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Flanged Joint Pipe

Bolts, Nuts and Studs

Flanged joint pipe bolts, nuts and studs are not generally furnished by AMERICAN. The following is provided for information only.

Bolts are specified in ANSI B18.2.1 and nuts are specified in ANSI B18.2.2. Bolts and nuts of low-carbon steel conforming to ASTM A307 are specified in the Appendix of AWWA C110 and C115 for flanged pipe when rubber gaskets are used. Nuts of regular or heavy hex design are used according to customer specifications. Also, per the Appendix of AWWA C110 and C115, high-strength bolts should not be used when a gray iron flange is involved in the connection.

2 1 2 5 2 Flanged Standard Dimensions Print
Size
(in.)
BC
Bolt Circle1
(in.)
T
Thickness2
(in.)
Bolt Hole
Dia.
(in.)
Bolts and Studs Approx.
Weight
per Bolt
(lbs.)
No. per
Joint
Bolt Size
2
(in.)
Stud Size2
(in.)
Threads
per Inch
4 7.5 0.94 3/4 8 5/8 × 3 5/8 × 3 11 0.35
6 9.5 1 7/8 8 3/4 × 3 1/2 3/4 × 3 1/2 10 0.5
8 11.75 1.12 7/8 8 3/4 × 3 1/2 3/4 × 3 1/2 10 0.5
10 14.25 1.19 1 12 7/8 × 4 7/8 × 4 9 0.8
12 17 1.25 1 12 7/8 × 4 7/8 × 4 9 0.8
14 18.75 1.38 1 1/8 12 1 × 4 1/2 1 × 4 1/2 8 1.2
16 21.25 1.44 1 1/8 16 1 × 4 1/2 1 × 4 1/2 8 1.2
18 22.75 1.56 1 1/4 16 1 1/8 × 5 1 1/8 × 5 7 1.8
20 25 1.69 1 1/4 20 1 1/8 × 5 1 1/8 × 5 7 1.8
24 29.5 1.88 1 3/8 20 1 1/4 × 5 1/2 1 1/4 × 5 1/2 7 2.4
30 36 2.12 1 3/8 28 1 1/4 × 6 1/2 1 1/4 × 6 1/2 7 2.7
36 42.75 2.38 1 5/8 32 1 1/2 × 7 1 1/2 × 7 6 5.1
42 49.5 2.62 1 5/8 36 1 1/2 × 7 1/2 1 1/2 × 7 1/2 6 5.4
48 56 2.75 1 5/8 44 1 1/2 × 8 1 1/2 × 8 6 5.6
54 62.75 3 2 44 1 3/4 × 8 1/2 1 3/4 × 8 1/2 5 8.3
60 69.25 3.12 2 52 1 3/4 × 9 1 3/4 × 9 5 8.7
643 76 3.38 2 52 1 3/4 × 9 1 3/4 × 9 5 8.7
1.) Bolt circle and thickness tolerances are per AWWA C115.
2.) Bolts are hex-head machine bolts with regular or heavy hex nuts as specified. Studs with one hex nut each are required for tapped flanges. Bolts, studs and nuts are low-carbon steel per ASTM A307 Grade B; threads are ANSI B1.1 Coarse Thread Series, Class 2A external and Class 2B internal. Recommended studs are the same length as corresponding bolt length with “tap end” threaded approximately the same length as flange thickness.
3.) The dimensions of 64" flange correspond with applicable dimensions of 66" Class E flange in ANSI/AWWA C207, and 64" ductile iron flanges can be connected to those flanges.