Forged Flanges Studs

Reference data and engineering information about forged flanges studs for piping systems applications.

forgedflangesstuds

Overview

Engineering reference data for Forged Flanges Studs in piping systems.

Key Formulas

Continuity

$A_1 v_1 = A_2 v_2$

Mass conservation in pipe flow.

Pressure Drop

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Darcy-Weisbach equation.

Pipe Area

$A = \frac{\pi D^2}{4}$

Cross-sectional area of a pipe.

Variables

Symbol	Description	Unit
$D$	Pipe diameter	m
$v$	Flow velocity	m/s
$\Delta P$	Pressure drop	Pa
$f$	Friction factor	—

Stud Specifications for ANSI Forged Steel Flanges

The following tables provide stud numbers, diameters, and lengths for ANSI forged steel flanges across all standard pressure classes. These specifications apply to standard facing and standard pressure ratings flange to flange connections.

All dimensions are in inches. For metric conversion: 1 inch = 25.4 mm

Class 150

20 rows

Stud specifications for ANSI B16.5 Forged Steel Flanges - Class 150
NPS(in)	No. of Studs	Stud Diameter(in)	Stud Length(in)
1/2	4	1/2	2-1/2
3/4	4	1/2	2-1/2
1	4	1/2	2-3/4
1-1/4	4	1/2	2-3/4
1-1/2	4	1/2	3
2	4	5/8	3-1/2
2-1/2	4	5/8	3-3/4
3	4	5/8	3-3/4
3-1/2	8	5/8	3-3/4
4	8	5/8	3-3/4
5	8	3/4	4
6	8	3/4	4-1/4
8	8	3/4	4-1/2
10	12	7/8	4-3/4
12	12	7/8	5
14	12	1	5-1/2
16	16	1	5-1/2
18	16	1-1/8	6
20	20	1-1/8	6-1/2
24	20	1-1/4	7

Source: engineeringtoolbox.com

Class 300

20 rows

Stud specifications for ANSI B16.5 Forged Steel Flanges - Class 300
NPS(in)	No. of Studs	Stud Diameter(in)	Stud Length(in)
1/2	4	1/2	2-3/4
3/4	4	5/8	3-1/4
1	4	5/8	3-1/4
1-1/4	4	5/8	3-1/2
1-1/2	4	3/4	3-3/4
2	8	5/8	3-3/4
2-1/2	8	3/4	4-1/4
3	8	3/4	4-1/2
3-1/2	8	3/4	4-1/2
4	8	3/4	4-3/4
5	8	3/4	5
6	12	3/4	5
8	12	7/8	5-3/4
10	16	1	6-1/2
12	16	1-1/8	7
14	20	1-1/8	7-1/4
16	20	1-1/4	7-3/4
18	24	1-1/4	8
20	24	1-1/4	8-1/4
24	24	1-1/2	9-1/4

Source: engineeringtoolbox.com

Class 400

20 rows

Stud specifications for ANSI B16.5 Forged Steel Flanges - Class 400
NPS(in)	No. of Studs	Stud Diameter(in)	Stud Length(in)
1/2	4	1/2	3-1/4
3/4	4	5/8	3-3/4
1	4	5/8	3-3/4
1-1/4	4	5/8	4
1-1/2	4	3/4	4-1/2
2	8	5/8	4-1/2
2-1/2	8	3/4	5
3	8	3/4	5-1/4
3-1/2	8	7/8	5-3/4
4	8	7/8	5-3/4
5	8	7/8	6
6	12	7/8	6-1/4
8	12	1	7
10	16	1-1/8	7-3/4
12	16	1-1/4	8-1/4
14	20	1-1/4	8-1/2
16	20	1-3/8	9
18	24	1-3/8	9-1/4
20	24	1-1/2	9-3/4
24	24	1-3/4	10-3/4

Source: engineeringtoolbox.com

Class 600

20 rows

Stud specifications for ANSI B16.5 Forged Steel Flanges - Class 600
NPS(in)	No. of Studs	Stud Diameter(in)	Stud Length(in)
1/2	4	1/2	3-1/4
3/4	4	5/8	3-3/4
1	4	5/8	3-3/4
1-1/4	4	5/8	4
1-1/2	4	3/4	4-1/2
2	8	5/8	4-1/2
2-1/2	8	3/4	5
3	8	3/4	5-1/4
3-1/2	8	7/8	5-3/4
4	8	7/8	6
5	8	1	6-3/4
6	12	1	7
8	12	1-1/8	7-3/4
10	16	1-1/4	8-3/4
12	20	1-1/4	9
14	20	1-3/8	9-1/2
16	20	1-1/2	10-1/4
18	20	1-5/8	11
20	24	1-5/8	11-1/2
24	24	1-7/8	13

Source: engineeringtoolbox.com

Class 900

Interactive Charts

Carbon and Stainless Steel Flanges - ASME/ANSI Class 150

Stud specifications for ANSI B16.5 Forged Steel Flanges - Class 300

Stud specifications for ANSI B16.5 Forged Steel Flanges - Class 400

Stud specifications for ANSI B16.5 Forged Steel Flanges - Class 600

References

Original Source

Source: engineeringtoolbox.com