Dimensions Weld Neck Flanges & Stud Bolts ASME B16.5
OTHER DIAMETERS
NPS 8 - O.D. 219.0
| 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 |
27 | 39.7 | 55.6 | 63.5 | 92.1 | 127 |
| 28.6 | 41.3 | 62 | 69.9 | 98.5 | 133.4 | |
| DIA G |
269.7 | 269.7 | 269.7 | 269.7 | 269.7 | 269.7 |
| DIA K |
298.5 | 330.2 | 349.2 | 393.7 | 395 | 438.1 |
| H | 100 | 110 | 133 | 162 | 213 | 318 |
| 101.6 | 111.6 | 139.4 | 168.4 | 219.4 | 324.4 | |
| 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 |
| Lenght (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).
- ID = Depending on the wall thickness of the pipe, must be specified by the purchaser.
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
Piping related Abbreviations
