We are Leading Dimensions Weld Neck Flanges & Stud Bolts ASME B16.5
OTHER DIA
| 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 | 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 | 47.6 | 52.6 | 58.4 | 66.4 | 66.4 | 79.4 |
| 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 |
| lgth (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).
- 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.
- ID = Depending on the wall thickness of the pipe, must be specified by the purchaser.
- Important! please read this short article
Dimensional Tolerances of Weld Neck Flanges ASME B16.5
Outside Diameter *
Tolerances not listed in ASME B16.5 2013
≤ 24 → 1.6 mm (0.06 in)
> 24 → ±3.2 mm (±0.12 in)
Tolerances not listed in ASME B16.5 2013
≤ 24 → 1.6 mm (0.06 in)
> 24 → ±3.2 mm (±0.12 in)
Diameter Hub at Base
≤ 24 → 1.6 mm (0.06 in)
> 24 → ±3.2 mm (±0.12 in)
≤ 24 → 1.6 mm (0.06 in)
> 24 → ±3.2 mm (±0.12 in)
Inside Diameter
≤ 10 → ±0.8 mm (±0.03 in)
12 thru 18 → 1.6 mm (0.06 in)
≥ 20 → +3.2 mm / -1.6 mm (±0.12 in / -0.06 in)
≤ 10 → ±0.8 mm (±0.03 in)
12 thru 18 → 1.6 mm (0.06 in)
≥ 20 → +3.2 mm / -1.6 mm (±0.12 in / -0.06 in)
Diameter Hub at Point of Welding
≤ 5 → +2.4 mm / -0.8 mm (±0.09 in / -0.03 in)
≥ 6 → +4.0 mm / -0.8 mm (+0.15 in / -0.03 in)
≤ 5 → +2.4 mm / -0.8 mm (±0.09 in / -0.03 in)
≥ 6 → +4.0 mm / -0.8 mm (+0.15 in / -0.03 in)
Drilling
Bolt Circle → 1.6 mm (0.06 in)
Bolt Hole Spacing → ±0.8 mm (±0.03 in)
Bolt Circle → 1.6 mm (0.06 in)
Bolt Hole Spacing → ±0.8 mm (±0.03 in)
Eccentricity Bolt Circle
≤ 2.1/2 → 0.8 mm max (0.03 in max)
≥ 3 → 1.6 mm max (0.06 in max)
≤ 2.1/2 → 0.8 mm max (0.03 in max)
≥ 3 → 1.6 mm max (0.06 in max)
Thickness
≤ 18 → +3.2 mm / -0 (±0.12 in / -0)
≥ 20 → +4.8 mm / -0 (+0.18 in / -0)
≤ 18 → +3.2 mm / -0 (±0.12 in / -0)
≥ 20 → +4.8 mm / -0 (+0.18 in / -0)
Length thru Hub
≤ 10 → 1.6 mm (0.06 in)
≥ 12 → ±3.2 mm (±0.12 in)
≤ 10 → 1.6 mm (0.06 in)
≥ 12 → ±3.2 mm (±0.12 in)
Diameter Contact Face
1.6 mm RF (0.06 in) → ±0.8 mm (±0.03 in)
6.35 mm RF (0.25 in) → ±0.4 mm (±0.01 in)
Tongue & Groove → ±0.4 mm (±0.01 in)
Male-Female → ±0.4 mm (±0.01 in)
1.6 mm RF (0.06 in) → ±0.8 mm (±0.03 in)
6.35 mm RF (0.25 in) → ±0.4 mm (±0.01 in)
Tongue & Groove → ±0.4 mm (±0.01 in)
Male-Female → ±0.4 mm (±0.01 in)
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
