AWWA ANSI C207
SLIP-ON & BLIND FLANGES CLASS B, D & E
| NPS | Outside Diameter of Flange | Inside Diameter of Flange | THICKNESS OF FLANGE | Y | X | Diameter of Bolt Circle | Number of Bolt Holes | ||||
| Slip-on | B(1) | D(2) | E(3) | ||||||||
| O | B | C | C | C | C | Y | X | ||||
| 26 | in. | 34.25 | 26.19 | 1 | ... | ... | ... | 1.75 | 28.5 | 31.75 | 24 |
| mm | 870 | 665.22 | 25.4 | ... | ... | ... | 44.5 | 723.9 | 806.5 | . | |
| 28 | in. | 36.5 | 28.19 | 1 | ... | ... | ... | 1.75 | 30.5 | 34 | 28 |
| mm | 927.1 | 716.02 | 25.4 | ... | ... | ... | 44.5 | 774.7 | 863.6 | ||
| 30 | in. | 38.75 | 30.19 | 1 | 1.53 | 2 | 2.88 | 1.75 | 32.5 | 28 | |
| mm | 984.3 | 766.82 | 25.4 | 38.86 | 50.88 | 50.88 | 44.5 | 825.5 | . | ||
| 32 | in. | 41.75 | 32.19 | 1.12 | ... | ... | ... | 1.75 | 34.75 | 38.5 | 28 |
| mm | 1060.5 | 817.62 | 28.4 | ... | ... | ... | 44.5 | 882.7 | 977.9 | . | |
| 34 | in. | 43.75 | 34.19 | 1.12 | ... | ... | ... | 1.75 | 36.75 | 40.5 | 32 |
| mm | 1111.3 | 868.42 | 28.4 | ... | ... | ... | 44.5 | 933.5 | 1028.7 | . | |
| 36 | in. | 46 | 36.19 | 1.12 | 1.83 | 2.37 | 3.34 | 1.75 | 38.75 | 42.75 | 32 |
| mm | 1168.4 | 919.22 | 28.4 | 46.58 | 60.17 | 84.93 | 44.5 | 984.3 | 1085.9 | . | |
| 38 | in. | 48.75 | 38.19 | 1.12 | ... | ... | ... | 1.75 | 40.75 | 45.25 | 32 |
| mm | 1238.3 | 970.02 | 28.4 | ... | ... | ... | 44.5 | 1035.1 | 1149.4 | . | |
| 40 | in. | 50.75 | 40.19 | 1.12 | ... | ... | ... | 1.75 | 43 | 47.25 | 36 |
| mm | 1289.1 | 1020.82 | 28.4 | ... | ... | ... | 44.5 | 1092.2 | 1200.2 | . | |
| 42 | in. | 53 | 42.19 | 1.25 | 2.08 | 2.73 | 3.79 | 1.75 | 45 | 49.5 | 36 |
| mm | 1346.2 | 1071.62 | 31.8 | 52.93 | 69.21 | 96.24 | 44.5 | 1143 | 1257.3 | . | |
| 44 | in. | 55.25 | 44.19 | 1.25 | ... | ... | ... | 2.25 | 47 | 51.75 | 40 |
| mm | 1403.4 | 1122.42 | 31.8 | ... | ... | ... | 57.2 | 1193.8 | 1314.5 | . | |
| 46 | in. | 57.25 | 46.19 | 1.25 | ... | ... | ... | 2.25 | 49 | 53.75 | 40 |
| mm | 1454.2 | 1173.22 | 31.8 | ... | ... | ... | 57.2 | 1244.6 | 1365.3 | ||
| 48 | in. | 59.5 | 48.19 | 1.38 | 2.34 | 3.07 | 4.25 | 2.5 | 51 | 56 | 44 |
| mm | 1511.3 | 1224.02 | 34.92 | 59.46 | 77.9 | 107.85 | 63.5 | 1295.4 | 1422.4 | ||
| 50 | in. | 61.75 | 50.19 | 1.38 | ... | ... | ... | 2.5 | 53 | 58.25 | 44 |
| mm | 1568.5 | 1274.82 | 34.92 | ... | ... | ... | 63.5 | 1346.2 | 1479.6 | ||
| 52 | in. | 64 | 52.19 | 1.38 | ... | ... | ... | 2.5 | 55 | 60.5 | 44 |
| mm | 1625.6 | 1325.62 | 34.92 | ... | ... | ... | 63.5 | 1397 | 1536.7 | . | |
| 54 | in. | 66.25 | 54.19 | 1.38 | 2.63 | 3.43 | 4.78 | 2.5 | 57 | 44 | |
| mm | 1682.8 | 1376.42 | 34.92 | 66.9 | 87.15 | 121.31 | 63.5 | 1447.8 | 1593.9 | ||
| 60 | in. | 73 | 60.19 | 1.5 | 2.89 | 3.77 | 5.24 | 2.75 | 63 | 52 | |
| mm | 1854.2 | 1528.82 | 38.1 | 73.46 | 95.86 | 132.99 | 69.9 | 1600.2 | 1759 | ||
| 66 | in. | 80 | 66.19 | 1.5 | 3.14 | 4.13 | 5.67 | 2.75 | 69 | 52 | |
| mm | 2032 | 1681.22 | 38.1 | 79.73 | 104.95 | 144.12 | 69.9 | 1752.6 | 1930.4 | ||
| 72 | in. | 86.5 | 72.19 | 1.5 | 3.4 | 4.48 | 6.14 | 2.75 | 75 | 60 | |
| mm | 2197.1 | 1833.62 | 38.1 | 86.33 | 113.69 | 155.88 | 69.9 | 1905 | 2095.5 |
Disclaimer: These dimensions are provided for reference material only.