ASTM F708-1992(2018)e1 Standard Practice for Design and Installation of Rigid Pipe Hangers.pdf

1、Designation: F708 92 (Reapproved 2018)1An 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

2、revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () 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.1NOTEThe Keywords sect

3、ion was added editorially in September 2018.1. 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 an

4、d 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 valu

5、es stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with

6、its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized pri

7、nciples on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A307 Specification for Carbon

8、Steel Bolts, Studs, andThreaded Rod 60 000 PSI Tensile Strength3. Terminology3.1 Definitions:3.1.1 liner, nthe material used to isolate a pipe from itshanger.3.1.2 rider bar, na protective strip of material installedbetween the pipe and the hanger where frequent linear move-ment of the pipe is expec

9、ted.3.1.3 rigid pipe hanger, na device that transfers the loadimposed by the piping, insulation, and system medium to thesupporting structure.3.1.4 standoff, nthe rigid member that connects the hangerstrap, saddle, or band to the supporting structure. A standoff isusually made up of one or more piec

10、es 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:Hanger Fig. No.Split cap hanger (single leg standoff) 1(a)Split cap hanger (dual leg standoff) 1(b)Sp

11、lit cap hanger (chair type) 1(c)Strap hanger 2(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 hanger

12、 4(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

13、” band type hanger (bare pipe) 6(b)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 Sept. 1, 2018. Published October 2018. Originallyapproved in

14、 1981. Last previous edition approved in 2014 as F708 92 (2014).DOI: 10.1520/F0708-92R18E01.2For 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 S

15、ummary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Princip

16、les for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1Nelson hanger37Clamp hanger assembled with mounting channel 8Poly-block twin clamp hanger (assembled with welding plate)4,59(a)Poly-block

17、twin clamp hanger (assembled with welding stud)4,59(b)Poly-block twin clamp hanger (assembled with mountingchannel)4,59(c)Crimp-on weld stud-type hangers 10Banded weld stud-type hanger 11Poly-block single-clamp hanger (assembled with welding plate)512(a)Poly-block single-clamp hanger (assembled with

18、 welding stud)512(b)Poly-block single-clamp hanger (assembled with mountingchannel)512(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

19、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 hanger3is a specific design that has beenpatented by Nelson Division of TRW.5.2.2 The Fig. 9 and

20、Fig. 12 hangers4,5are 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 fabricated fromcommercial quality carbon steel. The steel should be a weld-abl

21、e grade with a minimum tensile strength of 47 ksi (324MPa) and capable of being bent at room temperature through90 to an inside radius equal to the material thickness withoutcracking on the outside of the bend.6.2 Hangers in Fig. 1, Fig. 6, Fig. 7, Fig. 10, and Fig. 11 aregenerally manufactured from

22、 carbon steel. Fig. 8 is furnishedin carbon steel and stainless steel. Fig. 9 and Fig. 12 hangerclamp halves are injected molded plastic furnished with carbonsteel or stainless steel hardware.6.3 Bands and buckles for Fig. 6 and Fig. 11 hangers shouldbe carbon steel electroplated zinc or stainless s

23、teel.6.4 Hanger bolts and nuts should be regular series hex typeelectroplated zinc with unified national coarse threads Class 2fit in accordance with Specification A307, Grade B.6.5 Table 7 is a listing of hanger liner materials generallyused to isolate the pipe from the hanger (see 9.1.1).7. Applic

24、ation and Limitations7.1 Unless otherwise noted, application and limitations onthe use of various style hangers should be as noted with eachhanger detail.8. Hanger Spacing8.1 Table 8 provides general guidance in determining pipehanger spacing. Special consideration should be given to areasof concent

25、rated loads, such as risers, valves, or groups offittings, and to piping configurations that could create rota-tional forces.9. General Requirements9.1 The following general requirements and conditions areapplicable to all styles of hangers:9.1.1 Hangers need not be lined unless the hanger and pipea

26、re of dissimilar material, or when the system internal operat-ing temperature is 300F (149C) and over, or 50F (10C) andunder and the heat transmitted to the other side of the structureto which the hanger is attached may be objectionable. Forhanger liner materials, see 6.5.9.1.2 All hanger bolts with

27、in tanks or other inaccessibleareas shall be secured with lock nuts, lock washers, or by someother means.9.1.3 Pipe hangers and standoffs located in areas subject tocorrosion, such as in bilges, ballast tanks, and areas exposed tothe weather, should be zinc-plated or blasted and coated withinorganic

28、 zinc or coated with the same material as that of thesurrounding area.9.1.4 Standoffs fabricated from pipe should not be usedwithin tanks.9.1.5 Where thermal growth of piping exceeds 0.100 in. (2.5mm) or long runs of pipe are affected by ship flexing, such aslong runs on the weather deck, or long ru

29、ns in longitudinalpassageways, a metal rider bar attached to the pipe or aTFE-fluorocarbon wear strip should be used in conjunctionwith a clearance type hanger, or other means should beprovided to prevent chaffing of the pipe.9.1.6 Consideration should be given to thermal growth ofthe piping when se

30、lecting or locating hangers so as not tooverstress the piping or hangers.9.1.7 Nonmetallic pipe should be hung in accordance withthe manufacturers recommendations.10. Workmanship, Finish, and Appearance10.1 Finished hanger components shall have a workman-like appearance and be free of cracks or othe

31、r injurious defects.Surface scale, rust, welding slag, or any foreign material (suchas oil) shall be removed before painting or coating.11. Keywords11.1 design; fabrication; installation; piping systems; rigidpipe hangers3The sole source of supply of the apparatus known to the committee at this time

32、is TRW Nelson Div., Toledo Ave. and E. 28th St., Lorain, OH 44055. If you areaware of alternative suppliers, please provide this information to ASTM Interna-tional Headquarters. Your comments will receive careful consideration at a meetingof the responsible technical committee,1which you may attend.

33、4The sole source of supply of the apparatus known to the committee at this timeis Stauff Corp., 41 Newman St., Hackensack, NJ 07601. If you are aware ofalternative suppliers, please provide this information to ASTM InternationalHeadquarters. Your comments will receive careful consideration at a meet

34、ing of theresponsible technical committee,1which you may attend.5The sole source of supply of the poly-block hangers known to the committee atthis time is Behringer Corp., 108 Jabez St., Newark, NJ 07105. If you are aware ofalternative suppliers, please provide this information to ASTM International

35、Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.F708 92 (2018)12NOTE 1For dimensions of hangers, see Table 1.NOTE 2These hangers are suitable for use in all locations, including tanks and areas exposed to the wea

36、ther, and can be used lined or unlined.NOTE 3For Fig. 1(b), length of standoff legs may be unequal and angle of attachment may vary as required to suit conditions.NOTE 4Maximum length of standoff “L” shall be as follows: flat bar = 18 in.; pipe = 30 in.; and angle bar = 42 in.FIG. 1 Split Cap Hanger

37、sNOTE 1For dimensions of hangers, see Table 2.NOTE 2These hangers are suitable for use in all locations, including tanks and areas exposed to the weather, and can be used lined or unlined.NOTE 3Install standard flat washers as necessary to unlined strap to provide132 to18-in. (0.8 to 3.2-mm) clearan

38、ce for linear motion of piping whenrequired.FIG. 2 Strap HangersF708 92 (2018)13NOTE 1For dimensions of hangers, see Table 3.NOTE 2These hangers are suitable for use in all locations, including tanks and areas exposed to the weather, and are intended to be used unlined only.NOTE 3Weld as indicated f

39、or size 3-in. NPS and above. For 212-in. NPS and below, weld hanger on outside only.FIG. 3 Welded HangersNOTE 1For dimensions of hangers, see Table 4.NOTE 2These hangers are suitable for use in all locations, including tanks and areas exposed to the weather, and are intended to be used unlined.FIG.

40、4 U-Bolt HangersF708 92 (2018)14NOTE 1For dimensions of hangers, see Table 5.NOTE 2These hangers are limited to use on normally dry ferrous piping systems, such as sounding tubes. Air escapes and plumbing drains with awall thickness of 0.200 in. (5.1 mm) or more.NOTE 3These hangers should not be use

41、d where takedown is required or in the steering gear room, inner bottoms, fore peak, aft peak or deep tanks,or other high vibration or inaccessible areas.NOTE 4For Fig. 5(b), length of standoff legs may be unequal and angle of attachment may vary as required to suit conditions.FIG. 5 Welded HangersN

42、OTE 1For dimensions of hangers, see Table 6.NOTE 2These hangers are suitable for use in all locations, except tanks and areas exposed to the weather, and can be used lined or unlined.FIG. 6 J-Band Type HangersF708 92 (2018)15NOTE 1This hanger is suitable for use in all locations except tanks.NOTE 2T

43、his hanger is limited to use on pipe 4-in. NPS and below with a system operating temperature of 200F (93.3C) or less.FIG. 7 Nelson HangerNOTE 1These hangers are suitable for use in all locations, including tanks and areas exposed to the weather. When used in areas subject to highcorrosion, such as s

44、alt water ballast tanks or weather decks, stainless steel hanger components shall be used.NOTE 2These hangers are suitable for supporting single or multiple runs of piping 2 in. (50.8 mm) or smaller.FIG. 8 Clamp Hanger Assembled with Mounting ChannelF708 92 (2018)16NOTE 1These hangers are suitable f

45、or use in all locations, including tanks and areas exposed to the weather. When used in areas subject to highcorrosion, such as salt water ballast tanks or weather decks, stainless steel hanger components shall be used.NOTE 2These hangers are limited to use on pipe 114-in. NPS and below and tubing 1

46、12-in. outside diameter and below with a system operatingtemperature of 300F (149C) or less.NOTE 3These hangers may be used for multiple pipe installations installed vertically, horizontally, or stacked using a welding plate, welding stud,or attached to a mounting channel.FIG. 9 Stauff Twin Clamp Ha

47、nger4,5NOTE 1These hangers are suitable for use in all locations, except tanks, and should be coated with neoprene or other similar material when used tosupport nonferrous tubing.NOTE 2These hangers are limited to use on tubing with an outside diameter of 118 in. (28.6 mm) or smaller with a system o

48、perating temperatureof 180F (82.2C) or less.NOTE 3Size and quantity of tubes may be varied provided they are arranged so as to be securely clamped.FIG. 10 Crimp-On Weld Stud HangersF708 92 (2018)17NOTE 1These hangers are suitable for use in all locations except tanks.NOTE 2These hangers are limited

49、to use on tubing with an outside diameter of12 in. (12.7 mm) or smaller with a system operating temperature of180F (82.2C) or less.NOTE 3Size and quantity of tube may be varied, provided they are arranged so as to be securely clamped.FIG. 11 Banded Weld Stud HangerNOTE 1These single poly-block hangers are available in Standard Duty and Heavy Duty Series dependent upon application.NOTE 2These hangers are suitable for use in all locations, including tanks and areas exposed to the weather. When used in areas