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Flanges Information
Welding Neck Flanges
| Welding Neck Flanges |
|---|
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
|---|---|---|---|---|---|---|---|
| Diameter - A | 30 | 38 | 38 | 38 | 38 | 38 | 43 |
| Diameter - D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Thickness - B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter - G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter - K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Height - H | 46 | 51 | 52 | 52 | 60 | 60 | 73 |
| 47.6 | 52.6 | 58.4 | 58.4 | 66.4 | 66.4 | 79.4 | |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter - L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
Dimensional Tolerances Of Welding Neck Flanges ASME B16.5
| Outside Diameter (mm) ≤ 24 = 1.6 | > 24 = ± 3.2 |
Inside Diameter (mm) ≤ 10 = ± 0.8 | 12 thru 18 = 1.6 | ≥ 20 = + 3.2 / - 1.6 |
| Diameter of Contact Face 1.6 Raised Face = ± 0.8 6.35 Raised Face, Tongue & Groove / Male-Female = ± 0.4 |
Diameter of Hub at Base ≤ 24 = 1.6 | > 24 = ± 3.2 |
| Diameter of Hub at Point of Welding ≤ 5 = + 2.4 / - 0.8 | ≥ 6 = + 4.0 / - 0.8 |
Drilling Bolt Circle = 1.6 | Bolt Hole Spacing = ± 0.8 Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 max. | ≥ 3 = 1.6 max |
| Thickness ≤ 18 = + 3.2 / - 0 | ≥ 20 = + 4.8 / - 0 |
Length thru Hub ≤ 10 = 1.6 | ≥ 12 = ± 3.2 |
Notes:
1. Dimensions are in millimeters unless otherwise indicated.
2. T = Nominal wall thickness of pipe. Bevel for Wall Thicknesses T from 5 mm to 22 mm inclusive.
3. The length of the stud bolt does not include the height of the chamfers (points).
Slip On Flanges
| Slip On Flanges |
|---|
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
|---|---|---|---|---|---|---|---|
| Diameter - A | 30 | 38 | 38 | 38 | 38 | 38 | ... |
| Diameter - D | 90 | 95 | 95 | 95 | 120 | 120 | ... |
| Thickness - B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | ... |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | ... | |
| Diameter - G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | ... |
| Diameter - K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | ... |
| Height - H | 14 | 21 | 22 | 22 | 32 | 32 | ... |
| 15.6 | 22.6 | 28.4 | 28.4 | 38.4 | 38.4 | ... | |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | ... |
| Diameter - L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | ... |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | ... |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | ... |
Dimensional Tolerances Of Slip On Flanges ASME B16.5
| Outside Diameter (mm) ≤ 24 = 1.6 | > 24 = ± 3.2 |
Inside Diameter (mm) ≤ 10 = ± 0.8 | ≥ 12 = + 1.6 / - 0 |
| Diameter of Contact Face 1.6 Raised Face = ± 0.8 6.35 Raised Face, Tongue & Groove / Male-Female = ± 0.4 |
Outside Diameter of Hub ≤ 12 = + 2.4 / - 1.6 | ≥ 14 = ± 3.2 |
| Diameter of Counterbore Same as for Inside Diameter |
Drilling Bolt Circle = 1.6 | Bolt Hole Spacing = ± 0.8 Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 max. | ≥ 3 = 1.6 max. |
| Thickness ≤ 18 = + 3.2 / - 0 | ≥ 20 = + 4.8 / - 0 |
Length thru Hub ≤ 18 = + 3.2 / - 0.8 | ≥ 20 = + 4.8 / - 1.6 |
Notes:
1. Dimensions are in millimeters unless otherwise indicated.
2. The length of the stud bolt does not include the height of the chamfers (points).
Socket Weld Flanges
| Socket Weld Flanges |
|---|
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
|---|---|---|---|---|---|---|---|
| Diameter - A | 30 | 38 | ... | 38 | ... | 38 | ... |
| Diameter - D | 90 | 95 | ... | 95 | ... | 120 | ... |
| Thickness - B | 9.6 | 12.7 | ... | 14.3 | ... | 22.3 | ... |
| 11.2 | 14.3 | ... | 20.7 | ... | 28.7 | ... | |
| Diameter - G | 35.1 | 35.1 | ... | 35.1 | ... | 35.1 | ... |
| Diameter - K | 60.3 | 66.7 | ... | 66.7 | ... | 82.6 | ... |
| Height - H | 14 | 21 | ... | 22 | ... | 32 | ... |
| 15.6 | 22.6 | ... | 28.4 | ... | 38.4 | ... | |
| Bolt Holes | 4 | 4 | ... | 4 | ... | 4 | ... |
| Diameter - L | 15.9 | 15.9 | ... | 15.9 | ... | 22.2 | ... |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | ... | 1/2 | ... | 3/4 | ... |
| Length (mm) | 55 | 65 | ... | 75 | ... | 110 | ... |
Dimensional Tolerances Of Socket Weld Flanges ASME B16.5
| Outside Diameter (mm) ≤ 24 = 1.6 | > 24 = ± 3.2 |
Inside Diameter (mm) ≤ 10 = ± 0.8 | ≥ 12 = + 1.6 / - 0 |
| Diameter of Contact Face 1.6 Raised Face = ± 0.8 6.35 Raised Face, Tongue & Groove / Male-Female = ± 0.4 |
Outside Diameter of Hub ≤ 12 = + 2.4 / - 1.6 | ≥ 14 = ± 3.2 |
| Diameter of Counterbore Same as for Inside Diameter |
Drilling Bolt Circle = 1.6 | Bolt Hole Spacing = ± 0.8 Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 max. | ≥ 3 = 1.6 max. |
| Thickness ≤ 18 = + 3.2 / - 0 | ≥ 20 = + 4.8 / - 0 |
Length thru Hub ≤ 18 = + 3.2 / - 0.8 | ≥ 20 = + 4.8 / - 1.6 |
Notes:
1. Dimensions are in millimeters unless otherwise indicated.
2. The length of the stud bolt does not include the height of the chamfers (points).
Lap Joint Flanges
| Lap Joint Flanges |
|---|
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
|---|---|---|---|---|---|---|---|
| Diameter - A | 30 | 38 | 38 | 38 | 38 | 38 | 43 |
| Diameter - D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Thickness - B | 11.2 | 14.3 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| Diameter - G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter - K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Height - H | 16 | 22 | 22 | 22 | 32 | 32 | 40 |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter - L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
Dimensional Tolerances Of Lap Joint Flanges ASME B16.5
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter ≤ 10 = ± 0.8 mm | ≥ 12 = + 1.6 mm / - 0 mm |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Outside Diameter of Hub ≤ 12 = + 2.4 mm / - 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore Same as for Inside Diameter |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / - 0 | ≥ 20 = + 4.8 mm / - 0 |
Length thru Hub ≤ 18 = + 3.2 mm / - 0.8 mm | ≥ 20 = + 4.8 mm / - 1.6 mm |
Notes:
1. Dimensions are in millimeters unless otherwise indicated.
2. The length of the stud bolt does not include the height of the chamfers (points).
Threaded Flanges
| Threaded Flanges |
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
| Diameter - A | 30 | 38 | 38 | 38 | 38 | 38 | 43 |
| Diameter - D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Thickness - B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter - G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter - K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Height - H | 14 | 21 | 22 | 22 | 32 | 32 | 40 |
| 15.6 | 22.6 | 28.4 | 28.4 | 38.4 | 38.4 | 46.4 | |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter - L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
Dimensional Tolerances Of Threaded Flanges ASME B16.5
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter Within Limits on Boring Gauge |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Outside Diameter of Hub ≤ 12 = + 2.4 mm / - 1.6 mm | ≥ 14 = ± 3.2 mm |
Diameter of Counterbore Same as forInside Diameter |
| Thickness ≤ 18 = + 3.2 mm / - 0 | ≥ 20 = + 4.8 mm / - 0 |
Length thru Hub ≤ 18 = + 3.2 mm / - 0.8 mm | ≥ 20 = + 4.8 mm / - 1.6 mm |
Notes:
1. Dimensions are in millimeters unless otherwise indicated.
2. The length of the stud bolt does not include the height of the chamfers (points).
Blind Flanges
| Blind Flanges |
| Class | 150 | 300 | 400 | 600 | 900 | 1500 | 2500 |
| Diameter - D | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Height - B | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 20.7 | 28.7 | 28.7 | 36.6 | |
| Diameter - G | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter - K | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Diameter - L | 15.9 | 15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | |||||||
| Diameter (in) | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Length (mm) | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
Dimensional Tolerances Of Blind Flanges ASME B16.5
| Outside Diameter ≤ 24 = 1.6 mm | > 24 = ± 3.2 mm |
Inside Diameter not applicable |
| Diameter of Contact Face 1.6 mm Raised Face = ± 0.8 mm 6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm |
Outside Diameter of Hub ≤ 12 = + 2.4 mm / - 1.6 mm | ≥ 14 = ± 3.2 mm |
| Diameter of Counterbore not applicable |
Drilling Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm Eccentricity of Bolt Circle with Respect to Facing ≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max. |
| Thickness ≤ 18 = + 3.2 mm / - 0 | ≥ 20 = + 4.8 mm / - 0 |
Length thru Hub ≤ 18 = + 3.2 mm / - 0.8 mm | ≥ 20 = + 4.8 mm / - 1.6 mm |
Notes:
1. Dimensions are in millimeters unless otherwise indicated.
2. The length of the stud bolt does not include the height of the chamfers (points).