1、Designation:F70481(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 the ca
2、se 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
3、 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).NOTE1This is applicable when flan
4、ge 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 standard does not purport
5、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 ANSI Standards:2B1.1 Unifie
6、d 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)B18.2.1 Square and Hex Bolts and ScrewsB18.2
7、.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 washer thickness.3.1.3 Does not include bolt
8、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 Includes use of heavy hex nut and bolt design.3.1
9、.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 nutsare obtained from the material specifications of ind
10、ividualsystem 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 descriptions of flange bolting assemblies,butterfly valve
11、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 JointsTable 1300-lb Steel Flanged JointsTable 2400-lb Steel Flanged JointsTable 31This practice is under the jurisdic
12、tion 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.Last previous edition approved in 2009 as F704 81(2009).DOI:10.1520/F
13、0704-81R14.2Available 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),127 Park St.,NE,Vienna,VA 22180-4602,http:/www.mss-.Copyright ASTM Internat
14、ional,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 600-lb Steel Flanged JointsTable 4900-lb Steel Flanged JointsTable 51500-lb Steel Flanged JointsTable 62500-lb Steel Flanged JointsTable 7150-lb Bronze Flanged JointsTable 8300-lb Bronze Flanged JointsTable 9150-l
15、b 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 Steel FlatFace Flanged JointsTable 13800-lb Cast Iron to 600-lb SteelFlanged JointsTable 14W
16、afer-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 B16.5Table 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 an
