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Dimensions Blind Flanges & Stud Bolts ASME B16.5 |
| OTHER DIA | NPS 12 | |||||
| CLass | 150 | 300 | 600 | 900 | 1500 | 2500 |
| DIA D | 485 | 520 | 560 | 610 | 675 | 760 |
| B | 31.8 | 50.9 | 73.1 | 85.8 | 130.3 | 190.6 |
| DIA G | 381 | 381 | 381 | 381 | 381 | 381 |
| DIA K | 431.8 | 450.8 | 489 | 533.4 | 571.5 | 619.1 |
| NO. L | 12 | 16 | 20 | 20 | 16 | 12 |
| DIA L | 25.4 | 31.8 | 34.9 | 38.1 | 54 | 73 |
| Stud Bolts Diameter x Length | ||||||
| DIA (in) | 7/8 | 1.1/8 | 1.1/4 | 1.3/8 | 2 | 2.3/4 |
| lgth (mm) | 120 | 170 | 220 | 255 | 375 | 540 |
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 Blind 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
not applicable
not applicable
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
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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