Dimensions Lap Joint Flanges & Stud Bolts ASME B16.5
OTHER DIAMETERS
NPS 1/2 - ID = 22.9 - r = 3
| 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 |
11.2 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| DIA K |
60.3 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| H | 16 | 22 | 22 | 32 | 32 | 40 |
| 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 Lap Joint 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
≤ 10 = ± 0.8 mm
≥ 12 = + 1.6 mm / - 0 mm
≤ 10 = ± 0.8 mm
≥ 12 = + 1.6 mm / - 0 mm
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 for Inside Diameter
Same as for Inside Diameter
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.
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 Abbreviations
