ASTM F704-81(2022)

Standard Practice for Selecting Bolting Lengths for Piping System Flanged Joints

ABSTRACT
This practice covers bolt and stud bolt lengths, quantities, and thread series for pipe to pipe and pipe to valve flanged joints. This specification presents tables of bolting lengths for different steel flanged joints.
SCOPE
1.1 This practice covers bolt and stud bolt lengths, quantities, and thread series for pipe to pipe and pipe to valve flanged joints (Note 1) in the nominal pipe size ranges of 1/2 in. through 48 in. (12.7 mm through 1219 mm) diameter and pressure range of 125 psi through 2500 psi (0.8 kPa through 17 236 kPa).
Note 1: This is applicable when flange of valve has the same thickness as mating flange.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2022
• ICS: 21.060.10 - Bolts, screws, studs
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F704 − 81 (Reapproved 2022) An American National Standard
Standard Practice for
Selecting Bolting Lengths for Piping System Flanged
Joints
ThisstandardisissuedunderthefixeddesignationF704;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) 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. Scope B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through
NPS 24 Metric/Inch Standard
1.1 This practice covers bolt and stud bolt lengths,
B16.24 Cast Copper Alloy Pipe Flanges, Flanged Fittings,
quantities, and thread series for pipe to pipe and pipe to valve
and Valves: Classes 150, 300, 600, 900, 1500, and 2500
flanged joints (Note 1) in the nominal pipe size ranges of ⁄2 in.
B18.2.1 Square, Hex, Heavy Hex, and Askew Head Bolts
through 48 in. (12.7 mm through 1219 mm) diameter and
and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag
pressure range of 125 psi through 2500 psi (0.8 kPa through
Screws (Inch Series)
17 236 kPa).
B18.2.2 Nuts for General Applications: Machine Screw
NOTE1—Thisisapplicablewhenflangeofvalvehasthesamethickness
Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch
as mating flange.
Series)
1.2 The values stated in inch-pound units are to be regarded
2.2 MSS Standards:
as standard. The values given in parentheses are mathematical
MSS-SP-44 Steel Pipe Flanges
conversions to SI units that are provided for information only
and are not considered standard. 3. Bolting Criteria
1.3 This standard does not purport to address all of the
3.1 Bolt and stud bolt lengths are computed using the
safety concerns, if any, associated with its use. It is the
following (see Annex A1):
responsibility of the user of this standard to establish appro-
3.1.1 Includes maximum nut thickness in accordance with
priate safety, health, and environmental practices and deter-
ASME B18.2.2.
mine the applicability of regulatory limitations prior to use.
3.1.2 Does not include washer thickness.
1.4 This international standard was developed in accor-
3.1.3 Does not include bolt or stud bolt point height.
dance with internationally recognized principles on standard-
3.1.4 Includes allowance for up to ⁄8 in. (3.2 mm) thick
ization established in the Decision on Principles for the
gaskets, except butterfly valves.
Development of International Standards, Guides and Recom-
3.1.5 Includes ⁄4 in. (6.3 mm) raised face in addition to
mendations issued by the World Trade Organization Technical
flange thickness listed in tables for flanges rated at 400 psi (2.8
Barriers to Trade (TBT) Committee.
kPa) and above.
3.1.6 Includes use of heavy hex nut and bolt design.
2. Referenced Documents
3.1.7 Includes plus tolerance for flange thickness in accor-
2 dance with ASME B16.5.
2.1 ASME Standards:
B1.1 Unified Inch Screw Threads (UN and UNR Thread
3.2 All bolts and stud bolts have threads in accordance with
Form) ASME B1.1, Class 2A dimensioning and nuts Class 2B.
B16.1 Gray Iron Pipe Flanges and Flanged Fittings: Classes
3.3 The material requirements for bolts, stud bolts, and nuts
25, 125, and 250
are obtained from the material specifications of individual
system diagrams.
1 3.4 Alloy steel bolting 1 in. (25.4 mm) nominal diameter
This practice is under the jurisdiction of ASTM Committee F25 on Ships and
Marine Technology and is the direct responsibility of Subcommittee F25.11 on
and smaller and all carbon steel bolting has threads of the UNC
Machinery and Piping Systems.
Series; alloy steel bolting above 1-in. nominal diameter has
Current edition approved Oct. 1, 2022. Published October 2022. Originally
ɛ1 threads of the 8-UN Series.
approved in 1981. Last previous edition approved in 2018 as F704 – 81 (2018) .
DOI: 10.1520/F0704-81R22.
Available from American Society of Mechanical Engineers (ASME), ASME
International Headquarters, Two Park Ave., New York, NY 10016-5990, http:// AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
www.asme.org. Industry (MSS), 127 Park St., NE, Vienna, VA22180-4602, http://www.mss-hq.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F704 − 81 (2022)
3.5 For detailed descriptions of flange bolting assemblies,
Bolting Lengths for Tapped Lug-Type Butterfly Valve Table 18
and 150-lb Bronze Flanges to ASME B16.24
butterfly valve bolting assemblies, and tapped lug-type butter-
fly valve bolting assemblies, refer to Figs. 1–7.
4. List of Tables
5. Keywords
4.1 The tables are arranged in the following sequence:
5.1 bolting lengths; cover bolt; flange joint(s); marine tech-
150-lb Steel Flanged Joints Table 1
nology; ships; stud bolts
300-lb Steel Flanged Joints Table 2
400-lb Steel Flanged Joints Table 3
600-lb Steel Flanged Joints Table 4
900-lb Steel Flanged Joints Table 5
1500-lb Steel Flanged Joints Table 6
2500-lb Steel Flanged Joints Table 7
150-lb Bronze Flanged Joints Table 8
300-lb Bronze Flanged Joints Table 9
150-lb Steel Flat Face to 150-lb Bronze Flanged Table 10
Joints
300-lb Steel Flat Face to 300-lb Bronze Flanged Table 11
Joints
125-lb Cast Iron to 150-lb Steel Flat Face Flanged Table 12
Joints
250-lb Cast Iron to 300-lb Steel Flat Face Flanged Table 13
Joints
800-lb Cast Iron to 600-lb Steel Flanged Joints Table 14
Wafer-Type Butterfly Valve and 150-lb Steel Flanges Table 15
Wafer-Type Butterfly Valve and 150-lb Bronze Flanges Table 16
Bolting Lengths for Tapped Lug-Type Butterfly Valve Table 17
and 150-lb Steel Flanges to ASME B16.5
TABLE 1 Bolting Lengths for 150-lb Steel Flanged Joints to ASME B16.5 and MSS-SP-44 (see Fig. 1 and Fig. 2)
Bolt Bolt Length Stud Bolt
Nominal Quantity Flange Bolt Stud
Diameter, Carbon Steel, Length
A
Pipe Size, in. per Joint Thickness, in. Bolt Thread
A A A
in. in. Carbon Steel, in.
1 1 7 1 3 1
⁄2 ⁄2 4 ⁄16 ⁄2-13 UNC-2A 1 ⁄4 2 ⁄4
3 1 1 1 1
⁄4 ⁄2 4 ⁄2 ⁄2-13 UNC-2A 2 2 ⁄2
1 9 1 1
1 ⁄2 4 ⁄16 ⁄2-13 UNC-2A 2 2 ⁄2
1 1 5 1 1 3
1 ⁄4 ⁄2 4 ⁄8 ⁄2-13 UNC-2A 2 ⁄4 2 ⁄4
1 1 11 1 1 3
1 ⁄2 ⁄2 4 ⁄16 ⁄2-13 UNC-2A 2 ⁄4 2 ⁄4
5 3 5 3 1
2 ⁄8 4 ⁄4 ⁄8-11 UNC-2A 2 ⁄4 3 ⁄4
1 5 7 5 1
2 ⁄2 ⁄8 4 ⁄8 ⁄8-11 UNC-2A 3 3 ⁄2
5 15 5 1
3 ⁄8 4 ⁄16 ⁄8-11 UNC-2A 3 3 ⁄2
1 5 15 5 1
3 ⁄2 ⁄8 8 ⁄16 ⁄8-11 UNC-2A 3 3 ⁄2
5 15 5 1
4 ⁄8 8 ⁄16 ⁄8-11 UNC-2A 3 3 ⁄2
3 15 3 1 3
5 ⁄4 8 ⁄16 3 ⁄4-11 UNC-2A 3 ⁄4 3 ⁄4
3 3 1
6 ⁄4 81 ⁄4-10 UNC-2A 3 ⁄4 4
3 1 3 1 1
8 ⁄4 81 ⁄8 ⁄4-10 UNC-2A 3 ⁄2 4 ⁄4
7 3 7 3 1
10 ⁄8 12 1 ⁄16 ⁄8-9 UNC-2A 3 ⁄4 4 ⁄2
7 1 7 3
12 ⁄8 12 1 ⁄4 ⁄8-9 UNC-2A 4 4 ⁄4
3 1 1
14 1 12 1 ⁄8 1-8 UNC-2A 4 ⁄4 5 ⁄4
7 1 1
16 1 16 1 ⁄16 1-8 UNC-2A 4 ⁄2 5 ⁄4
1 9 1 3
18 1 ⁄8 16 1 ⁄16 1 ⁄8-7 UNC-2A 5 ⁄4
1 11 1 1 1
20 1 ⁄8 20 1 ⁄16 1 ⁄8-7 UNC-2A 5 ⁄4 6 ⁄4
1 7 1 3 3
24 1 ⁄4 20 1 ⁄8 1 ⁄4-7 UNC-2A 5 ⁄4 6 ⁄4
1 11 11 1 1
26 1 ⁄4 24 2 ⁄16 1 ⁄16-7 UNC-2A 7 ⁄4 8 ⁄2
1 13 1 1 3
28 1 ⁄4 28 2 ⁄16 1 ⁄4-7 UNC-2A 7 ⁄2 8 ⁄4
1 15 1 3
30 1 ⁄4 28 2 ⁄16 1 ⁄4-7 UNC-2A 7 ⁄4 9
1 3 1 3
32 1 ⁄2 28 3 ⁄16 1 ⁄2-6 UNC-2A 8 ⁄4 10
1 1 1 3
34 1 ⁄2 32 3 ⁄4 1 ⁄2-6 UNC-2A 8 ⁄4 10
1 9 1 1 3
36 1 ⁄2 32 3 ⁄16 1 ⁄2-6 UNC-2A 9 ⁄2 10 ⁄4
1 7 1 1 1
38 1 ⁄2 32 3 ⁄16 1 ⁄2-6 UNC-2A 9 ⁄4 10 ⁄2
1 9 1 1 3
40 1 ⁄2 36 3 ⁄16 1 ⁄2-6 UNC-2A 9 ⁄2 10 ⁄4
1 13 1 1
42 1 ⁄2 36 3 ⁄16 1 ⁄2-6 UNC-2A 10 11 ⁄4
1 1 1 1
44 1 ⁄2 40 4 1 ⁄2-6 UNC-2A 10 ⁄4 11 ⁄2
1 1 1 1 3
46 1 ⁄2 40 4 ⁄16 1 ⁄2-6 UNC-2A 10 ⁄2 11 ⁄4
1 1 1 3 1
48 1 ⁄2 44 4 ⁄4 1 ⁄2-6 UNC-2A 10 ⁄4 12 ⁄4
A
1 in. = 25.4 mm.
F704 − 81 (2022)
TABLE 2 Bolting Lengths for 300-lb Steel Flanged Joints to ASME B16.5 (see Fig. 1 and Fig. 2)
Nominal Bolt Bolt Length Stud Bolt
Quantity Flange Bolt Stud
Pipe Size, Diameter, Carbon Steel, Length
A
per Joint Thickness, in. Bolt Thread
A A A
in. in. in. Carbon Steel, in.
1 1 9 1 1
⁄2 ⁄2 4 ⁄16 ⁄2-13 UNC-2A 2 2 ⁄2
3 5 5 5 1
⁄4 ⁄8 4 ⁄8 ⁄8-11 UNC-2A 2 ⁄4 3
5 11 5 1
1 ⁄8 4 ⁄16 ⁄8-11 UNC-2A 2 ⁄2 3
1 5 3 5 1 1
1 ⁄4 ⁄8 4 ⁄4 ⁄8-11 UNC-2A 2 ⁄2 3 ⁄4
1 3 13 3 1
1 ⁄2 ⁄4 4 ⁄16 ⁄4-10 UNC-2A 3 3 ⁄2
5 7 5 1
2 ⁄8 8 ⁄8 ⁄8-11 UNC-2A 3 3 ⁄2
1 3 3 1
2 ⁄2 ⁄4 81 ⁄4-10 UNC-2A 3 ⁄4 4
3 1 3 1 1
3 ⁄4 81 ⁄8 ⁄4-10 UNC-2A 3 ⁄2 4 ⁄4
1 3 3 3 3 1
3 ⁄2 ⁄4 81 ⁄16 ⁄4-10 UNC-2A 3 ⁄4 4 ⁄4
3 1 3 3 1
4 ⁄4 81 ⁄4 ⁄4-10 UNC-2A 3 ⁄4 4 ⁄2
3 3 3 3
5 ⁄4 81 ⁄8 ⁄4-10 UNC-2A 4 4 ⁄4
3 7 3 1 3
6 ⁄4 12 1 ⁄16 ⁄4-10 UNC-2A 4 ⁄4 4 ⁄4
7 5 7 3 1
8 ⁄8 12 1 ⁄8 ⁄8-8 UNC-2A 4 ⁄4 5 ⁄2
7 1 1
10 1 16 1 ⁄8 1-8 UNC-2A 5 ⁄4 6 ⁄4
1 1 3 3
12 1 ⁄8 16 2 1 ⁄8-7 UNC-2A 5 ⁄4 6 ⁄4
1 1 1
14 1 ⁄8 20 2 ⁄8 1 ⁄8-7 UNC-2A 6 7
1 1 1 1
16 1 ⁄4 20 2 ⁄4 1 ⁄4-7 UNC-2A 6 ⁄4 7
1 3 1 1 3
18 1 ⁄4 24 2 ⁄8 1 ⁄4-7 UNC-2A 6 ⁄2 7 ⁄4
1 1 1
20 1 ⁄4 24 2 ⁄2 1 ⁄4-7 UNC-2A 7 8
1 3 1 3
24 1 ⁄2 24 2 ⁄4 1 ⁄2-6 UNC-2A 7 ⁄4 9
A
1 in. = 25.4 mm.
TABLE 3 Bolting Lengths for 400-lb Steel Flanged Joints to ASME B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Quantity Bolt Stud Bolt Length Alloy
Pipe Size, Diameter, Thickness, Length Alloy
A
per Joint Bolt Thread Steel, in.
A A A
in. in. in. Steel, in.
B B BBB B
⁄2
B B BBB B
⁄4
B B BBB B
B B BBB B
1 ⁄4
B B BBB B
1 ⁄2
B B BBB B
B B BBB B
2 ⁄2
B B BBB B
1 B B BBB B
3 ⁄2
7 3 7 1
4 ⁄8 81 ⁄8 ⁄8-9 UNC-2A not used 5 ⁄2
7 1 7 3
5 ⁄8 81 ⁄2 ⁄8-9 UNC-2A not used 5 ⁄4
7 5 7
6 ⁄8 12 1 ⁄8 ⁄8-9 UNC-2A not used 6
7 3
81 12 1 ⁄8 1-8 UNC-2A not used 6 ⁄4
1 1 1 1
10 1 ⁄8 16 2 ⁄8 1 ⁄8-8 UN-2A not used 7 ⁄2
1 1 1
12 1 ⁄4 16 2 ⁄4 1 ⁄4-8 UN-2A not used 8
1 3 1 1
14 1 ⁄4 20 2 ⁄8 1 ⁄4-8 UN-2A not used 8 ⁄4
3 1 3 3
16 1 ⁄8 20 2 ⁄2 1 ⁄8-8 UN-2A not used 8 ⁄4
3 5 3
18 1 ⁄8 24 2 ⁄8 1 ⁄8-8 UN-2A not used 9
1 3 1 1
20 1 ⁄2 24 2 ⁄4 1 ⁄2-8 UN-2A not used 9 ⁄2
3 3 1
24 1 ⁄4 24 3 1 ⁄4-8 UN-2A not used 10 ⁄2
A
1 in. = 25.4 mm.
B
For dimensions of these pipe sizes, refer to Table 4.
F704 − 81 (2022)
TABLE 4 Bolting Lengths for 600-lb Steel Flanged Joints to ASME B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Quantity Bolt Stud Bolt Length Alloy
Pipe Size, Diameter, Thickness, Length Alloy
A
per Joint Bolt Thread Steel, in.
A A A
in. in. in. Steel, in.
1 1 9 1
⁄2 ⁄2 4 ⁄16 ⁄2-13 UNC-2A not used 3
3 5 5 5 1
⁄4 ⁄8 4 ⁄8 ⁄8-11 UNC-2A not used 3 ⁄2
5 11 5 1
1 ⁄8 4 ⁄16 ⁄8-11 UNC-2A not used 3 ⁄2
1 5 13 5 3
1 ⁄4 ⁄8 4 ⁄16 ⁄8-11 UNC-2A not used 3 ⁄4
1 3 7 3 1
1 ⁄2 ⁄4 4 ⁄8 ⁄4-10 UNC-2A not used 4 ⁄4
5 5 1
2 ⁄8 81 ⁄8-11 UNC-2A not used 4 ⁄4
1 3 1 3 3
2 ⁄2 ⁄4 81 ⁄8 ⁄4-10 UNC-2A not used 4 ⁄4
3 1 3
3 ⁄4 81 ⁄4 ⁄4-10 UNC-2A not used 5
1 7 3 7 1
3 ⁄2 ⁄8 81 ⁄8 ⁄8-9 UNC-2A not used 5 ⁄2
7 1 7 3
4 ⁄8 81 ⁄2 ⁄8-9 UNC-2A not used 5 ⁄4
3 1
51 8 1 ⁄4 1-8 UNC-2A not used 6 ⁄2
7 3
61 12 1 ⁄8 1-8 UNC-2A not used 6 ⁄4
1 3 1 1
81 ⁄8 12 2 ⁄16 1 ⁄8-8 UN-2A not used 7 ⁄2
1 1 1 1
10 1 ⁄4 16 2 ⁄2 1 ⁄4-8 UN-2A not used 8 ⁄2
1 5 1 3
12 1 ⁄4 20 2 ⁄8 1 ⁄4-8 UN-2A not used 8 ⁄4
3 3 3 1
14 1 ⁄8 20 2 ⁄4 1 ⁄8-8 UN-2A not used 9 ⁄4
1 1
16 1 ⁄2 20 3 1 ⁄2-8 UN-2A not used 10
5 1 5 3
18 1 ⁄8 20 3 ⁄4 1 ⁄8-8 UN-2A not used 10 ⁄4
5 1 5 1
20 1 ⁄8 24 3 ⁄2 1 ⁄8-8 UN-2A not used 11 ⁄4
7 7
24 1 ⁄8 24 4 1 ⁄8-8 UN-2A not used 13
A
1 in. = 25.4 mm.
TABLE 5 Bolting Lengths for 900-lb Steel Flanged Joints to ASME B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Quantity Bolt Stud Bolt Length Alloy
Pipe Size, Diameter, Thickness, Length Alloy
A
per Joint Bolt Thread Steel, in.
A A A
in. in. in. Steel, in.
B B BBB B
⁄2
B B BBB B
⁄4
B B BBB B
B B BBB B
1 ⁄4
B B BBB B
1 ⁄2
B B BBB B
B B BBB B
2 ⁄2
7 1 7 3
3 ⁄8 81 ⁄2 ⁄8-9 UNC-2A not used 5 ⁄4
1 3 1 3
41 ⁄8 81 ⁄4 1 ⁄8-8 UN-2A not used 6 ⁄4
1 1 1
51 ⁄4 82 1 ⁄4-8 UN-2A not used 7 ⁄2
1 3 1 1
61 ⁄8 12 2 ⁄16 1 ⁄8-8 UN-2A not used 7 ⁄2
3 1 3 3
81 ⁄8 12 2 ⁄2 1 ⁄8-8 UN-2A not used 8 ⁄4
3 3 3 1
10 1 ⁄8 16 2 ⁄4 1 ⁄8-8 UN-2A not used 9 ⁄4
3 1 3
12 1 ⁄8 20 3 ⁄8 1 ⁄8-8 UN-2A not used 10
1 3 1 3
14 1 ⁄2 20 3 ⁄8 1 ⁄2-8 UN-2A not used 10 ⁄4
5 1 5 1
16 1 ⁄8 20 3 ⁄2 1 ⁄8-8 UN-2A not used 11 ⁄4
7 7 3
18 1 ⁄8 20 4 1 ⁄8-8 UN-2A not used 12 ⁄4
1 3
20 2 20 4 ⁄4 2-8 UN-2A not used 13 ⁄4
1 1 1 1
24 2 ⁄2 20 5 ⁄2 2 ⁄2-8 UN-2A not used 17 ⁄4
A
1 in. = 25.4 mm.
B
For dimensions of these pipe sizes, refer to Table 6.
F704 − 81 (2022)
TABLE 6 Bolting Lengths for 1500-lb Steel Flanged Joints to ASME B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Quantity Bolt Stud Bolt Length Alloy
Pipe Size, Diameter, Thickness, Length Alloy
A
per Joint Bolt Thread Steel, in.
A A A
in. in. in. Steel, in.
1 3 7 3 1
⁄2 ⁄4 4 ⁄8 ⁄4-10 UNC-2A not used 4 ⁄4
3 3 3 1
⁄4 ⁄4 41 ⁄4-10 UNC-2A not used 4 ⁄2
7 1 7
1 ⁄8 41 ⁄8 ⁄8-9 UNC-2A not used 5
1 7 1 7
1 ⁄4 ⁄8 41 ⁄8 ⁄8-9 UNC-2A not used 5
1 1 1
1 ⁄2 14 1 ⁄4 1-8 UNC-2A not used 5 ⁄2
7 1 7 3
2 ⁄8 81 ⁄2 ⁄8-9 UNC-2A not used 5 ⁄4
1 5 1
2 ⁄2 18 1 ⁄8 1-8 UNC-2A not used 6 ⁄4
1 7 1
31 ⁄8 81 ⁄8 1 ⁄8-8 UN-2A not used 7
1 1 1 3
41 ⁄4 82 ⁄8 1 ⁄4-8 UN-2A not used 7 ⁄4
1 7 1 3
51 ⁄2 82 ⁄8 1 ⁄2-8 UN-2A not used 9 ⁄4
3 1 3 1
61 ⁄8 12 3 ⁄4 1 ⁄8-8 UN-2A not used 10 ⁄4
5 5 5 1
81 ⁄8 12 3 ⁄8 1 ⁄8-8 UN-2A not used 11 ⁄2
7 1 7 1
10 1 ⁄8 12 4 ⁄4 1 ⁄8-8 UN-2A not used 13 ⁄4
7 3
12 2 16 4 ⁄8 2-8 UN-2A not used 14 ⁄4
1 1 1
14 2 ⁄4 16 5 ⁄4 2 ⁄4-8 UN-2A not used 16
1 3 1 1
16 2 ⁄2 16 5 ⁄4 2 ⁄2-8 UN-2A not used 17 ⁄2
3 3 3 1
18 2 ⁄4 16 6 ⁄8 2 ⁄4-8 UN-2A not used 19 ⁄2
20 3 16 7 3-8 UN-2A not used 21 ⁄4
1 1 1
24 3 ⁄2 16 8 3 ⁄2-8 UN-2A not used 24 ⁄4
A
1 in. = 25.4 mm.
TABLE 7 Bolting Lengths for 2500-lb Steel Flanged Joints to ASME B16.5 (see Fig. 3 and Fig. 4)
Bolt Flange Stud Bolt
Nominal Quantity Bolt Stud Bolt Length Alloy
Diameter, Thickness, Length Alloy
A
Pipe Size, in. per Joint Bolt Thread Steel, in.
A A A
in. in. Steel, in.
1 3 3 3 3
⁄2 ⁄4 41 ⁄16 ⁄4-10 UNC-2A not used 4 ⁄4
3 3 1 3
⁄4 ⁄4 41 ⁄4 ⁄4-10 UNC-2A not used 5
7 3 7 1
1 ⁄8 41 ⁄8 ⁄8-9 UNC-2A not used 5 ⁄2
1 1
1 ⁄4 14 1 ⁄2 1-8 UNC-2A not used 6
1 1 3 1 3
1 ⁄2 1 ⁄8 41 ⁄4 1 ⁄8-8 UN-2A not used 6 ⁄4
2 1 8 2 1-8 UNC-2A not used 7
1 1 1 1 3
2 ⁄2 1 ⁄8 82 ⁄4 1 ⁄8-8 UN-2A not used 7 ⁄4
1 5 1 3
31 ⁄4 82 ⁄8 1 ⁄4-8 UN-2A not used 8 ⁄4
1 1
41 ⁄2 83 1 ⁄2-8 UN-2A not used 10
3 5 3 3
51 ⁄4 83 ⁄8 1 ⁄4-8 UN-2A not used 11 ⁄4
1 1
62 8 4 ⁄4 2-8 UN-2A not used 13 ⁄2
8 2 12 5 2-8 UN-2A not used 15
1 1 1 1
10 2 ⁄2 12 6 ⁄2 2 ⁄2-8 UN-2A not used 19 ⁄4
3 1 3 1
12 2 ⁄4 12 7 ⁄4 2 ⁄4-8 UN-2A not used 21 ⁄4
A
1 in. = 25.4 mm.
TABLE 8 Bolting Lengths for 150-lb Bronze Flanged Joints to ASME B16.24 (see Fig. 1 and Fig. 2)
Bolt Flange Bolt Length Stud Bolt
Nominal Quantity Bolt Stud
Diameter, Thickness, Carbon Steel, Length
Pipe Size, in. per Joint Bolt Thread
A A A A
in. in. in. Carbon Steel, in.
1 1 5 1 1
⁄2 ⁄2 4 ⁄16 ⁄2-13 UNC-2A 1 ⁄2 2
3 1 11 1 3 1
⁄4 ⁄2 4 ⁄32 ⁄2-13 UNC-2A 1 ⁄4 2 ⁄4
1 3 1 3 1
1 ⁄2 4 ⁄8 ⁄2-13 UNC-2A 1 ⁄4 2 ⁄4
...