Blind Flange Dimensions
| NPS | O | tf |
| 1/2 | 135 | 30.2 |
| 3/4 | 140 | 31.8 |
| 1 | 160 | 35 |
| 1-1/4 | 185 | 38.1 |
| 1-1/2 | 205 | 44.5 |
| 2 | 235 | 50.9 |
| 2-1/2 | 265 | 57.2 |
| 3 | 305 | 66.7 |
| 4 | 355 | 76.2 |
| 5 | 420 | 92.1 |
| 6 | 485 | 108 |
| 8 | 550 | 127 |
| 10 | 675 | 165.1 |
| 12 | 760 | 184.2 |
| NPS | O | tf |
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Templates for drilling of bolt holes
Flange Drilling Template
| NPS | BCD | BHD | BOLTS | BD |
| 1/2 | 88.9 | 7/8 | 4 | 3/4 |
| 3/4 | 95.2 | 7/8 | 4 | 3/4 |
| 1 | 108.0 | 1 | 4 | 7/8 |
| 1-1/4 | 130.2 | 1-1/8 | 4 | 1 |
| 1-1/2 | 146.0 | 1-1/4 | 4 | 1-1/8 |
| 2 | 171.4 | 1-1/8 | 8 | 1 |
| 2-1/2 | 196.8 | 1-1/4 | 8 | 1-1/8 |
| 3 | 228.6 | 1-3/8 | 8 | 1-1/4 |
| 4 | 273.0 | 1-5/8 | 8 | 1-1/2 |
| 5 | 323.8 | 1-7/8 | 8 | 1-3/4 |
| 6 | 368.3 | 2-1/8 | 8 | 2 |
| 8 | 438.2 | 2-1/8 | 12 | 2 |
| 10 | 539.8 | 2-5/8 | 12 | 2-1/2 |
| 12 | 619.1 | 2-7/8 | 12 | 2-3/4 |
| NPS | BCD | BHD | BOLTS | BD |
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Flange Drilling Template
| NPS | SBL RFY | SBL RJ | MBL RF |
| 1/2 | 120 | 115 | 120 |
| 3/4 | 125 | 120 | 125 |
| 1 | 140 | 135 | 140 |
| 1-1/4 | 150 | 145 | 150 |
| 1-1/2 | 170 | 165 | 170 |
| 2 | 180 | 170 | 180 |
| 2-1/2 | 195 | 190 | 205 |
| 3 | 220 | 215 | 230 |
| 4 | 255 | 250 | 260 |
| 5 | 300 | 290 | 310 |
| 6 | 345 | 335 | 355 |
| 8 | 380 | 375 | 395 |
| 10 | 490 | 485 | 510 |
| 12 | 540 | 535 | 560 |
| NPS | SBL RFY | SBL RJ | MBL RF |
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General Notes
Dimensions are in millimeters, except for diameters of bolts and bolt holes, which are in inch units.
