1、Designation: F704 81 (Reapproved 2014) An American National StandardStandard Practice forSelecting Bolting Lengths for Piping System FlangedJoints1This standard is issued under the fixed designation F704; the number immediately following the designation indicates the year of originaladoption or, in
2、the case of 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.1. Scope1.
3、1 This practice covers bolt and stud bolt lengths,quantities, and thread series for pipe to pipe and pipe to valveflanged joints (Note 1) in the nominal pipe size ranges of12- through 48-in. (12.7- through 1219-mm) diameter andpressure range of 125 through 2500 psi (0.8 through 17 236kPa).NOTE 1This
4、 is applicable when flange of valve has the same thicknessas mating flange.1.2 The values 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.1.3 This s
5、tandard 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.
6、1 ANSI Standards:2B1.1 Unified Screw ThreadsB16.1 Cast Iron Pipe Flanges and Flanged Fittings (25, 125,250, and 800 lb)B16.5 Steel Pipe Flanges and Flanged Fittings (150, 300,400, 600, 900, 1500, and 2500 lb Including Reference toValves)B16.24 Bronze Flanges and Flanged Fittings (150 and 300lb)B18.2
7、.1 Square and Hex Bolts and ScrewsB18.2.2 Square and Hex Nuts2.2 MSS Standards:3MSS SP-44 Steel Pipe Flanges3. Bolting Criteria3.1 Bolt and stud bolt lengths are computed using thefollowing (see Annex A1):3.1.1 Includes maximum nut thickness in accordance withANSI B18.2.2.3.1.2 Does not include wash
8、er thickness.3.1.3 Does not include bolt or stud bolt point height.3.1.4 Includes allowance for up to18-in. (3.2-mm) thickgaskets, except butterfly valves.3.1.5 Includes14-in. (6.3-mm) raised face in addition toflange thickness listed in tables for flanges rated at 400 psi (2.8kPa) and above.3.1.6 I
9、ncludes use of heavy hex nut and bolt design.3.1.7 Includes plus tolerance for flange thickness in accor-dance with ANSI B16.5.3.2 All bolts and stud bolts have threads in accordance withANSI B1.1, Class 2A dimensioning and nuts Class 2B.3.3 The material requirements for bolts, stud bolts, and nutsa
10、re obtained from the material specifications of individualsystem diagrams.3.4 Alloy steel bolting 1-in. (25.4-mm) nominal diameterand smaller and all carbon steel bolting has threads of the UNCSeries; alloy steel bolting above 1-in. nominal diameter hasthreads of the 8-UN Series.3.5 For detailed des
11、criptions of flange bolting assemblies,butterfly valve bolting assemblies, and tapped lug-type butter-fly valve bolting assemblies, refer to Figs. 17.4. List of Tables4.1 The tables are arranged in the following sequence:150-lb Steel Flanged Joints Table 1300-lb Steel Flanged Joints Table 2400-lb St
12、eel Flanged Joints Table 31This 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 Nov. 1, 2014. Published November 2014. Originallyapproved in 1981. La
13、st previous edition approved in 2009 as F704 81 (2009).DOI: 10.1520/F0704-81R14.2Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.3Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS)
14、, 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1600-lb Steel Flanged Joints Table 4900-lb Steel Flanged Joints Table 51500-lb Steel Flanged Joints Table 62500-lb Steel Flanged
15、Joints Table 7150-lb Bronze Flanged Joints Table 8300-lb Bronze Flanged Joints Table 9150-lb Steel Flat Face to 150-lbBronze Flanged JointsTable 10300-lb Steel Flat Face to 300-lbBronze Flanged JointsTable 11125-lb Cast Iron to 150-lb Steel FlatFace Flanged JointsTable 12250-lb Cast Iron to 300-lb S
16、teel FlatFace Flanged JointsTable 13800-lb Cast Iron to 600-lb SteelFlanged JointsTable 14Wafer-Type Butterfly Valve and150-lb Steel FlangesTable 15Wafer-Type Butterfly Valve and150-lb Bronze FlangesTable 16Bolting Lengths for Tapped Lug-Type Butterfly Valve and 150-lbSteel Flanges to ANSI B16.5Tabl
17、e 17Bolting Lengths for Tapped Lug-Type Butterfly Valve and 150 lbBronze Flanges to ANSI B16.24Table 185. Keywords5.1 bolting lengths; cover bolt; flange joint(s); marine tech-nology; ships; stud boltsTABLE 1 Bolting Lengths for 150-lb Steel Flanged Joints to ANSI B16.5 and MSS SP-44 (see Fig. 1 and
18、 Fig. 2)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthCarbonSteel,in.AStud BoltLengthCar-bon Steel,in.A1212 471612-13 UNC-2A 134 2143412 41212-13 UNC-2A 2 212112 491612-13 UNC-2A 2 21211412 45812-13 UNC-2A 214 23411212 4111612-13 UNC-2A 214
19、234258 43458-11 UNC-2A 234 31421258 47858-11 UNC-2A 3 312358 4151658-11 UNC-2A 3 31231258 8151658-11 UNC-2A 3 312458 8151658-11 UNC-2A 3 312534 81516 334-11 UNC-2A 314 334634 8134-10 UNC-2A 314 48341834-10 UNC-2A 312 4141078 12 131678-9 UNC-2A 334 4121278 12 11478-9 UNC-2A 4 43414 1 12 138 1-8 UNC-2
20、A 414 51416 1 16 1716 1-8 UNC-2A 412 51418 118 16 1916 118-7 UNC-2A 53420 118 20 11116 118-7 UNC-2A 514 61424 114 20 178 114-7 UNC-2A 534 63426 114 24 21116 11116-7 UNC-2A 714 81228 114 28 21316 114-7 UNC-2A 712 83430 114 28 21516 114-7 UNC-2A 734 932 112 28 3316 112-6 UNC-2A 834 1034 112 32 314 112
21、-6 UNC-2A 834 1036 112 32 3916 112-6 UNC-2A 912 103438 112 32 3716 112-6 UNC-2A 914 101240 112 36 3916 112-6 UNC-2A 912 103442 112 36 31316 112-6 UNC-2A 10 111444 112 40 4 112-6 UNC-2A 1014 111246 112 40 4116 112-6 UNC-2A 1012 113448 112 44 414 112-6 UNC-2A 1034 1214A1 in. = 25.4 mm.F704 81 (2014)2T
22、ABLE 2 Bolting Lengths for 300-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 1 and Fig. 2)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthCarbonSteel,in.AStud BoltLengthCar-bon Steel,in.A1212 491612-13 UNC-2A 2 2123458 45858-11 UNC-2A 214 31
23、58 4111658-11 UNC-2A 212 311458 43458-11 UNC-2A 212 31411234 4131634-10 UNC-2A 3 312258 87858-11 UNC-2A 3 31221234 8134-10 UNC-2A 314 43341834-10 UNC-2A 312 4143123431634-10 UNC-2A 334 414434 811434-10 UNC-2A 334 4125343834-10 UNC-2A 4 434634 12 171634-10 UNC-2A 414 434878 12 15878-8 UNC-2A 434 5121
24、0 1 16 178 1-8 UNC-2A 514 61412 118 16 2 118-7 UNC-2A 534 63414 118 20 218 118-7 UNC-2A 6 716 114 20 214 114-7 UNC-2A 614 718 114 24 238 114-7 UNC-2A 612 73420 114 24 212 114-7 UNC-2A 7 824 112 24 234 112-6 UNC-2A 734 9A1 in. = 25.4 mm.TABLE 3 Bolting Lengths for 400-lb Steel Flanged Joints to ANSI
25、B16.5 (see Fig. 3 and Fig. 4)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthAlloySteel, in.AStud BoltLength Al-loySteel, in.A12BBB B BB341114BBB B BB1122212BBB B BB3312478 813878-9 UNC-2A not used 5125781278-9 UNC-2A not used 534678 12 15878-
26、9 UNC-2A not used 6811278 1-8 UNC-2A not used 63410 118 16 218 118-8 UN-2A not used 71212 114 16 214 114-8 UN-2A not used 814 114 20 238 114-8 UN-2A not used 81416 138 20 212 138-8 UN-2A not used 83418 138 24 258 138-8 UN-2A not used 920 112 24 234 112-8 UN-2A not used 91224 134 24 3 134-8 UN-2A not
27、 used 1012A1 in. = 25.4 mm.BFor dimensions of these pipe sizes, refer to Table 4.F704 81 (2014)3TABLE 4 Bolting Lengths for 600-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 3 and Fig. 4)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthAlloyS
28、teel, in.AStud BoltLength Al-loySteel, in.A1212 491612-13 UNC-2A not used 33458 45858-11 UNC-2A not used 312158 4111658-11 UNC-2A not used 31211458 4131658-11 UNC-2A not used 33411234 47834-10 UNC-2A not used 414258 8158-11 UNC-2A not used 414212341834-10 UNC-2A not used 4343341434-10 UNC-2A not use
29、d 531278 813878-9 UNC-2A not used 5124781278-9 UNC-2A not used 53451 834 1-8 UNC-2A not used 612611278 1-8 UNC-2A not used 6348118 12 2316 118-8 UN-2A not used 71210 114 16 212 114-8 UN-2A not used 81212 114 20 258 114-8 UN-2A not used 83414 138 20 234 138-8 UN-2A not used 91416 112 20 3 112-8 UN-2A
30、 not used 1018 158 20 314 158-8 UN-2A not used 103420 158 24 312 158-8 UN-2A not used 111424 178 24 4 178-8 UN-2A not used 13A1 in. = 25.4 mm.TABLE 5 Bolting Lengths for 900-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 3 and Fig. 4)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlangeThick
31、ness,in.ABolt StudBolt ThreadBolt LengthAlloySteel, in.AStud BoltLength Al-loySteel, in.A12BBB B BB341114BBB B BB1122212BBB B BB378 811278-9 UNC-2A not used 534411834 118-8 UN-2A not used 6345114 8214-8 UN-2A not used 7126118 12 2316 118-8 UN-2A not used 7128138 12 212 138-8 UN-2A not used 83410 138
32、 16 234 138-8 UN-2A not used 91412 138 20 318 138-8 UN-2A not used 1014 112 20 338 112-8 UN-2A not used 103416 158 20 312 158-8 UN-2A not used 111418 178 20 4 178-8 UN-2A not used 123420 2 20 414 2-8 UN-2A not used 133424 212 20 512 212-8 UN-2A not used 1714A1 in. = 25.4 mm.BFor dimensions of these
33、pipe sizes, refer to Table 6.F704 81 (2014)4TABLE 6 Bolting Lengths for 1500-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 3 and Fig. 4)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthAlloySteel, in.AStud BoltLength Al-loySteel, in.A1234 478
34、34-10 UNC-2A not used 4143434 4134-10 UNC-2A not used 4121781878-9 UNC-2A not used 5114781878-9 UNC-2A not used 5112 1414 1-8 UNC-2A not used 512278 811278-9 UNC-2A not used 534212 1858 1-8 UNC-2A not used 614311878 118-8 UN-2A not used 74114 8218 114-8 UN-2A not used 734511278 112-8 UN-2A not used
35、9346138 12 314 138-8 UN-2A not used 10148158 12 358 158-8 UN-2A not used 111210 178 12 414 178-8 UN-2A not used 131412 2 16 478 2-8 UN-2A not used 143414 214 16 514 214-8 UN-2A not used 1616 212 16 534 212-8 UN-2A not used 171218 234 16 638 234-8 UN-2A not used 191220 3 16 7 3-8 UN-2A not used 21142
36、4 312 16 8 312-8 UN-2A not used 2414A1 in. = 25.4 mm.TABLE 7 Bolting Lengths for 2500-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 3 and Fig. 4)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthAlloySteel, in.AStud BoltLength Al-loySteel, in.
37、A1234 4131634-10 UNC-2A not used 43434341434-10 UNC-2A not used 51783878-9 UNC-2A not used 512114 1412 1-8 UNC-2A not used 6112 118 4134 118-8 UN-2A not used 6342 1 8 2 1-8 UNC-2A not used 7212 118 8214 118-8 UN-2A not used 734311458 114-8 UN-2A not used 8344112 8312-8 UN-2A not used 10513458 134-8
38、UN-2A not used 113462 8414 2-8 UN-2A not used 13128 2 12 5 2-8 UN-2A not used 1510 212 12 612 212-8 UN-2A not used 191412 234 12 714 234-8 UN-2A not used 2114A1 in. = 25.4 mm.F704 81 (2014)5TABLE 8 Bolting Lengths for 150-lb Bronze Flanged Joints to ANSI B16.24 (see Fig. 1 and Fig. 2)NominalPipe Siz
39、e,in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthCarbonSteel,in.AStud BoltLengthCar-bon Steel,in.A1212 451612-13 UNC-2A 112 23412 4113212-13 UNC-2A 134 214112 43812-13 UNC-2A 134 21411412 4133212-13 UNC-2A 134 21411212 471612-13 UNC-2A 134 214258 41258-11 UNC
40、-2A 2 23421258 491658-11 UNC-2A 214 234358 45858-11 UNC-2A 214 331258 8111658-11 UNC-2A 212 3458 8111658-11 UNC-2A 212 3534 83434-10 UNC-2A 234 312634 8131634-10 UNC-2A 3 312834 8151634-10 UNC-2A 314 3341078 12 178-9 UNC-2A 312 4141278 12 11678-9 UNC-2A 312 414A1 in. = 25.4 mm.TABLE 9 Bolting Length
41、s for 300-lb Bronze Flanged Joints to ANSI B16.24 (see Fig. 1 and Fig. 2)NominalPipeSize, in.BoltDiameter,in.AQuantityper JointFlangeThickness,in.ABolt StudBolt ThreadBolt LengthCarbonSteel,in.AStud BoltLengthCarbonSteel, in.A1212 41212-13 UNC-2A 2 2123458 4173258-11 UNC-2A 214 234158 4193258-11 UNC
42、-2A 214 311458 45858-11 UNC-2A 214 311234 4111634-10 UNC-2A 212 314258 83458-11 UNC-2A 212 31421234 8131634-10 UNC-2A 3 312334 8293234-10 UNC-2A 3 33431234 8313234-10 UNC-2A 314 4434 8111634-10 UNC-2A 314 45341834-10 UNC-2A 312 414634 12 131634-10 UNC-2A 312 414878 12 13878-9 UNC-2A 414 5A1 in. = 25
43、.4 mm.F704 81 (2014)6TABLE 10 Bolting Lengths for 150-lb Steel Flat Face to Bronze Flanged Joints to ANSI B16.5 and B16.24(see Fig. 1 and Fig. 2)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlange Thickness, in.ABolt StudBolt ThreadBolt LengthCarbonSteel, in.AStud BoltLengthCar-bon Steel,in
44、.ASteel Bronze1212 471651612-13 UNC-2A 134 2143412 412113212-13 UNC-2A 134 214112 49163812-13 UNC-2A 134 21411412 458133212-13 UNC-2A 2 21211212 4111671612-13 UNC-2A 2 212258 4341258-11 UNC-2A 214 321258 47891658-11 UNC-2A 212 314358 415165858-11 UNC-2A 234 31431258 81516111658-11 UNC-2A 234 314458
45、81516111658-11 UNC-2A 234 314534 815163434-10 UNC-2A 3 334634 81131634-10 UNC-2A 3 33483418151634-10 UNC-2A 314 41078 12 1316 178-9 UNC-2A 312 4121278 12 114 111678-9 UNC-2A 334 412A1 in. = 25.4 mm.TABLE 11 Bolting Lengths for 300-lb Steel Flat Face to Bronze Flanged Joints to ANSI B16.5 and B16.24(
46、see Fig. 1 and Fig. 2)NominalPipe Size,in.BoltDiameter,in.AQuantityper JointFlange Thickness, in.ABolt StudBolt ThreadBolt LengthCarbonSteel, in.AStud BoltLengthCar-bon Steel,in.ASteel Bronze1212 49161212-13 UNC-2A 2 2123458 458173258-11 UNC-2A 214 234158 41116193258-11 UNC-2A 214 311458 4345858-11
47、UNC-2A 212 311234 41316111634-10 UNC-2A 234 312258 8783458-11 UNC-2A 234 31421234 81131634-10 UNC-2A 3 33433418293234-10 UNC-2A 314 431234 81316313234-10 UNC-2A 312 4434 8114 111634-10 UNC-2A 312 41453438 11834-10 UNC-2A 334 412634 12 1716131634-10 UNC-2A 334 412878 12 158 13878-9 UNC-2A 412 514A1 in. = 25.4 mm.F704 81 (2014)7TABLE 12 Bolting Lengths
