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» Flange & Fitting » AWWA C207 Class E Blind Flange
AWWA C207 Class E Blind Flange
July 8, 2020
Technical Drawing
The drawing of AWWA C207 Class E blind flange, with flat face (FF), available from 4″ through 72″.
The working pressure limit at water service temperature for AWWA C207 Class E blind flange is 275 psi and the maximum pressure (test or transient) allowed can be up to 412.5 psi. These flanges have the same outside diameter and drilling pattern as ASME B16.1 Class 125 cast-iron flanges. In sizes 24″ and smaller, they also match ASME B16.5 Class 150 standard for steel flanges.
Dimensions & Masses
| NPS | A | T | Mass |
|---|---|---|---|
| 4" | 9.00 | 1.125 | 8.70 |
| 5" | 10.00 | 1.188 | 11.27 |
| 6" | 11.00 | 1.313 | 15.24 |
| 8" | 13.50 | 1.500 | 26.69 |
| 10" | 16.00 | 1.563 | 38.53 |
| 12" | 19.00 | 1.750 | 61.71 |
| 14" | 21.00 | 1.875 | 80.66 |
| 16" | 23.50 | 2.000 | 107.50 |
| 18" | 25.00 | 2.125 | 128.82 |
| 20" | 27.50 | 2.375 | 173.97 |
| 22" | 29.50 | 2.500 | 210.26 |
| 24" | 32.00 | 2.625 | 261.55 |
| 26" | 34.25 | 2.750 | 313.32 |
| 28" | 36.50 | 2.750 | 355.44 |
| 30" | 38.75 | 2.875 | 420.78 |
| 32" | 41.75 | 2.875 | 505.91 |
| 34" | 43.75 | 3.050 | 563.78 |
| 36" | 46.00 | 3.209 | 658.64 |
| 38" | 48.75 | 3.394 | 785.96 |
| 40" | 50.75 | 3.533 | 885.41 |
| 42" | 53.00 | 3.695 | 1013.15 |
| 44" | 55.25 | 3.857 | 1148.37 |
| 46" | 57.25 | 3.997 | 1280.91 |
| 48" | 59.50 | 4.159 | 1438.77 |
| 50" | 61.75 | 4.327 | 1599.32 |
| 52" | 64.00 | 4.489 | 1787.52 |
| 54" | 66.25 | 4.651 | 1989.74 |
| 60" | 73.00 | 5.116 | 2659.97 |
| 66" | 80.00 | 5.601 | 3518.20 |
| 72" | 86.50 | 6.066 | 4456.32 |
*For AWWA C207 Class E blind, the minimum thickness is based on allowable stress of 16000 psi and allowable bolt stress of 25000 psi.
| NPS | n | C | d |
|---|---|---|---|
| 4" | 8 | 7.50 | 0.625 |
| 5" | 8 | 8.50 | 0.750 |
| 6" | 8 | 9.50 | 0.750 |
| 8" | 8 | 11.75 | 0.750 |
| 10" | 12 | 14.25 | 0.875 |
| 12" | 12 | 17.00 | 0.875 |
| 14" | 12 | 18.75 | 1.000 |
| 16" | 16 | 21.25 | 1.000 |
| 18" | 16 | 22.75 | 1.125 |
| 20" | 20 | 25.00 | 1.125 |
| 22" | 20 | 27.25 | 1.250 |
| 24" | 20 | 29.50 | 1.250 |
| 26" | 24 | 31.75 | 1.250 |
| 28" | 28 | 34.00 | 1.250 |
| 30" | 28 | 36.00 | 1.250 |
| 32" | 28 | 38.50 | 1.500 |
| 34" | 32 | 40.50 | 1.500 |
| 36" | 32 | 42.75 | 1.500 |
| 38" | 32 | 45.25 | 1.500 |
| 40" | 36 | 47.25 | 1.500 |
| 42" | 36 | 49.50 | 1.500 |
| 44" | 40 | 51.75 | 1.500 |
| 46" | 40 | 53.75 | 1.500 |
| 48" | 44 | 56.00 | 1.500 |
| 50" | 44 | 58.25 | 1.750 |
| 52" | 44 | 60.50 | 1.750 |
| 54" | 44 | 62.75 | 1.750 |
| 60" | 52 | 69.25 | 1.750 |
| 66" | 52 | 76.00 | 1.750 |
| 72" | 60 | 82.50 | 1.750 |
| AWWA C207 Pipe Flange Dimensions & Masses |
|
|---|---|
| Ring Flange | Class B | Class D Class E | Class F |
| Blind Flange | Class B | Class D Class E | Class F |
| Hub Flange | Class D | Class E |
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