American Flange Standards
ASME B16.48 Class 150 spectacle blind specifications cover nominal pipe sizes from 15mm (1/2") to 600mm (24"). These line blanks are isolation devices used between flanges.
| CL 150 | ||||||||
|---|---|---|---|---|---|---|---|---|
| NOMINAL PIPE SIZE | DIAMETER | OUTSIDE DIAMETER | CENTRE LINE SPACING | THICKNESS MIN | WEB LENGTH | NOMINAL PIPE SIZE | ||
| MM | INCH | ID | OD | A | T | B | MM | INCH |
| 15 | 1/2 | 16 | 45 | 60 | 3 | 38 | 15 | 1/2 |
| 20 | 3/4 | 21 | 54 | 73 | 3 | 38 | 20 | 3/4 |
| 25 | 1 | 27 | 64 | 79 | 3 | 38 | 25 | 1 |
| 32 | 1 1/4 | 42 | 83 | 89 | 6.4 | 38 | 32 | 1 1/4 |
| 40 | 1 1/2 | 48 | 93 | 98 | 6.4 | 38 | 40 | 1 1/2 |
| 50 | 2 | 61 | 102 | 121 | 6.4 | 51 | 50 | 2 |
| 65 | 2 1/2 | 73 | 121 | 146 | 6.4 | 51 | 65 | 2 1/2 |
| 80 | 3 | 89 | 133 | 152 | 6.4 | 64 | 80 | 3 |
| 90 | 3 1/2 | 102 | 153 | 174 | 9.7 | 64 | 90 | 3 1/2 |
| 100 | 4 | 114 | 172 | 191 | 9.7 | 64 | 100 | 4 |
| 125 | 5 | 140 | 210 | 219 | 9.7 | 76 | 125 | 5 |
| 150 | 6 | 168 | 248 | 241 | 12.7 | 76 | 150 | 6 |
| 200 | 8 | 219 | 305 | 295 | 12.7 | 89 | 200 | 8 |
| 250 | 10 | 273 | 337 | 362 | 15.7 | 102 | 250 | 10 |
| 300 | 12 | 324 | 406 | 432 | 19.1 | 102 | 300 | 12 |
| 350 | 14 | 356 | 448 | 476 | 19.1 | 108 | 350 | 14 |
| 400 | 16 | 406 | 511 | 540 | 22.4 | 108 | 400 | 16 |
| 450 | 18 | 457 | 556 | 583 | 25.4 | 114 | 450 | 18 |
| 500 | 20 | 508 | 603 | 635 | 28.5 | 121 | 500 | 20 |
| 600 | 24 | 610 | 711 | 737 | 31.8 | 140 | 600 | 24 |
NOTES:
NOTES:(1) The normal full face is as shown they are also available as raised face, female ring joint or male ring joint however the sizes change.
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