ANSI / ASME B16.5 Class 900 Weld Neck Flange Dimensions
B16.5 900# Weld Neck Flange is a type of weld neck flange that conforms to the ASME B16.5 standard
ANSI / ASME B16.5 Class 900 Weld Neck Flange
Class 900 Weld Neck Flange Dimensions in Inch/lbs
Class 900 Weld Neck Flange Dimensions in mm/kg
Class 900 Weld Neck Flange Dimensions in Inch/lbs
| Nominal Pipe Size | Outside Diameter (Q) | Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Hub Diameter (X) | Bore (B) | Approximate Weight (lbs) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 4.75 | 0.88 | 1.38 | 2.38 | 1.50 | Specified by purchaser | 5 | 3.25 | 4 | 0.88 |
| 3/4 | 5.13 | 1.00 | 1.69 | 2.75 | 1.75 | 6 | 3.50 | 4 | 0.88 | |
| 1 | 5.88 | 1.13 | 2.00 | 2.88 | 2.06 | 9 | 4.00 | 4 | 1.00 | |
| 1 1/4 | 6.25 | 1.13 | 2.50 | 2.88 | 2.50 | 10 | 4.38 | 4 | 1.00 | |
| 1 1/2 | 7.00 | 1.25 | 2.88 | 3.25 | 2.75 | 13 | 4.88 | 4 | 1.13 | |
| 2 | 8.50 | 1.50 | 3.63 | 4.00 | 4.13 | 25 | 6.50 | 8 | 1.00 | |
| 2 1/2 | 9.63 | 1.63 | 4.13 | 4.06 | 4.88 | 36 | 7.50 | 8 | 1.13 | |
| 3 | 9.50 | 1.50 | 5.00 | 4.00 | 5.00 | 31 | 7.50 | 8 | 1.00 | |
| 4 | 11.50 | 1.75 | 6.19 | 4.50 | 6.25 | 53 | 9.25 | 8 | 1.25 | |
| 5 | 13.75 | 2.00 | 7.31 | 5.00 | 7.50 | 86 | 11.00 | 8 | 1.38 | |
| 6 | 15.00 | 2.19 | 8.50 | 5.50 | 9.25 | 110 | 12.50 | 12 | 1.25 | |
| 8 | 18.50 | 2.50 | 10.63 | 6.38 | 11.75 | 175 | 15.50 | 12 | 1.50 | |
| 10 | 21.50 | 2.75 | 12.75 | 7.25 | 14.50 | 260 | 18.50 | 16 | 1.50 | |
| 12 | 24.00 | 3.13 | 15.00 | 7.88 | 16.50 | 325 | 21.00 | 20 | 1.50 | |
| 14 | 25.25 | 3.38 | 16.25 | 8.38 | 17.75 | 400 | 22.00 | 20 | 1.63 | |
| 16 | 27.75 | 3.50 | 18.50 | 8.50 | 20.00 | 495 | 24.25 | 20 | 1.75 | |
| 18 | 31.00 | 4.00 | 21.00 | 9.00 | 22.25 | 680 | 27.00 | 20 | 2.00 | |
| 20 | 33.75 | 4.25 | 23.00 | 9.75 | 24.50 | 830 | 29.50 | 20 | 2.13 | |
| 24 | 41.00 | 5.50 | 27.25 | 11.50 | 29.50 | 1500 | 35.50 | 20 | 2.63 |
Class 900 Weld Neck Flange Dimensions in mm/kg
| Nominal Pipe Size | Outside Diameter (Q) | Thickness (T) | Raised Face Diameter (R) | Length Thru Hub (Y) | Hub Diameter (X) | Bore (B) | Approximate Weight (kg) | Bolt Circle (C) | Number of Holes | Diameter of Holes |
| 1/2 | 120.7 | 22.4 | 35.1 | 60.5 | 38.1 | Specified by purchaser | 2.3 | 82.6 | 4 | 22.4 |
| 3/4 | 130.3 | 25.4 | 42.9 | 69.9 | 44.5 | 2.7 | 88.9 | 4 | 22.4 | |
| 1 | 149.4 | 28.7 | 50.8 | 73.2 | 52.3 | 4.1 | 101.6 | 4 | 25.4 | |
| 1 1/4 | 158.8 | 28.7 | 63.5 | 73.2 | 63.5 | 4.5 | 111.3 | 4 | 25.4 | |
| 1 1/2 | 177.8 | 31.8 | 73.2 | 82.6 | 69.9 | 5.9 | 124.0 | 4 | 28.7 | |
| 2 | 215.9 | 38.1 | 92.2 | 101.6 | 104.9 | 11.3 | 165.1 | 8 | 25.4 | |
| 2 1/2 | 244.6 | 41.4 | 104.9 | 103.1 | 124.0 | 16.3 | 190.5 | 8 | 28.7 | |
| 3 | 241.3 | 38.1 | 127.0 | 101.6 | 127.0 | 14.1 | 190.5 | 8 | 25.4 | |
| 4 | 292.1 | 44.5 | 157.2 | 114.3 | 158.8 | 24.0 | 235.0 | 8 | 31.8 | |
| 5 | 349.3 | 50.8 | 185.7 | 127.0 | 190.5 | 39.0 | 279.4 | 8 | 35.1 | |
| 6 | 381.0 | 55.6 | 215.9 | 139.7 | 235.0 | 49.9 | 317.5 | 12 | 31.8 | |
| 8 | 469.9 | 63.5 | 270.0 | 162.1 | 298.5 | 79.4 | 393.7 | 12 | 38.1 | |
| 10 | 546.1 | 69.9 | 323.9 | 184.2 | 368.3 | 117.9 | 469.9 | 16 | 38.1 | |
| 12 | 609.6 | 79.5 | 381.0 | 200.2 | 419.1 | 147.4 | 533.4 | 20 | 38.1 | |
| 14 | 641.4 | 85.9 | 412.8 | 212.9 | 450.9 | 181.4 | 558.8 | 20 | 41.4 | |
| 16 | 704.9 | 88.9 | 469.9 | 215.9 | 508.0 | 224.5 | 616.0 | 20 | 44.5 | |
| 18 | 787.4 | 101.6 | 533.4 | 228.6 | 565.2 | 308.4 | 685.8 | 20 | 50.8 | |
| 20 | 857.3 | 108.0 | 584.2 | 247.7 | 622.3 | 376.5 | 749.3 | 20 | 54.1 | |
| 24 | 1041.4 | 139.7 | 692.2 | 292.1 | 749.3 | 680.4 | 901.7 | 20 | 66.8 |
The ASME B16.5 900# Weld Neck Flange is a type of flange that complies with the ASME B16.5 standard and is suitable for Class 900 pressure ratings. This flange is designed for extremely high-pressure and high-temperature environments, commonly used in critical applications in the oil and gas, chemical, and power industries.
Features of ASME B16.5 900# Weld Neck Flange
- Standard: ASME B16.5
- Pressure Rating: Class 900 (maximum working pressure of 900 psi at ambient temperature).
- Type: Weld Neck Flange.
- Material: Carbon steel (e.g., ASTM A105), stainless steel (e.g., ASTM A182), alloy steel (e.g., ASTM A182 F11), etc.
- Facing Types: Raised face (RF), flat face (FF), ring-type joint (RTJ), etc.
- Size Range: Typically from 1/2″ to 24″.
Applications of ASME B16.5 900# Weld Neck Flange
- Oil and Gas: Used for extremely high-pressure pipeline and equipment connections.
- Chemical Industry: Suitable for extremely high-pressure transportation systems of corrosive media.
- Power Industry: Used for extremely high-pressure steam and cooling water pipelines.
- Shipbuilding and Marine Engineering: Used for extremely high-pressure seawater and fuel systems.
- General Industry: Suitable for various extremely high-pressure fluid transportation systems.
The ASME B16.5 900# Weld Neck Flange is a standard flange suitable for extremely high-pressure and high-temperature environments, widely used in critical applications in the oil and gas, chemical, and power industries. Proper selection, installation, and maintenance are key to ensuring its long-term and stable operation.
For more technical support, please contact SSM.
FAQ
- The main differences are in pressure rating and wall thickness:
- Class 900 flanges are suitable for extremely high-pressure environments and have thicker walls.
- Class 600 flanges are suitable for high-pressure environments and have thinner walls.
- Maintenance recommendations:
- Regularly check the tightness of the flange and bolts.
- Inspect the sealing surface for damage or corrosion.
- Replace gaskets and bolts periodically in corrosive environments.
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