ASME B16.5 weld neck flanges, Class 150
Every size in the table, in mm, with a 3D model drawn from the same figures. See weld neck flanges for materials, standards and the marking.
3D model
6" Class 150 weld neck
Key dimensions in mm, ASME B16.5
- O
- Flange diameter
- 280
- Tf
- Flange thickness
- 23.9
- X
- Hub diameter
- 192
- Ah
- Bevel end diameter
- 168.3
- B1
- Bore
- 154.1
- Y
- Length through hub
- 89
- R
- Raised face diameter
- 215.9
- Tr
- Raised face height
- 2
- W
- Bolt circle (PCD)
- 241.3
- d
- Bolt hole diameter
- 22.2
- n
- Number of holes
- 8
- kg
- Weight, approx.
- 11
Dimensions
Units
Swipe the table sideways for every column. Choose a size to show it in the viewer.
| NPSSize | DNNominal size | OFlange diameter | TfFlange thickness | XHub diameter | AhBevel end diameter | B1Bore | YLength through hub | RRaised face diameter | TrRaised face height | WBolt circle (PCD) | dBolt hole diameter | nNumber of holes | kgWeight, approx. | Enquiry list |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 90 | 9.6 | 30 | 21.3 | 15.8 | 48 | 34.9 | 2 | 60.3 | 15.9 | 4 | 0.5 | ||
| 20 | 100 | 11.2 | 38 | 26.7 | 20.9 | 53 | 42.9 | 2 | 69.9 | 15.9 | 4 | 0.7 | ||
| 25 | 110 | 12.7 | 49 | 33.4 | 26.6 | 56 | 50.8 | 2 | 79.4 | 15.9 | 4 | 1.1 | ||
| 32 | 115 | 14.3 | 59 | 42.2 | 35.1 | 58 | 63.5 | 2 | 88.9 | 15.9 | 4 | 1.5 | ||
| 40 | 125 | 15.9 | 65 | 48.3 | 40.9 | 62 | 73 | 2 | 98.4 | 15.9 | 4 | 1.8 | ||
| 50 | 150 | 17.5 | 78 | 60.3 | 52.5 | 64 | 92.1 | 2 | 120.7 | 19 | 4 | 2.7 | ||
| 65 | 180 | 20.7 | 90 | 73 | 62.7 | 70 | 104.8 | 2 | 139.7 | 19 | 4 | 4.4 | ||
| 80 | 190 | 22.3 | 108 | 88.9 | 77.9 | 70 | 127 | 2 | 152.4 | 19 | 4 | 5.2 | ||
| 90 | 215 | 22.3 | 122 | 101.6 | 90.1 | 72 | 139.7 | 2 | 177.8 | 19 | 8 | 6.4 | ||
| 100 | 230 | 22.3 | 135 | 114.3 | 102.3 | 77 | 157.2 | 2 | 190.5 | 19 | 8 | 7.5 | ||
| 125 | 255 | 22.3 | 164 | 141.3 | 128.2 | 89 | 185.7 | 2 | 215.9 | 22.2 | 8 | 9.2 | ||
| 150 | 280 | 23.9 | 192 | 168.3 | 154.1 | 89 | 215.9 | 2 | 241.3 | 22.2 | 8 | 11 | In the viewer | |
| 200 | 345 | 27 | 246 | 219.1 | 202.7 | 102 | 269.9 | 2 | 298.5 | 22.2 | 8 | 18.3 | ||
| 250 | 405 | 28.6 | 305 | 273 | 254.6 | 102 | 323.8 | 2 | 362 | 25.4 | 12 | 25 | ||
| 300 | 485 | 30.2 | 365 | 323.8 | 304.8 | 115 | 381 | 2 | 431.8 | 25.4 | 12 | 39 | ||
| 350 | 535 | 33.4 | 400 | 355.6 | 336.5 | 127 | 412.8 | 2 | 476.3 | 28.6 | 12 | 51 | ||
| 400 | 595 | 35 | 457 | 406.4 | 387.3 | 127 | 469.9 | 2 | 539.8 | 28.6 | 16 | 60 | ||
| 450 | 635 | 38.1 | 505 | 457 | 438.1 | 140 | 533.4 | 2 | 577.9 | 31.7 | 16 | 71 | ||
| 500 | 700 | 41.3 | 559 | 508 | 488.9 | 145 | 584.2 | 2 | 635 | 31.7 | 20 | 88 | ||
| 600 | 815 | 46.1 | 663 | 610 | 590.5 | 153 | 692.2 | 2 | 749.3 | 34.9 | 20 | 119 |
Dimensions in mm, for reference. Tolerances and full requirements as per the applicable standard. Confirm against your specification before ordering.
Source: Shiv Shakti Machine Tools Flange Catalogue, edition 2026 (draft), page 9, weights page 15. “–” means the catalogue lists no value.
[CONFIRM: table checked and signed off by the owners (unverified)][CONFIRM: whether the flange thickness includes the raised face]