Weld Neck Flanges Dimensions
Weld neck flanges have a neck that can be adjusted to change the pipe tension location. To lessen this pressure, the flange can help lower the total pressure that builds up at its bottom. This flange’s tapered neck and hub makes it easy to recognise and locate them.
The flange’s neck is intended to provide shielding in high-pressure and significant temperature changes from high to low. The neck directly exits the pipe and travels through the thickness of the wall. The weld neck flange dimensions are essential for the pipe system to be compatible and fit well.
These flanges are mostly used in:
- Ship Building and Maritime
- Pharmaceutical Industries
- Power Generation
- Food Processing
- Petrochem Industries
- Oil and Gas Industries
Welding Neck Flange Dimensions
- 300 Lb Weld Neck Flange Dimensions
300 lb weld neck flange dimensions are crucial for high-pressure piping systems. With pressure ratings up to 300 pounds, these flanges ensure a secure connection between pipes in industries like oil, gas, and chemical processing.
Their dimensions, including nominal size, diameter, bolt circle, and thickness, are meticulously specified to meet stringent standards and ensure reliable performance in demanding applications.
| Nominal Pipe Size |
Outside Diameter of Flange (O) |
Thick nessof Flange (C) |
Diameter of Raised Face (R) |
Diameter of Hub at Base (X) |
Diameter of Hub at End (A) |
Length thru Hub (V) |
No of Holes |
Diameter of Holes (H) |
Diameter of Bolts |
Diameter of Bolt Circle (B) |
| 1/2 | 95.3 | 14.2 | 35.1 | 38.1 | 21.3 | 52.3 | 4 | 15.7 | 1/2 | 66.5 |
| 3/4 | 117.3 | 15.7 | 42.9 | 47.8 | 26.7 | 57.2 | 4 | 19.1 | 5/8 | 82.6 |
| 1 | 124 | 17.5 | 50.8 | 53.8 | 33.5 | 62 | 4 | 19.1 | 5/8 | 88.9 |
| 1-1/4 | 133.4 | 19.1 | 63.5 | 63.5 | 42.2 | 65 | 4 | 19.1 | 5/8 | 98.6 |
| 1-1/2 | 155.4 | 20.6 | 73.2 | 69.9 | 48.3 | 68.3 | 4 | 22.4 | 3/4 | 114.3 |
| 2 | 165.1 | 22.4 | 91.9 | 84.1 | 60.5 | 69.9 | 8 | 19.1 | 5/8 | 127 |
| 2-1/2 | 190.5 | 25.4 | 104.6 | 100.1 | 73.2 | 76.2 | 8 | 22.4 | 3/4 | 149.4 |
| 3 | 209.6 | 28.4 | 127 | 117.3 | 88.9 | 79.2 | 8 | 22.4 | 3/4 | 168.1 |
| 3-1/2 | 228.6 | 30.2 | 139.7 | 133.4 | 101.6 | 81 | 8 | 22.4 | 3/4 | 184.2 |
| 4 | 254 | 31.8 | 157.2 | 146.1 | 114.3 | 85.9 | 8 | 22.4 | 3/4 | 200.2 |
| 5 | 279.4 | 35.1 | 185.7 | 177.8 | 141.2 | 98.6 | 8 | 22.4 | 3/4 | 235 |
| 6 | 317.5 | 36.6 | 215.9 | 206.2 | 168.4 | 98.6 | 12 | 22.4 | 3/4 | 269.7 |
| 8 | 381 | 41.1 | 269.7 | 260.4 | 219.2 | 111.3 | 12 | 25.4 | 7/8 | 330.2 |
| 10 | 444.5 | 47.8 | 323.9 | 320.5 | 273.1 | 117.3 | 16 | 28.4 | 1 | 387.4 |
| 12 | 520.7 | 50.8 | 381 | 374.7 | 323.9 | 130 | 16 | 31.8 | 1-1/8 | 450.9 |
| 14 | 584.2 | 53.8 | 412.8 | 425.5 | 355.6 | 142.7 | 20 | 31.8 | 1-1/8 | 514.4 |
| 16 | 647.7 | 57.2 | 469.9 | 482.6 | 406.4 | 146.1 | 20 | 35.1 | 1-1/4 | 571.8 |
| 18 | 711.2 | 60.5 | 533.4 | 533.4 | 457.2 | 158.8 | 24 | 35.1 | 1-1/4 | 628.7 |
| 20 | 774.7 | 63.5 | 584.2 | 587.2 | 508 | 162.1 | 24 | 35.1 | 1-1/4 | 685.8 |
| 24 | 914.4 | 69.9 | 692.2 | 701.5 | 609.6 | 168.1 | 24 | 41.1 | 38.1 | 812.8 |
- 4 150 Weld Neck Flange Dimensions
The 4 150 weld neck flange dimensions refer to a flange with a nominal size of 4 inches and a pressure rating of 150 pounds. These flanges are commonly used in piping systems for applications requiring moderate pressure handling, such as water supply, HVAC systems, and general industrial processes. Their dimensions ensure compatibility and secure connections within the piping network.
| Nominal Pipe Size |
Outside Diameter of Flange (O) |
Thick nessof Flange (C) |
Diameter of Raised Face (R) |
Diameter of Hub at Base (X) |
Diameter of Hub at End (A) |
Length thru Hub (V) |
No of Holes |
Diameter of Holes (H) |
Diameter of Bolts |
Diameter of Bolt Circle (B) |
| 1/2 | 88.9 | 11.2 | 35.1 | 30.2 | 21.3 | 47.8 | 4 | 15.7 | 1/2 | 60.5 |
| 3/4 | 98.6 | 12.7 | 42.9 | 38.1 | 26.7 | 52.3 | 4 | 15.7 | 1/2 | 69.9 |
| 1 | 108 | 14.2 | 50.8 | 49.3 | 33.5 | 55.6 | 4 | 15.7 | 1/2 | 79.2 |
| 1-1/4 | 117.3 | 15.7 | 63.5 | 58.7 | 42.2 | 57.2 | 4 | 15.7 | 1/2 | 88.9 |
| 1-1/2 | 127 | 17.5 | 73.2 | 65 | 48.3 | 62 | 4 | 15.7 | 1/2 | 98.6 |
| 2 | 152.4 | 19.1 | 91.9 | 77.7 | 60.5 | 63.5 | 4 | 19.1 | 5/8 | 120.7 |
| 2-1/2 | 177.8 | 22.4 | 104.6 | 90.4 | 73.2 | 69.9 | 4 | 19.1 | 5/8 | 139.7 |
| 3 | 190.5 | 23.9 | 127 | 108 | 88.9 | 69.9 | 4 | 19.1 | 5/8 | 152.4 |
| 3-1/2 | 215.9 | 23.9 | 139.7 | 122.2 | 101.6 | 71.4 | 8 | 19.1 | 5/8 | 177.8 |
| 4 | 228.6 | 23.9 | 157.2 | 134.9 | 114.3 | 76.2 | 8 | 19.1 | 5/8 | 190.5 |
| 5 | 254 | 23.9 | 185.7 | 163.6 | 141.2 | 88.9 | 8 | 22.4 | 3/4 | 215.9 |
| 6 | 279.4 | 25.4 | 215.9 | 192 | 168.4 | 88.9 | 8 | 22.4 | 3/4 | 241.3 |
| 8 | 342.9 | 28.4 | 269.7 | 246.1 | 219.2 | 101.6 | 8 | 22.4 | 3/4 | 298.5 |
| 10 | 406.4 | 30.2 | 323.9 | 304.8 | 273.1 | 101.6 | 12 | 25.4 | 7/8 | 362 |
| 12 | 482.6 | 31.8 | 381 | 365.3 | 323.9 | 114.3 | 12 | 25.4 | 7/8 | 431.8 |
| 14 | 533.4 | 35.1 | 421.8 | 400.1 | 355.6 | 127 | 12 | 28.4 | 1 | 476.3 |
| 16 | 596.6 | 36.6 | 469.9 | 457.2 | 406.4 | 127 | 16 | 28.4 | 1 | 539.8 |
| 18 | 635 | 39.6 | 533.4 | 505 | 457.2 | 139.7 | 16 | 31.8 | 1-1/8 | 577.9 |
| 20 | 698.5 | 42.9 | 584.2 | 558.8 | 508 | 144.5 | 20 | 31.8 | 1-1/8 | 635 |
| 24 | 812.8 | 47.8 | 692.2 | 663.4 | 609.6 | 152.4 | 20 | 35.1 | 1-1/4 | 749.3 |
- 6 150 Weld Neck Flange Dimensions
The 6 150 weld neck flange dimensions specify a 6-inch nominal size with a pressure rating of 150 pounds. These flanges are commonly used in medium-pressure piping systems, including oil and gas transmission, chemical processing, and water treatment plants.
Their dimensions ensure proper fitment and reliable performance, making them integral components for securely connecting pipes in various industrial applications.
- 6 Inch Weld Neck Flange Dimensions
The 6-inch weld neck flange dimensions specify a nominal size of 6 inches, typically with pressure ratings ranging from 150 to 2500 pounds. Used in high-pressure piping systems, particularly in oil and gas, petrochemical, and power generation industries.
These flanges ensure a secure and leak-proof connection between pipes. Their dimensions adhere to standards like ASME B16.5 to guarantee compatibility and safety.
- 600 Weld Neck Flange Dimensions
The 600 weld neck flange dimensions are tailored to withstand high-pressure environments, adhering to standards like ASME B16.5. These flanges, available in various sizes, ensure a secure connection between pipes in industries like oil, gas, and petrochemicals.
Their robust design and precise dimensions enable them to effectively manage elevated pressures, making them integral components in critical piping systems.
| Nominal Pipe Size |
Outside Diameter of Flange (O) |
Thick nessof Flange (C) |
Diameter of Raised Face (R) |
Diameter of Hub at Base (X) |
Diameter of Hub at End (A) |
Length thru Hub (V) |
No of Holes |
Diameter of Holes (H) |
Diameter of Bolts |
Diameter of Bolt Circle (B) |
| 1/2 | 95.3 | 14.2 | 35.1 | 38.1 | 21.3 | 52.3 | 4 | 15.7 | 1/2 | 66.5 |
| 3/4 | 117.3 | 15.7 | 42.9 | 47.8 | 26.7 | 57.2 | 4 | 19.1 | 5/8 | 82.6 |
| 1 | 124 | 17.5 | 50.8 | 53.8 | 33.5 | 62 | 4 | 19.1 | 5/8 | 88.9 |
| 1-1/4 | 133.4 | 20.6 | 63.5 | 63.5 | 42.2 | 66.5 | 4 | 19.1 | 5/8 | 98.6 |
| 1-1/2 | 155.4 | 22.4 | 73.2 | 69.9 | 48.3 | 69.9 | 4 | 22.4 | 3/4 | 114.3 |
| 2 | 165.1 | 25.4 | 91.9 | 84.1 | 60.5 | 73.2 | 8 | 19.1 | 5/8 | 127 |
| 2-1/2 | 190.5 | 28.4 | 104.6 | 100.1 | 73.2 | 79.2 | 8 | 22.4 | 3/4 | 149.4 |
| 3 | 209.6 | 31.8 | 127 | 117.3 | 88.9 | 82.6 | 8 | 22.4 | 3/4 | 168.1 |
| 3-1/2 | 228.6 | 35.1 | 139.7 | 133.4 | 101.6 | 85.9 | 8 | 25.4 | 7/8 | 184.2 |
| 4 | 273.1 | 38.1 | 157.2 | 152.4 | 114.3 | 101.6 | 8 | 25.4 | 7/8 | 215.9 |
| 5 | 330.2 | 44.5 | 185.7 | 189 | 141.2 | 114.3 | 8 | 28.4 | 1 | 266.7 |
| 6 | 355.6 | 47.8 | 215.9 | 222.3 | 168.4 | 117.3 | 12 | 28.4 | 1 | 292.1 |
| 8 | 419.1 | 55.6 | 269.7 | 273.1 | 219.2 | 133.4 | 12 | 31.8 | 1-1/8 | 349.3 |
| 10 | 508 | 63.5 | 323.9 | 342.9 | 273.1 | 152.4 | 16 | 35.1 | 1-1/4 | 431.8 |
| 12 | 558.8 | 66.5 | 381 | 400.1 | 323.9 | 155.4 | 20 | 35.1 | 1-1/4 | 489 |
| 14 | 603.3 | 69.9 | 412.8 | 431.8 | 355.6 | 165.1 | 20 | 38.1 | 1-3/8 | 527.1 |
| 16 | 685.8 | 76.2 | 469.9 | 495.3 | 406.4 | 177.8 | 20 | 41.1 | 1-1/2 | 603.3 |
| 18 | 743 | 82.6 | 533.4 | 546.1 | 457.2 | 184.2 | 20 | 44.5 | 1-5/8 | 654.1 |
| 20 | 812.8 | 88.9 | 584.2 | 609.6 | 508 | 190.5 | 24 | 44.5 | 1-5/8 | 723.9 |
| 24 | 939.8 | 101.6 | 692.2 | 717.6 | 609.6 | 203.2 | 24 | 50.8 | 1-7/8 | 838.2 |
- 8 150 Weld Neck Flange Dimensions
The 8 150 weld neck flange dimensions refer to a flange designed for 8-inch pipes with a pressure rating of 150 pounds. These flanges are commonly used in piping systems for oil refineries, chemical plants, and other industrial applications requiring secure connections under moderate pressure.
Their dimensions ensure compatibility and proper fitment, providing a reliable fluid handling and containment solution.
- 150 Weld Neck Flange Dimensions
The 150 weld neck flange dimensions are crucial for fitting pipes in low-pressure applications, adhering to standards like ASME B16.5. These flanges are welded to pipes with an outside diameter ranging from 1.38 to 66.0 inches.
This provides secure connections in industries such as water treatment, HVAC, and general plumbing. Their precise dimensions ensure compatibility and reliability in various piping systems.
- 4 Weld Neck Flange Dimensions
The 4 weld neck flange dimensions involve vital specifications for welding onto 4-inch pipes, ensuring a secure connection in various industries. These flanges are commonly used in high-pressure piping systems in oil refineries, chemical plants, and power generation facilities.
Their dimensions adhere to industry standards, providing compatibility and reliability for critical applications requiring leak-proof joints and structural integrity.
Conclusion
Weld neck flanges are essential for piping systems. They offer a robust, leak-proof connection between pipes. They are crucial in various industrial applications because the weld neck flange dimensions are precisely set to guarantee appropriate fitting and performance.