Alloy steel flanges are essential components in piping systems that are used to connect pipes, valves, pumps, and other equipment. These flanges are made from alloy steel materials, which provide enhanced strength, corrosion resistance, and high-temperature performance compared to standard carbon steel flanges. Alloy steel flanges are designed to provide a secure and leak-resistant connection while allowing easy disassembly and maintenance. Alloy Steel Flanges weight dimensions are in kg.
A flange casting is typically a cast ring designed to connect the parts of a pipe or other machinery which requires a connecting joint. Most cast options are outdated and flanges provided to modern specifications are made from alloy steel. Before you buy flanges, it is important to note that these flanges come in different measurements, diameters, sizes, types, and materials. Several types of flanges are available for different types of uses. Therefore, you have to choose your product on a per-project basis. When we talk about the materials to use in your applications, a range of factors come into play. Therefore, some crucial aspects that are required to be considered while buying alloy steel flanges. Alloy steel flanges are available in a wide range of sizes, from small diameters for low-pressure applications to large diameters for high-pressure systems. For detailed measurements of alloy steel flanges, refer to weight and dimensions chart PDF given in mm, kg below.
Alloy Steel Flanges specifications are accessible in numerous grades and classes like Class 150, Class 300, Class 400, Class 600, Class 900 and Class 2500. Alloy steel flanges must conform to specific industry standards and specifications, such as ASTM (American Society for Testing and Materials) standards, ASME (American Society of Mechanical Engineers) standards, and ANSI (American National Standards Institute) standards. These standards define material grades, dimensions, pressure ratings, and testing requirements. Refer to Alloy Steel Weight and Dimensions Chart PDF for detailed specifications.
Nominal Pipe Size (inches) |
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Diameter of Flange (inches) |
No. of Bolts |
Diameter of Bolts (inches) |
Diameter of Bolt Holes (inches) |
Bolt Circle (inches) |
|
1/4 | 3-3/8 | 4 | 1/2 | 0.62 | 2-1/4 |
1/2 | 3-1/2 | 4 | 1/2 | 0.62 | 2-3/8 |
3/4 | 3-7/8 | 4 | 1/2 | 0.62 | 2-3/4 |
1 | 4-1/4 | 4 | 1/2 | 0.62 | 3-1/8 |
1-1/4 | 4-5/8 | 4 | 1/2 | 0.62 | 3-1/2 |
1-1/2 | 5 | 4 | 1/2 | 0.62 | 3-7/8 |
2 | 6 | 4 | 5/8 | 0.75 | 4-3/4 |
2-1/2 | 7 | 4 | 5/8 | 0.75 | 5-1/2 |
3 | 7-1/2 | 4 | 5/8 | 0.75 | 6 |
3-1/2 | 8-1/2 | 8 | 5/8 | 0.75 | 7 |
4 | 9 | 8 | 5/8 | 0.75 | 7-1/2 |
5 | 10 | 8 | 3/4 | 0.88 | 8-1/2 |
6 | 11 | 8 | 3/4 | 0.88 | 9-1/2 |
8 | 13-1/2 | 8 | 3/4 | 0.88 | 11-3/4 |
10 | 16 | 12 | 7/8 | 1 | 14-1/4 |
12 | 19 | 12 | 7/8 | 1 | 17 |
14 | 21 | 12 | 1 | 1.12 | 18-3/4 |
16 | 23-1/2 | 16 | 1 | 1.12 | 21-1/4 |
18 | 25 | 16 | 1-1/8 | 1.25 | 22-3/4 |
20 | 27-1/2 | 20 | 1-1/8 | 1.25 | 25 |
24 | 32 | 20 | 1-1/4 | 1.38 | 29-1/2 |
Nominal Pipe Size NPS (inches) |
|
||||
---|---|---|---|---|---|
Diameter of Flange (inches) |
No. of Bolts |
Diameter of Bolts (inches) |
Diameter of Bolt Holes (inches) |
Bolt Circle (inches) |
|
1/4 | 3-3/8 | 4 | 1/2 | 0.62 | 2-1/4 |
1/2 | 3-3/4 | 4 | 1/2 | 0.62 | 2-5/8 |
3/4 | 4-5/8 | 4 | 5/8 | 0.75 | 3-1/4 |
1 | 4-7/8 | 4 | 5/8 | 0.75 | 3-1/2 |
1-1/4 | 5-1/4 | 4 | 5/8 | 0.75 | 3-7/8 |
1-1/2 | 6-1/8 | 4 | 3/4 | 0.88 | 4-1/2 |
2 | 6-1/2 | 8 | 5/8 | 0.75 | 5 |
2-1/2 | 7-1/2 | 8 | 3/4 | 0.88 | 5-7/8 |
3 | 8-1/4 | 8 | 3/4 | 0.88 | 6-5/8 |
3-1/2 | 9 | 8 | 3/4 | 0.88 | 7-1/4 |
4 | 10 | 8 | 3/4 | 0.88 | 7-7/8 |
5 | 11 | 8 | 3/4 | 0.88 | 9-1/4 |
6 | 12-1/2 | 12 | 3/4 | 0.88 | 10-5/8 |
8 | 15 | 12 | 7/8 | 1 | 13 |
10 | 17-1/2 | 16 | 1 | 1.12 | 15-1/4 |
12 | 20-1/2 | 16 | 1-1/8 | 1.25 | 17-3/4 |
14 | 23 | 20 | 1-1/8 | 1.25 | 20-1/4 |
16 | 25-1/2 | 20 | 1-1/4 | 1.38 | 22-1/2 |
18 | 28 | 24 | 1-1/4 | 1.38 | 24-3/4 |
20 | 30-1/2 | 24 | 1-1/4 | 1.38 | 27 |
24 | 36 | 24 | 1-1/2 | 1.62 | 32 |
Nominal Pipe Size NPS (inches) |
|
||||
---|---|---|---|---|---|
Diameter of Flange (inches) |
No. of Bolts |
Diameter of Bolts (inches) |
Diameter of Bolt Holes (inches) |
Bolt Circle (inches) |
|
1/4 | 3-3/8 | 4 | 1/2 | 0.62 | 2-1/4 |
1/2 | 3-3/4 | 4 | 1/2 | 0.62 | 2-5/8 |
3/4 | 4-5/8 | 4 | 5/8 | 0.75 | 3-1/4 |
1 | 4-7/8 | 4 | 5/8 | 0.75 | 3-1/2 |
1-1/4 | 5-1/4 | 4 | 5/8 | 0.75 | 3-7/8 |
1-1/2 | 6-1/8 | 4 | 3/4 | 0.88 | 4-1/2 |
2 | 6-1/2 | 8 | 5/8 | 0.75 | 5 |
2-1/2 | 7-1/2 | 8 | 3/4 | 0.88 | 5-7/8 |
3 | 8-1/4 | 8 | 3/4 | 0.88 | 6-5/8 |
3-1/2 | 9 | 8 | 7/8 | 1 | 7-1/4 |
4 | 10 | 8 | 7/8 | 1 | 7-7/8 |
5 | 11 | 8 | 7/8 | 1 | 9-1/4 |
6 | 12-1/2 | 12 | 7/8 | 1 | 10-5/8 |
8 | 15 | 12 | 1 | 1.12 | 13 |
10 | 17-1/2 | 16 | 1-1/8 | 1.25 | 15-1/4 |
12 | 20-1/2 | 16 | 1-1/4 | 1.38 | 17-3/4 |
14 | 23 | 20 | 1-1/4 | 1.38 | 20-1/4 |
16 | 25-1/2 | 20 | 1-3/8 | 1.5 | 22-1/2 |
18 | 28 | 24 | 1-3/8 | 1.5 | 24-3/4 |
20 | 30-1/2 | 24 | 1-1/2 | 1.62 | 27 |
24 | 36 | 24 | 1-3/4 | 1.88 | 32 |
Nominal Pipe Size NPS (inches) |
|
||||
---|---|---|---|---|---|
Diameter of Flange (inches) |
No. of Bolts |
Diameter of Bolts (inches) |
Diameter of Bolt Holes (inches) |
Bolt Circle (inches) |
|
1/4 | 3-3/8 | 4 | 1/2 | 0.62 | 2-1/4 |
1/2 | 3-3/4 | 4 | 1/2 | 0.62 | 2-5/8 |
3/4 | 4-5/8 | 4 | 5/8 | 0.75 | 3-1/4 |
1 | 4-7/8 | 4 | 5/8 | 0.75 | 3-1/2 |
1-1/4 | 5-1/4 | 4 | 5/8 | 0.75 | 3-7/8 |
1-1/2 | 6-1/8 | 4 | 3/4 | 0.88 | 4-1/2 |
2 | 6-1/2 | 8 | 5/8 | 0.75 | 5 |
2-1/2 | 7-1/2 | 8 | 3/4 | 0.88 | 5-7/8 |
3 | 8-1/4 | 8 | 3/4 | 0.88 | 6-5/8 |
3-1/2 | 9 | 8 | 7/8 | 1 | 7-1/4 |
4 | 10-3/4 | 8 | 7/8 | 1 | 8-1/2 |
5 | 13 | 8 | 1 | 1.12 | 10-1/2 |
6 | 14 | 12 | 1 | 1.12 | 11-1/2 |
8 | 16-1/2 | 12 | 1-1/8 | 1.25 | 13-3/4 |
10 | 20 | 16 | 1-1/4 | 1.38 | 17 |
12 | 22 | 20 | 1-1/4 | 1.38 | 19-1/4 |
14 | 23-3/4 | 20 | 1-3/8 | 1.5 | 20-3/4 |
16 | 27 | 20 | 1-1/2 | 1.62 | 23-3/4 |
18 | 29-1/4 | 20 | 1-5/8 | 1.75 | 25-3/4 |
20 | 32 | 24 | 1-5/8 | 1.75 | 28-1/2 |
24 | 37 | 24 | 1-7/8 | 2 | 33 |
Nominal Pipe Size NPS (inches) |
|
||||
---|---|---|---|---|---|
Diameter of Flange (inches) |
No. of Bolts |
Diameter of Bolts (inches) |
Diameter of Bolt Holes (inches) |
Bolt Circle (inches) |
|
1/2 | 4-3/4 | 4 | 3/4 | 0.88 | 3-1/4 |
3/4 | 5-1/8 | 4 | 3/4 | 0.88 | 3-1/2 |
1 | 5-7/8 | 4 | 7/8 | 1 | 4 |
1-1/4 | 6-1/4 | 4 | 7/8 | 1 | 4-3/8 |
1-1/2 | 7 | 4 | 1 | 1.12 | 4-7/8 |
2 | 8-1/2 | 8 | 7/8 | 1 | 6-1/2 |
2-1/2 | 9-5/8 | 8 | 1 | 1.12 | 7-1/2 |
3 | 9-1/2 | 8 | 7/8 | 1 | 7-1/2 |
4 | 11-1/2 | 8 | 1-1/8 | 1.25 | 9-1/4 |
5 | 13-3/4 | 8 | 1-1/4 | 1.38 | 11 |
6 | 15 | 12 | 1-1/8 | 1.25 | 12-1/2 |
8 | 18-1/2 | 12 | 1-3/8 | 1.5 | 15-1/2 |
10 | 21-1/2 | 16 | 1-3/8 | 1.5 | 18-1/2 |
12 | 24 | 20 | 1-3/8 | 1.5 | 21 |
14 | 25-1/4 | 20 | 1-1/2 | 1.62 | 22 |
16 | 27-3/4 | 20 | 1-5/8 | 1.75 | 24-1/2 |
18 | 31 | 20 | 1-7/8 | 2 | 27 |
20 | 33-3/4 | 20 | 2 | 2.12 | 29-1/2 |
24 | 41 | 20 | 2-1/2 | 2.62 | 35-1/2 |
Nominal Pipe Size NPS (inches) |
|
||||
---|---|---|---|---|---|
Diameter of Flange (inches) |
No. of Bolts |
Diameter of Bolts (inches) |
Diameter of Bolt Holes (inches) |
Bolt Circle (inches) |
|
1/2 | 5-1/4 | 4 | 3/4 | 0.88 | 3-1/2 |
3/4 | 5-1/2 | 4 | 3/4 | 0.88 | 3-3/4 |
1 | 6-1/4 | 4 | 7/8 | 1 | 4-1/4 |
1-1/4 | 7-1/4 | 4 | 1 | 1.12 | 5-1/8 |
1-1/2 | 8 | 4 | 1-1/8 | 1.25 | 5-3/4 |
2 | 9-1/4 | 8 | 1 | 1.12 | 6-3/4 |
2-1/2 | 10-1/2 | 8 | 1-1/8 | 1.25 | 7-3/4 |
3 | 12 | 8 | 1-1/4 | 1.38 | 9 |
4 | 14 | 8 | 1-1/2 | 1.62 | 10-3/4 |
5 | 16-1/2 | 8 | 1-3/4 | 1.88 | 12-3/4 |
6 | 19 | 8 | 2 | 2.12 | 14-1/2 |
8 | 21-3/4 | 12 | 2 | 2.12 | 17-1/4 |
10 | 26-1/2 | 12 | 2-1/2 | 2.62 | 21-1/4 |
12 | 30 | 12 | 2-3/4 | 2.88 | 24-3/8 |