Dimensions Weld Neck Flanges & Stud Bolts ASME B16.5
| OTHER DIA | NPS 3 - O.D. 88.9 | |||||
| CLass | 150 | 300 | 600 | 900 | 1500 | 2500 |
| DIA A | 108 | 115 | 115 | 127 | 125 | 125 |
| DIA D | 190 | 210 | 210 | 240 | 265 | 305 |
| THK B | 23.9 | 28.6 | 38.2 | 44.5 | 54.1 | 73.1 |
| DIA G | 127 | 127 | 127 | 127 | 127 | 127 |
| DIA K | 152.4 | 168.3 | 168.3 | 190.5 | 205 | 230 |
| H | 69.6 | 79.6 | 89.4 | 108.4 | 123.4 | 174.4 |
| NO. L | 4 | 8 | 8 | 8 | 8 | 8 |
| DIA L | 19.1 | 22.2 | 22.2 | 25.4 | 31.8 | 34.9 |
| Stud Bolts Diameter x Length | ||||||
| DIA (in) | 5/8 | 3/4 | 3/4 | 7/8 | 1.1/8 | 1.1/4 |
| lgth (mm) | 90 | 110 | 125 | 145 | 180 | 220 |
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 and 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 and 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 top of de bolt
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