ANSI / ASME B16.5 Class 300 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 300 Threaded Flange
| 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 | 3 | 3.50 | 4 | 0.75 |
| 1 1/4 | 5.25 | 0.75 | 2.50 | 1.06 | 2.50 | 4 | 3.88 | 4 | 0.75 |
| 1 1/2 | 6.13 | 0.81 | 2.88 | 1.19 | 2.75 | 6 | 4.50 | 4 | 0.88 |
| 2 | 6.50 | 0.88 | 3.63 | 1.31 | 3.31 | 7 | 5.00 | 8 | 0.75 |
| 2 1/2 | 7.50 | 1.00 | 4.13 | 1.50 | 3.94 | 10 | 5.88 | 8 | 0.88 |
| 3 | 8.25 | 1.13 | 5.00 | 1.69 | 4.63 | 13 | 6.63 | 8 | 0.88 |
| 3 1/2 | 9.00 | 1.19 | 5.50 | 1.75 | 5.25 | 17 | 7.25 | 8 | 0.88 |
| 4 | 10.00 | 1.25 | 6.19 | 1.88 | 5.75 | 22 | 7.88 | 8 | 0.88 |
| 5 | 11.00 | 1.38 | 7.31 | 2.00 | 7.00 | 28 | 9.25 | 8 | 0.88 |
| 6 | 12.50 | 1.44 | 8.50 | 2.06 | 8.13 | 39 | 10.63 | 12 | 0.88 |
| 8 | 15.00 | 1.63 | 10.63 | 2.44 | 10.25 | 58 | 13.00 | 12 | 1.00 |
| 10 | 17.50 | 1.88 | 12.75 | 2.62 | 12.63 | 81 | 15.25 | 16 | 1.13 |
| 12 | 20.50 | 2.00 | 15.00 | 2.88 | 14.75 | 115 | 17.75 | 16 | 1.25 |
| 14 | 23.00 | 2.13 | 16.25 | 3.00 | 16.75 | 165 | 20.25 | 20 | 1.25 |
| 16 | 25.50 | 2.25 | 18.50 | 3.25 | 19.00 | 190 | 22.50 | 20 | 1.38 |
| 18 | 28.00 | 2.38 | 21.00 | 3.50 | 21.00 | 250 | 24.75 | 24 | 1.38 |
| 20 | 30.50 | 2.50 | 23.00 | 3.75 | 23.13 | 315 | 27.00 | 24 | 1.38 |
| 22 | 33.00 | 2.63 | 25.25 | 4.00 | 25.25 | 370 | 29.25 | 24 | 1.63 |
| 24 | 36.00 | 2.75 | 27.25 | 4.19 | 27.63 | 475 | 32.00 | 24 | 1.63 |
| 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 | 1.36 | 88.90 | 4 | 19.05 |
| 1 1/4 | 133.35 | 19.05 | 63.50 | 26.92 | 63.50 | 1.81 | 98.55 | 4 | 19.05 |
| 1 1/2 | 155.70 | 20.57 | 73.15 | 30.23 | 69.85 | 2.72 | 114.30 | 4 | 22.35 |
| 2 | 165.10 | 22.35 | 92.20 | 33.27 | 84.07 | 3.18 | 127.00 | 8 | 19.05 |
| 2 1/2 | 190.50 | 25.40 | 104.90 | 38.10 | 100.08 | 4.54 | 149.35 | 8 | 22.35 |
| 3 | 209.55 | 28.70 | 127.00 | 42.93 | 117.60 | 5.90 | 168.40 | 8 | 22.35 |
| 3 1/2 | 228.60 | 30.23 | 139.70 | 44.45 | 133.35 | 7.71 | 184.15 | 8 | 22.35 |
| 4 | 254.00 | 31.75 | 157.23 | 47.75 | 146.05 | 9.98 | 200.15 | 8 | 22.35 |
| 5 | 279.40 | 35.05 | 185.67 | 50.80 | 177.80 | 12.70 | 234.95 | 8 | 22.35 |
| 6 | 317.50 | 36.58 | 215.90 | 52.32 | 206.50 | 17.69 | 270.00 | 12 | 22.35 |
| 8 | 381.00 | 41.40 | 270.00 | 61.98 | 260.35 | 26.31 | 330.20 | 12 | 25.40 |
| 10 | 444.50 | 47.75 | 323.85 | 66.55 | 320.80 | 36.74 | 387.35 | 16 | 28.70 |
| 12 | 520.70 | 50.80 | 381.00 | 73.15 | 374.65 | 52.16 | 450.85 | 16 | 31.75 |
| 14 | 584.20 | 54.10 | 412.75 | 76.20 | 425.45 | 74.84 | 514.35 | 20 | 31.75 |
| 16 | 647.70 | 57.15 | 469.90 | 82.55 | 482.60 | 86.18 | 571.50 | 20 | 35.05 |
| 18 | 711.20 | 60.45 | 533.40 | 88.90 | 533.40 | 113.40 | 628.65 | 24 | 35.05 |
| 20 | 774.70 | 63.50 | 584.20 | 95.25 | 587.50 | 142.88 | 685.80 | 24 | 35.05 |
| 22 | 838.20 | 66.80 | 641.35 | 101.60 | 641.35 | 167.83 | 742.95 | 24 | 41.40 |
| 24 | 914.40 | 69.85 | 692.15 | 106.43 | 701.80 | 215.46 | 812.80 | 24 | 41.40 |
ANSI / ASME B16.5 Class 300 Threaded Flange is a flange that conforms to the ANSI / ASME B16.5 standard with a pressure rating of Class 300. It is typically used for pipe connections where welding is not required. The inner hole of the flange is threaded, allowing it to be directly screwed onto pipes or equipment, eliminating the need for welding. Class 300 indicates that the flange is rated for a maximum working pressure of 300 pounds per square inch (psi) at standard temperatures.
This type of flange is especially suitable for applications where welding is not feasible or where quick installation is required, such as in high-pressure or easy-to-disassemble piping systems. It is commonly used in small-diameter pipes or applications where materials like stainless steel or aluminum are needed, as it allows for simple installation and efficient operation.
For more technical support, please contact SSM.
FAQ
A Threaded Flange is a type of flange that connects to a pipe using internal threads that match the external threads of the pipe. It does not require welding, making it ideal for systems where welding is not feasible or desirable.
- A threaded flange is installed by simply screwing it onto the corresponding threaded pipe or equipment. It does not require welding or complex procedures, making it faster and easier to install.
No, Threaded Flanges are typically used in low to medium-pressure systems. For high-pressure systems, welded flanges such as Weld Neck or Slip-on flanges are recommended.
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