material used to isolate a pipe from itshanger.3.1.2 rider bara protective strip of material installedbetween the pipe and the hanger where frequent linear move-ment of the pipe is expected.3.1.3 rigid pipe hangera device that transfers the loadimposed by the piping,insulation,and system medium to thesupporting structure.3.1.4 standoffthe rigid member that connects the hangerstrap,saddle,or band to the supporting structure.A standoff is1This 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 Aug.1,2014.Published September 2014.Originallyapproved in 1981.Last previous edition approved in 2008 as F708 92(2008).DOI:10.1520/F0708-92R14.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 usually made up of one or more pieces of flat bar,pipe,anglebar,or flanged plate to suit a specific location.4.List of Pipe Hanger Styles4.1 This practice incorporates 26 pipe hanger assemblies asshown on Figs.1-12(c)as follows:HangerFig.No.Split cap hanger(single leg standoff)1(a)Split cap hanger(dual leg standoff)1(b)Split cap hanger(chair type)1(c)Strap hanger2(a)Strap hanger(assembled for clearance with rider bar)2(b)Strap hanger(assembled for clearance with TFE-fluorocarbonstrip)2(c)Welded hanger(flat bar U-type)3(a)Welded hanger(round bar U-type)3(b)Welded hanger(square bar U-type)3(b)U-bolt hanger4(a)U-bolt hanger(assembled for clearance with rider bar)4(b)U-bolt hanger(assembled for clearance with TFE-fluorocarbonstrip)4(c)Welded hanger(single leg standoff welded direct to pipe)5(a)Welded hanger(dual leg standoff welded direct to pipe)5(b)“J”band type hanger(insulated pipe)6(a)“J”band type hanger(bare pipe)6(b)Nelson hanger3,47Clamp hanger assembled with mounting channel8Poly-block twin clamp hanger(assembled with welding plate)5,6,49(a)Poly-block twin clamp hanger(assembled with welding stud)5,6,49(b)Poly-block twin clamp hanger(assembled with mountingchannel)5,6,49(c)Crimp-on weld stud-type hangers10Banded weld stud-type hanger11Poly-block single-clamp hanger(assembled with welding plate)4,612(a)Poly-block single-clamp hanger(assembled with welding stud)4,612(b)Poly-block single-clamp hanger(assembled with mountingchannel)4,612(c)5.Hanger Designs5.1 Figs.1-5 and Fig.6(a)hangers are designs generallymanufactured by shipyards or their subcontractors.See alsoTables 1-6.5.2 Fig.6,Fig.8,Fig.10,and Fig.11 hangers are commer-cially available from various vendors.Fig.8,Fig.10,and Fig.11 hangers are primarily designed for use in supportingelectrical cables,but are suitable for hanging small size pipeand tubing.5.2.1 The Fig.7 hanger3,4is a specific design that has beenpatented by Nelson Division of TRW.5.2.2 The Fig.9 and Fig.12 hangers5,6,4are primarilydesigned for use when supporting multiple runs of pipe ortubing.6.Materials and Manufacture6.1 Hanger materials for straps,saddles,and U-bolts forFigs.1-5 hangers and standoffs should be