| Nom. Pipe Size | Thrds per inch | PIPE O.D. | Pipe I.D. (ANSI Schedule) | Nom. Pipe Size | Tap Drill Sizes | Thread Length | Nom. Pipe Size | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N/A THREADED | 40 | 80 | 120 custom | 160 | XX | NPT National Pipe Thread for Pressure Sealing | SPT Straight Pipe Thread for Mechanical Connection | Total Inches ext. Thread | Makeup after tightening | ||||||||
| 5 | 10 | ||||||||||||||||
| 1/8 | 27 | .405 | n/a | .307 | .269 | .215 | — | — | — | 1/8 | 21/64 | .328 | 11/32 | .344 | .392 | .291 | 1/8 |
| 1/4 | 18 | .540 | n/a | .410 | .364 | .302 | — | — | — | 1/4 | 27/64 | .422 | 7/16 | .438 | .595 | .367 | 1/4 |
| 3/8 | 18 | .675 | n/a | .545 | .493 | .423 | — | — | — | 3/8 | 9/16 | .563 | 37/64 | .578 | .601 | .407 | 3/8 |
| 1/2 | 14 | .840 | .710 | .674 | .622 | .546 | .480 | .466 | .252 | 1/2 | 11/16 | .688 | 23/32 | .719 | .782 | .534 | 1/2 |
| 3/4 | 14 | 1.050 | .920 | .884 | .824 | .742 | .690 | .614 | .434 | 3/4 | 57/64 | .891 | 59/64 | .922 | .794 | .553 | 3/4 |
| 1 | 11.5 | 1.315 | 1.185 | 1.097 | 1.049 | .957 | .891 | .815 | .599 | 1 | 1 1/8 | 1.125 | 1 5/32 | 1.156 | .985 | .661 | 1 |
| 1 1/4 | 11.5 | 1.660 | 1.530 | 1.442 | 1.380 | 1.278 | 1.204 | 1.160 | .896 | 1 1/4 | 1-15/32 | 1.469 | 1 1/2 | 1.500 | 1.009 | .681 | 1 1/4 |
| 1 1/2 | 11.5 | 1.900 | 1.777 | 1.682 | 1.610 | 1.500 | 1.423 | 1.338 | 1.100 | 1 1/2 | 1 23/32 | 1.719 | 1 3/4 | 1.750 | 1.025 | .681 | 1 1/2 |
| 2 | 11.5 | 2.375 | 2.245 | 2.157 | 2.067 | 1.939 | 1.845 | 1.689 | 1.503 | 2 | 2 3/16 | 2.188 | 2 7/32 | 2.219 | 1.058 | .697 | 2 |
| 2 1/2 | 8 | 2.875 | 2.709 | 2.635 | 2.469 | 2.323 | 2.239 | 2.125 | 1.771 | 2 1/2 | 2 19/32 | 2.594 | 2 21/32 | 2.656 | 1.571 | .932 | 2 1/2 |
| 3 | 8 | 3.500 | 3.334 | 3.260 | 3.068 | 2.900 | 2.758 | 2.624 | 2.300 | 3 | 3 1/4 | 3.250 | 3 5/16 | 3.31 | 1.634 | 1.016 | 3 |
| 3 1/2 | 8 | 4.000 | 3.834 | 3.760 | 3.548 | 3.364 | — | — | 2.728 | 3 1/2 | 3 3/4 | 3.750 | 3 13/16 | 3.81 | 1.684 | 1.071 | 3 1/2 |
| 4 | 8 | 4.500 | 4.334 | 4.260 | 4.026 | 3.826 | 3.624 | 3.438 | 3.152 | 4 | 4 1/4 | 4.250 | 4 5/16 | 4.31 | 1.734 | 1.094 | 4 |
| 5 | 8 | 5.563 | 5.345 | 5.295 | 5.047 | 4.813 | 4.563 | 4.313 | 4.603 | 5 | 5 5/16 | 5.315 | 5 3/8 | 5.375 | 1.840 | 1.187 | 5 |
| 6 | 8 | 6.625 | 6.407 | 6.357 | 6.065 | 5.761 | 5.501 | 5.189 | 4.897 | 6 | 6 3/8 | 6.375 | 6 7/16 | 6.437 | 1.946 | 1.208 | 6 |
| 8 | 8 | 8.625 | 8.407 | 8.329 | 7.981 | 7.625 | 7.189 | 6.813 | 6.875 | 8 | — | — | — | — | 2.146 | 1.313 | 8 |
| 150 # Flange ( 0.062″ face thickness) | |||||
|---|---|---|---|---|---|
| Nominal Pipe Size | O.D. | Thick * | O.D. of Raised Face | Diam. of Bolt Circle | Weight Blind LBS |
| 1 | 4.25 | .56 | 2.00 | 3.12 | 2 |
| 1 1/4 | 4.62 | .62 | 2.50 | 3.50 | 3 |
| 1 1/2 | 5.00 | .69 | 2.87 | 3.87 | 3 |
| 2 | 6.00 | .75 | 3.62 | 4.75 | 4 |
| 2 1/2 | 7.00 | .87 | 4.12 | 5.50 | 7 |
| 3 | 7.50 | .94 | 5.00 | 6.00 | 9 |
| 3 1/2 | 8.5 | .94 | 5.50 | 7.00 | 13 |
| 4 | 9.00 | .94 | 6.19 | 7.50 | 17 |
| 5 | 10.00 | .94 | 7.31 | 8.50 | 20 |
| 6 | 11.00 | 1.00 | 8.50 | 9.50 | 27 |
| 8 | 13.50 | 1.13 | 10.62 | 11.75 | 47 |
| 300 # Flange ( 0.062″ face thickness) | |||||
|---|---|---|---|---|---|
| Nominal Pipe Size | O.D. | Thick * | O.D. of Raised Face | Diam. of Bolt Circle | Weight Blind LBS |
| 1 | 4.87 | 0.69 | 2.00 | 3.50 | 4 |
| 1 1/4 | 5.25 | 0.75 | 2.50 | 3.87 | 6 |
| 1 1/2 | 6.12 | 0.81 | 2.87 | 4.50 | 7 |
| 2 | 6.50 | 0.87 | 3.62 | 5.00 | 8 |
| 2 1/2 | 7.50 | 1.00 | 4.12 | 5.87 | 12 |
| 3 | 8.25 | 1.12 | 5.00 | 6.62 | 16 |
| 3 1/2 | 9.00 | 1.19 | 5.50 | 7.25 | 21 |
| 4 | 10.00 | 1.25 | 6.19 | 7.87 | 28 |
| 5 | 11.00 | 1.38 | 7.31 | 9.25 | 37 |
| 6 | 12.50 | 1.44 | 8.50 | 10.62 | 48 |
| 8 | 15.00 | 1.62 | 10.63 | 13.00 | 79 |
|
600 # Flange ( 0.25″ face thickness) |
|||||
|---|---|---|---|---|---|
| Nominal Pipe Size | O.D. | Thick * | O.D. of Raised Face | Diam. of Bolt Circle | Weight Blind LBS |
| 1 | 4.87 | .94 | 2.00 | 3.50 | 4 |
| 1 1/4 | 5.25 | 1.06 | 2.50 | 3.87 | 6 |
| 1 1/2 | 6.12 | 1.12 | 2.87 | 4.50 | 8 |
| 2 | 6.50 | 1.25 | 3.62 | 5.00 | 10 |
|
2 1/2 |
7.50 | 1.38 | 4.13 | 5.87 | 15 |
| 3 | 8.25 | 1.50 | 5.00 | 6.62 | 20 |
| 31/2 | 9.00 | 1.63 | 5.50 | 7.25 | 29 |
| 4 | 10.75 | 1.75 | 6.19 | 8.50 | 41 |
| 5 | 13.00 | 2.00 | 7.31 | 10.50 | 68 |
| 6 | 14.00 | 2.12 | 8.50 | 11.50 | 86 |
| 8 | 16.50 | 2.44 | 10.63 | 13.75 | 139 |
