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Dimensions Lap Joint Flanges & Stud Bolts ASME B16.5 |
| OTHER DIA | NPS 3.1/2 ID=104.1 r=10 | |||||
| CLass | 150 | 300 | 600 | 900 | 1500 | 2500 |
| DIA A | 122 | 135 | 133 | ... | ... | ... |
| DIA D | 215 | 230 | 230 | ... | ... | ... |
| THK B | 23.9 | 30.2 | 35 | ... | ... | ... |
| DIA K | 177.8 | 184.2 | 184.2 | ... | ... | ... |
| H | 32 | 44 | 49 | ... | ... | ... |
| NO. L | 8 | 8 | 8 | ... | ... | ... |
| DIA L | 19.1 | 22.2 | 25.4 | ... | ... | ... |
| Stud Bolts Diameter x Length | ||||||
| DIA (in) | 5/8 | 3/4 | 7/8 | ... | ... | ... |
| lgth (mm) | 90 | 110 | 140 | ... | ... | ... |
Notes..
- Dimensions are in millimeters unless otherwise indicated.
- The length of the Stud Bolt does not include the height of the chamfers (points).
- The length of the Stud Bolts includes one Spiral Wound Gasket with a 4.5mm thick sealing element, which is compressed to 3mm while tightening the Raised Face flange connection.
- Important! please read this short article
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 end of the bolt
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The ASME B16.5 code requires that the flange face has a specific roughness to ensure that this surface be compatible with the gasket...
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