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Dimensions Stud Bolts for RF flanges ASME B16.47 Series B Class 150-900 |
Series B
| Class 150 | |||
| NPS | No of Bolts |
Stud Bolt Dia x L |
|
| 26 | 36 | 3/4 | 140 |
| 28 | 40 | 3/4 | 146 |
| 30 | 44 | 3/4 | 146 |
| 32 | 48 | 3/4 | 146 |
| 34 | 40 | 7/8 | 159 |
| 36 | 44 | 7/8 | 165 |
| 38 | 40 | 1 | 178 |
| 40 | 44 | 1 | 178 |
| 42 | 48 | 1 | 184 |
| 44 | 52 | 1 | 190 |
| 46 | 40 | 1.1/8 | 203 |
| 48 | 44 | 1.1/8 | 203 |
| 50 | 48 | 1.1/8 | 210 |
| 52 | 52 | 1.1/8 | 216 |
| 54 | 56 | 1.1/8 | 216 |
| 56 | 60 | 1.1/8 | 222 |
| 58 | 48 | 1.1/4 | 229 |
| 60 | 52 | 1.1/4 | 235 |
| Class 300 | |||
| NPS | No of Bolts |
Stud Bolt Dia x L |
|
| 26 | 32 | 1.1/4 | 260 |
| 28 | 36 | 1.1/4 | 260 |
| 30 | 36 | 1.3/8 | 273 |
| 32 | 32 | 1.1/2 | 298 |
| 34 | 36 | 1.1/2 | 298 |
| 36 | 32 | 1.3/8 | 305 |
| 38 | 36 | 1.3/8 | 324 |
| 40 | 40 | 1.5/8 | 330 |
| 42 | 36 | 1.3/4 | 343 |
| 44 | 40 | 1.3/4 | 362 |
| 46 | 36 | 1.7/8 | 368 |
| 48 | 40 | 1.7/8 | 368 |
| 50 | 44 | 1.7/8 | 387 |
| 52 | 48 | 1.7/8 | 400 |
| 54 | 48 | 1.7/8 | 387 |
| 56 | 36 | 2.1/4 | 438 |
| 58 | 40 | 2.1/4 | 438 |
| 60 | 40 | 2.1/4 | 432 |
| Class 400 | |||
| NPS | No of Bolts |
Stud Bolt Dia x L |
|
| 26 | 28 | 1.3/8 | 279 |
| 28 | 24 | 1.1/2 | 298 |
| 30 | 28 | 1.1/2 | 311 |
| 32 | 28 | 1.5/8 | 330 |
| 34 | 32 | 1.5/8 | 337 |
| 36 | 28 | 1.3/4 | 356 |
| 38 | 32 | 1.3/4 | 368 |
| 40 | 32 | 1.7/8 | 387 |
| 42 | 32 | 1.7/8 | 394 |
| 44 | 32 | 2 | 413 |
| 46 | 36 | 2 | 425 |
| 48 | 28 | 2.1/4 | 451 |
| 50 | 32 | 2.1/4 | 457 |
| 52 | 32 | 2.1/4 | 470 |
| 54 | 28 | 2.1/2 | 502 |
| 56 | 32 | 2.1/2 | 508 |
| 58 | 32 | 2.1/2 | 514 |
| 60 | 32 | 2.3/4 | 546 |
| Class 600 | |||
| NPS | No of Bolts |
Stud Bolt Dia x L |
|
| 26 | 28 | 1.5/8 | 337 |
| 28 | 28 | 1.3/4 | 349 |
| 30 | 28 | 1.7/8 | 375 |
| 32 | 28 | 2 | 394 |
| 34 | 24 | 2.1/4 | 425 |
| 36 | 28 | 2.1/4 | 438 |
| 38 | 28 | 2.1/4 | 451 |
| 40 | 32 | 2.1/4 | 464 |
| 42 | 28 | 2.1/2 | 495 |
| 44 | 32 | 2.1/2 | 508 |
| 46 | 32 | 2.1/2 | 521 |
| 48 | 32 | 2.3/4 | 552 |
| 50 | 28 | 3 | 578 |
| 52 | 32 | 3 | 591 |
| 54 | 32 | 3 | 603 |
| 56 | 32 | 3.1/4 | 635 |
| 58 | 32 | 3.1/4 | 641 |
| 60 | 28 | 3.1/2 | 679 |
| Class 900 | |||
| NPS | No of Bolts |
Stud Bolt Dia x L |
|
| 26 | 20 | 2.1/2 | 425 |
| 28 | 20 | 2.3/4 | 470 |
| 30 | 20 | 3 | 495 |
| 32 | 20 | 3 | 508 |
| 34 | 20 | 3.1/4 | 540 |
| 36 | 24 | 3 | 533 |
| 38 | 20 | 3.1/2 | 591 |
| 40 | 24 | 3.1/2 | 603 |
| 42 | 24 | 3.1/2 | 622 |
| 44 | 24 | 3.3/4 | 654 |
| 46 | 24 | 4 | 686 |
| 48 | 24 | 4 | 705 |
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General notes..
- Dimensions are in millimeters unless otherwise indicated.
- Length dimensional tolerances for all Stud Bolts..
length to 12 inch tolerance = ± 1.6 mm
length over 12 inch to 18 inch tolerance = ± 3.2 mm
length over 18 inch tolerance = ± 6.4 mm - The length of the Stud Bolt does not include the height of the chamfers (points).
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
