Dimensions Threaded Flanges & Stud Bolts ASME B16.5
OTHER DIAMETERS
NPS 1/2
| CLass | 150 | 300 | 600 | 900 | 1500 | 2500 |
| DIA A |
30 | 38 | 38 | 38 | 38 | 43 |
| DIA D |
90 | 95 | 95 | 120 | 120 | 135 |
| THK B |
9.6 | 12.7 | 14.3 | 22.3 | 22.3 | 30.2 |
| 11.2 | 14.3 | 20.7 | 28.7 | 28.7 | 36.6 | |
| DIA G |
35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| DIA K |
60.3 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| H | 14 | 21 | 22 | 32 | 32 | 40 |
| 15.6 | 22.6 | 28.4 | 38.4 | 38.4 | 46.4 | |
| NO. L |
4 | 4 | 4 | 4 | 4 | 4 |
| DIA L |
15.9 | 15.9 | 15.9 | 22.2 | 22.2 | 22.2 |
| Stud Bolts Diameter x Length | ||||||
| DIA (in) |
1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| Lenght (mm) |
55 | 65 | 75 | 110 | 110 | 120 |
Notes..
- Dimensions are in millimeters unless otherwise indicated.
- The length of the Stud Bolt does not include the height of the chamfers (points).
Dimensional Tolerances of Threaded Flanges ASME B16.5
Outside Diameter *
Tolerances not listed in ASME B16.5 2013
≤ 24 = 1.6 mm
> 24 = ± 3.2 mm
Tolerances not listed in ASME B16.5 2013
≤ 24 = 1.6 mm
> 24 = ± 3.2 mm
Inside Diameter
Within Limits on Boring Gauge
Within Limits on Boring Gauge
Drilling
Bolt Circle = 1.6 mm
Bolt Hole Spacing = ± 0.8 mm
Bolt Circle = 1.6 mm
Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle
≤ 2.1/2 = 0.8 mm max.
≥ 3 = 1.6 mm max.
≤ 2.1/2 = 0.8 mm max.
≥ 3 = 1.6 mm max.
Outside Diameter of Hub
≤ 12 = + 2.4 mm / - 1.6 mm
≥ 14 = ± 3.2 mm
≤ 12 = + 2.4 mm / - 1.6 mm
≥ 14 = ± 3.2 mm
Diameter of Counterbore
Same as forInside Diameter
Same as forInside Diameter
Thickness
≤ 18 = + 3.2 mm / - 0
≥ 20 = + 4.8 mm / - 0
≤ 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
≤ 18 = + 3.2 mm / - 0.8 mm
≥ 20 = + 4.8 mm / - 1.6 mm
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face
Tongue and Groove / Male-Female
± 0.4 mm
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face
Tongue and Groove / Male-Female
± 0.4 mm
Studs are measured parallel to the axis (L) from the first to the thread without the chamfers (points). S = free threads equals 1/3 time bolt dia
Hex bolts are measured from under the head to the top of de bolt
Piping related Abbr.
Question & Answer
