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Dimensions Lap Joint Flanges & Stud Bolts ASME B16.5 |
| OTHER DIA | NPS 8 ID=222.2 r=13 | |||||
| CLass | 150 | 300 | 600 | 900 | 1500 | 2500 |
| DIA A | 246 | 260 | 272 | 298 | 290 | 305 |
| DIA D | 345 | 380 | 420 | 470 | 485 | 550 |
| THK B | 28.6 | 41.3 | 55.6 | 63.5 | 92.1 | 127 |
| DIA K | 298.5 | 330.2 | 349.2 | 393.7 | 393.7 | 438.2 |
| H | 44 | 62 | 76 | 114 | 143 | 178 |
| NO. L | 8 | 12 | 12 | 12 | 12 | 12 |
| DIA L | 22.2 | 25.4 | 31.8 | 38.1 | 44.5 | 54 |
| Stud Bolts Diameter x Length | ||||||
| DIA (in) | 3/4 | 7/8 | 1.1/8 | 1.3/8 | 1.5/8 | 2 |
| lgth (mm) | 110 | 140 | 190 | 220 | 290 | 380 |
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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