ANSI / ASME B16.5 Class 400 Threaded Flange Dimensions
Threaded flanges are commonly used in pipe connections where welding is not possible, such as in certain environments, hazardous conditions, or during maintenance. They are often used in industries like oil, natural gas, chemical processing, and petrochemicals.
ANSI / ASME B16.5 Class 400 Threaded Flange
Class 400 Threaded Flange Dimensions in inch/lbs
Class 400 Threaded Flange Dimensions in mm/kg
Class 400 Threaded Flange Dimensions in inch/lbs
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Hub Diameter (X) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 3.75 | 0.56 | 1.38 | 0.88 | 1.50 | 2 | 2.63 | 4 | 0.63 |
| 3/4 | 4.63 | 0.63 | 1.69 | 1.00 | 1.88 | 3 | 3.25 | 4 | 0.75 |
| 1 | 4.88 | 0.69 | 2.00 | 1.06 | 2.13 | 4 | 3.50 | 4 | 0.75 |
| 1 1/4 | 5.25 | 0.81 | 2.50 | 1.13 | 2.50 | 5 | 3.88 | 4 | 0.75 |
| 1 1/2 | 6.13 | 0.88 | 2.88 | 1.25 | 2.75 | 7 | 4.50 | 4 | 0.88 |
| 2 | 6.50 | 1.00 | 3.63 | 1.44 | 3.31 | 9 | 5.00 | 8 | 0.75 |
| 2 1/2 | 7.50 | 1.13 | 4.13 | 1.63 | 3.94 | 13 | 5.88 | 8 | 0.88 |
| 3 | 8.25 | 1.25 | 5.00 | 1.81 | 4.63 | 16 | 6.63 | 8 | 0.88 |
| 3 1/2 | 9.00 | 1.38 | 5.50 | 1.94 | 5.25 | 21 | 7.25 | 8 | 1.00 |
| 4 | 10.00 | 1.38 | 6.19 | 2.00 | 5.75 | 26 | 7.88 | 8 | 1.00 |
| 5 | 11.00 | 1.50 | 7.31 | 2.13 | 7.00 | 31 | 9.25 | 8 | 1.00 |
| 6 | 12.50 | 1.63 | 8.50 | 2.25 | 8.13 | 44 | 10.63 | 12 | 1.00 |
| 8 | 15.00 | 1.88 | 10.63 | 2.69 | 10.25 | 67 | 13.00 | 12 | 1.13 |
| 10 | 17.50 | 2.13 | 12.75 | 2.88 | 12.63 | 91 | 15.25 | 16 | 1.25 |
| 12 | 20.50 | 2.25 | 15.00 | 3.13 | 14.75 | 130 | 17.75 | 16 | 1.38 |
| 14 | 23.00 | 2.38 | 16.25 | 3.31 | 16.75 | 180 | 20.25 | 20 | 1.38 |
| 16 | 25.50 | 2.50 | 18.50 | 3.69 | 19.00 | 235 | 22.50 | 20 | 1.50 |
| 18 | 28.00 | 2.63 | 21.00 | 3.88 | 21.00 | 285 | 24.75 | 24 | 1.50 |
| 20 | 30.50 | 2.75 | 23.00 | 4.00 | 23.13 | 345 | 27.00 | 24 | 1.63 |
| 22 | 33.00 | 2.88 | 25.25 | 4.25 | 25.25 | 405 | 29.25 | 24 | 1.75 |
| 24 | 36.00 | 3.00 | 27.25 | 4.50 | 27.63 | 510 | 32.00 | 24 | 1.88 |
Class 400 Threaded Flange Dimensions in mm/kg
| Nominal Pipe Size | Outside Diameter (O) | Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Hub Diameter (X) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 95.25 | 14.22 | 35.05 | 22.35 | 38.10 | 0.91 | 66.80 | 4 | 16.00 |
| 3/4 | 117.60 | 16.00 | 42.93 | 25.40 | 47.75 | 1.36 | 82.55 | 4 | 19.05 |
| 1 | 123.95 | 17.53 | 50.80 | 26.92 | 54.10 | 1.81 | 88.90 | 4 | 19.05 |
| 1 1/4 | 133.35 | 20.57 | 63.50 | 28.70 | 63.50 | 2.27 | 98.55 | 4 | 19.05 |
| 1 1/2 | 155.70 | 22.35 | 73.15 | 31.75 | 69.85 | 3.18 | 114.30 | 4 | 22.35 |
| 2 | 165.10 | 25.40 | 92.20 | 36.58 | 84.07 | 4.08 | 127.00 | 8 | 19.05 |
| 2 1/2 | 190.50 | 28.70 | 104.90 | 41.40 | 100.08 | 5.90 | 149.35 | 8 | 22.35 |
| 3 | 209.55 | 31.75 | 127.00 | 45.97 | 117.60 | 7.26 | 168.40 | 8 | 22.35 |
| 3 1/2 | 228.60 | 35.05 | 139.70 | 49.28 | 133.35 | 9.53 | 184.15 | 8 | 25.40 |
| 4 | 254.00 | 35.05 | 157.23 | 50.80 | 146.05 | 11.79 | 200.15 | 8 | 25.40 |
| 5 | 279.40 | 38.10 | 185.67 | 54.10 | 177.80 | 14.06 | 234.95 | 8 | 25.40 |
| 6 | 317.50 | 41.40 | 215.90 | 57.15 | 206.50 | 19.96 | 270.00 | 12 | 25.40 |
| 8 | 381.00 | 47.75 | 270.00 | 68.33 | 260.35 | 30.39 | 330.20 | 12 | 28.70 |
| 10 | 444.50 | 54.10 | 323.85 | 73.15 | 320.80 | 41.28 | 387.35 | 16 | 31.75 |
| 12 | 520.70 | 57.15 | 381.00 | 79.50 | 374.65 | 58.97 | 450.85 | 16 | 35.05 |
| 14 | 584.20 | 60.45 | 412.75 | 84.07 | 425.45 | 81.65 | 514.35 | 20 | 35.05 |
| 16 | 647.70 | 63.50 | 469.90 | 93.73 | 482.60 | 106.59 | 571.50 | 20 | 38.10 |
| 18 | 711.20 | 66.80 | 533.40 | 98.55 | 533.40 | 129.27 | 628.65 | 24 | 38.10 |
| 20 | 774.70 | 69.85 | 584.20 | 101.60 | 587.50 | 156.49 | 685.80 | 24 | 41.40 |
| 22 | 838.20 | 73.15 | 641.35 | 107.95 | 641.35 | 183.70 | 742.95 | 24 | 44.45 |
| 24 | 914.40 | 76.20 | 692.15 | 114.30 | 701.80 | 231.33 | 812.80 | 24 | 47.75 |
Key Features
- Pressure Rating: Class 400, suitable for higher-pressure systems, with specific pressure values varying with temperature.
- Size Range: Typically ranges from 1/2 inch to 24 inches, with specific sizes selected based on pipeline requirements.
- Materials: Common materials include carbon steel, stainless steel, alloy steel, etc., chosen based on the application environment.
- Threaded Connection: Connects to the pipe via threads, eliminating the need for welding and making installation and disassembly convenient.
Considerations
- Suitable for medium-pressure systems, not recommended for extremely high-pressure or high-vibration environments.
- Ensure proper sealing of the threaded connection to avoid leaks.
- Material selection should consider the corrosiveness of the medium and temperature conditions.
The ANSI/ASME B16.5 Class 400 Threaded Flange is a standardized threaded flange suitable for higher-pressure systems and applications requiring frequent disassembly. It offers advantages such as easy installation and cost-effectiveness, making it widely used in industries such as oil and gas, chemical, and power.
For more technical support, please contact SSM.
FAQ
It is a type of flange that conforms to the ANSI/ASME B16.5 standard, designed for pipelines requiring a pressure rating of Class 400. It uses a threaded connection to attach to the pipe, eliminating the need for welding.
- Sizes typically range from 1/2 inch to 24 inches, depending on the pipeline requirements and the ANSI/ASME B16.5 standard specifications.
- They are not recommended for extremely high-pressure or high-vibration environments.
- Threaded connections may require additional sealing measures to prevent leaks.
- Not ideal for large-diameter pipes (typically above 2 inches).
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