ASTM F704-81(2001)

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 ½ through 48-in. (12.7 through 1219-mm) diameter and pressure range of 125 through 2500 psi (0.8 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 the standard. The values given in parentheses are for information only.  
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 29-Jan-1981
• ICS: 21.060.10 - Bolts, screws, studs
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaces: ASTM F704-81(1996)E1 - Standard Practice for Selecting Bolting Lengths for Piping System Flanged Joints
• Effective Date: 30-Jan-1981
• Replaced By: ASTM F704-81(2009) - Standard Practice for Selecting Bolting Lengths for Piping System Flanged Joints
• Effective Date: 01-Jan-2009
• Referred By: ASTM F1155-10(2019) - Standard Practice for Selection and Application of Piping System Materials
• Effective Date: 30-Jan-1981

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: F 704 – 81 (Reapproved 2001)
Standard Practice for
Selecting Bolting Lengths for Piping System Flanged
Joints
This standard is issued under the fixed designation F 704; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Bolting Criteria
1.1 This practice covers bolt and stud bolt lengths, quanti- 3.1 Bolt and stud bolt lengths are computed using the
ties, and thread series for pipe to pipe and pipe to valve flanged following (see Annex A1):
joints (Note 1) in the nominal pipe size ranges of ⁄2- through 3.1.1 Includes maximum nut thickness in accordance with
48-in.(12.7-through1219-mm)diameterandpressurerangeof ANSI B18.2.2.
125 through 2500 psi (0.8 through 17 236 kPa). 3.1.2 Does not include washer thickness.
3.1.3 Does not include bolt or stud bolt point height.
NOTE 1—This is applicable when flange of valve has the same
3.1.4 Includes allowance for up to ⁄8-in. (3.2-mm) thick
thickness as mating flange.
gaskets, except butterfly valves.
1.2 The values stated in inch-pound units are to be regarded
3.1.5 Includes ⁄4-in. (6.3-mm) raised face in addition to
as the standard. The values given in parentheses are for
flange thickness listed in tables for flanges rated at 400 psi (2.8
information only.
kPa) and above.
1.3 This standard does not purport to address all of the
3.1.6 Includes use of heavy hex nut and bolt design.
safety concerns, if any, associated with its use. It is the
3.1.7 Includes plus tolerance for flange thickness in accor-
responsibility of the user of this standard to establish appro-
dance with ANSI B16.5.
priate safety and health practices and determine the applica-
3.2 All bolts and stud bolts have threads in accordance with
bility of regulatory limitations prior to use.
ANSI B1.1, Class 2A dimensioning and nuts Class 2B.
3.3 The material requirements for bolts, stud bolts, and nuts
2. Referenced Documents
are obtained from the material specifications of individual
2.1 ANSI Standards:
system diagrams.
B1.1 Unified Screw Threads
3.4 Alloy steel bolting 1-in. (25.4-mm) nominal diameter
B16.1 Cast Iron Pipe Flanges and Flanged Fittings (25, 125,
and smaller and all carbon steel bolting has threads of the UNC
250, and 800 lb)
Series; alloy steel bolting above 1-in. nominal diameter has
B16.5 Steel Pipe Flanges and Flanged Fittings (150, 300,
threads of the 8-UN Series.
400, 600, 900, 1500, and 2500 lb Including Reference to
3.5 For detailed descriptions of flange bolting assemblies,
Valves)
butterfly valve bolting assemblies, and tapped lug-type butter-
B16.24 Bronze Flanges and Flanged Fittings (150 and 300
fly valve bolting assemblies, refer to Figs. 1–7.
lb)
B18.2.1 Square and Hex Bolts and Screws
4. List of Tables
B18.2.2 Square and Hex Nuts
4.1 The tables are arranged in the following sequence:
2.2 Other Standard:
150-lb Steel Flanged Joints Table 1
MSS SP-44 Steel Pipe Flanges
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
This practice is under the jurisdiction of ASTM Committee F25 on Ships and 1500-lb Steel Flanged Joints Table 6
Marine Technology and is the direct responsibility of Subcommittee F25.11 on 2500-lb Steel Flanged Joints Table 7
Machinery and Piping Systems. 150-lb Bronze Flanged Joints Table 8
300-lb Bronze Flanged Joints Table 9
Current edition approved Jan. 30, 1981. Published July 1981.
150-lb Steel Flat Face to 150-lb Table 10
Available from American National Standards Institute, 25 W. 43rd St., 4th
Bronze Flanged Joints
Floor, New York, NY 10036.
300-lb Steel Flat Face to 300-lb Table 11
Available from Manufacturer’s Standardization Society of the Valve and
Bronze Flanged Joints
Fittings Industry, 1815 N. Fort Myer Dr., Arlington, VA 22209.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 704 – 81 (2001)
125-lb Cast Iron to 150-lb Steel Flat Table 12 Bolting Lengths for Tapped Lug- Table 18
Face Flanged Joints Type Butterfly Valve and 150 lb
250-lb Cast Iron to 300-lb Steel Flat Table 13 Bronze Flanges to ANSI B16.24
Face Flanged Joints
800-lb Cast Iron to 600-lb Steel Table 14
Flanged Joints
Wafer-Type Butterfly Valve and Table 15
5. Keywords
150-lb Steel Flanges
Wafer-Type Butterfly Valve and Table 16
5.1 bolting lengths; cover bolt; flange joint(s); marine tech-
150-lb Bronze Flanges
Bolting Lengths for Tapped Lug- Table 17
nology; ships; stud bolts
Type Butterfly Valve and 150-lb
Steel Flanges to ANSI B16.5
TABLE 1 Bolting Lengths for 150-lb Steel Flanged Joints to ANSI B16.5 and MSS SP-44 (see Fig. 1 and Fig. 2)
Bolt Bolt Length Stud Bolt
Nominal Diameter, Flange Carbon Length
Quantity Bolt Stud
A
Pipe Size, in. Thickness, Steel, Car-
per Joint Bolt Thread
A A
in. in. in. bon Steel,
A
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 3
18 1 ⁄8 16 1 ⁄16 1 ⁄8-7 UNC-2A ⁄4 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.
TABLE 2 Bolting Lengths for 300-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 1 and Fig. 2)
Nominal Bolt Bolt Length Stud Bolt
Pipe Size, Diameter, Flange Carbon Length
Quantity Bolt Stud
A
in. in. Thickness, Steel, Car-
per Joint Bolt Thread
A A
in. in. bon Steel,
A
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
F 704 – 81 (2001)
TABLE 2 Continued
Nominal Bolt Bolt Length Stud Bolt
Pipe Size, Diameter, Flange Carbon Length
Quantity Bolt Stud
A
in. in. Thickness, Steel, Car-
per Joint Bolt Thread
A A
in. in. bon Steel,
A
in.
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 ANSI B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Bolt Length
Pipe Size, Diameter, Quantity Thickness, Bolt Stud Length
Alloy
A A
in. in. per Joint in. Bolt Thread Alloy
A
Steel, in.
A
Steel, in.
B B BBB B
⁄2
3 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
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.
TABLE 4 Bolting Lengths for 600-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Bolt Length
Pipe Size, Diameter, Quantity Thickness, Bolt Stud Length
Alloy
A A
in. in. per Joint in. Bolt Thread Alloy
A
Steel, in.
A
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.
F 704 – 81 (2001)
TABLE 5 Bolting Lengths for 900-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Bolt Length
Pipe Size, Diameter, Quantity Thickness, Bolt Stud Length
Alloy
A A
in. in. per Joint in. Bolt Thread Alloy
A
Steel, in.
A
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.
TABLE 6 Bolting Lengths for 1500-lb Steel Flanged Joints to ANSI B16.5 (see Fig. 3 and Fig. 4)
Nominal Bolt Flange Stud Bolt
Bolt Length
Pipe Size, Diameter, Quantity Thickness, Bolt Stud Length
Alloy
A A
in. in. per Joint in. Bolt Thread Alloy
A
Steel, in.
A
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
10 1 ⁄8 12 4 ⁄4 1 ⁄8-8 UN-2A not used 13 1 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 ANSI B16.5 (see Fig. 3 and Fig. 4)
Bolt Flange Stud Bolt
Nominal Bolt Length
Diameter, Quantity Thickness, Bolt Stud Length
Pipe Size, Alloy
A A
in. per Joint in. Bolt Thread Alloy
A
in. Steel, in.
A
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
F 704 – 81 (2001)
TABLE 7 Continued
Bolt Flange Stud Bolt
Nominal Bolt Length
Diameter, Quantity Thickness, Bolt Stud Length
Pipe Size, Alloy
A A
in. per Joint in. Bolt Thread Alloy
A
in. Steel, in.
A
Steel, in.
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 ANSI B16.24 (see Fig. 1 and Fig. 2)
Bolt Flange Bolt Length Stud Bolt
Nominal Diameter, Thickness, Carbon Length
Quantity Bolt Stud
A A
Pipe Size, in. in. Steel, Car-
per Joint Bolt Thread
A
in. in. bon Steel,
A
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
1 1 13 1 3 1
1 ⁄4 ⁄2 4 ⁄32 ⁄2-13 UNC-2A 1 ⁄4 2 ⁄4
1 1 7 1 3 1
1 ⁄2 ⁄2 4 ⁄16 ⁄2-13 UNC-2A 1 ⁄4 2 ⁄4
5 1 5 3
2 ⁄8 4 ⁄2 ⁄8-11 UNC-2A 2 2 ⁄4
1 5 9 5 1 3
2 ⁄2 ⁄8 4 ⁄16 ⁄8-11 UNC-2A 2 ⁄4 2 ⁄4
5 5 5 1
3 ⁄8 4 ⁄8 ⁄8-11 UNC-2A 2 ⁄4 3
1 5 11 5 1
3 ⁄2 ⁄8 8 ⁄16 ⁄8-11 UNC-2A 2 ⁄2 3
5 11 5 1
4 ⁄8 8 ⁄16 ⁄8-11 UNC-2A 2 ⁄2 3
3 3 3 3 1
5 ⁄4 8 ⁄4 ⁄4-10 UNC-2A 2 ⁄4 3 ⁄2
3 13 3 1
6 ⁄4 8 ⁄16 ⁄4-10 UNC-2A 3 3 ⁄2
3 15 3 1 3
8 ⁄4 8 ⁄16 ⁄4-10 UNC-2A 3 ⁄4 3 ⁄4
7 7 1 1
10 ⁄8 12 1 ⁄8-9 UNC-2A 3 ⁄2 4 ⁄4
7 1 7 1 1
12 ⁄8 12 1 ⁄6 ⁄8-9 UNC-2A 3 ⁄2 4 ⁄4
A
1 in. = 25.4 mm.
TABLE 9 Bolting Length
...