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Martin
AWWA steel-ring flanges, class B AWWA C207
| NPS | DN | OD, A | ID, B | Number of Bolts | Diam.of Bolt Circle, C | Diam.of Bolt | Thickness of Flange, T | Thickness of Blind, T |
| 4 | 100 | 228.6 | 116.08 | 8 | 190.5 | 15.88 | 15.88 | 15.88 |
| 5 | 125 | 254 | 143.76 | 8 | 215.9 | 19.05 | 15.88 | 15.88 |
| 6 | 150 | 279.4 | 170.69 | 8 | 241.3 | 19.05 | 17.48 | 17.48 |
| 8 | 200 | 342.9 | 221.49 | 8 | 298.45 | 19.05 | 17.48 | 17.48 |
| 10 | 250 | 406.4 | 276.35 | 12 | 361.95 | 22.23 | 17.48 | 17.48 |
| 12 | 300 | 482.6 | 327.15 | 12 | 431.8 | 22.23 | 17.48 | 18.26 |
| 14 | 350 | 533.4 | 360.43 | 12 | 476.25 | 25.4 | 17.48 | 20.1 |
| 16 | 400 | 596.9 | 411.23 | 16 | 539.75 | 25.4 | 17.48 | 22.66 |
| 18 | 450 | 635 | 462.03 | 16 | 577.85 | 28.58 | 17.48 | 24.13 |
| 20 | 500 | 698.5 | 512.83 | 20 | 635 | 28.58 | 17.48 | 26.42 |
| 22 | 550 | 749.3 | 563.63 | 20 | 692.15 | 31.75 | 19.05 | 28.74 |
| 24 | 600 | 812.8 | 614.43 | 20 | 749.3 | 31.75 | 19.05 | 30.89 |
| 26 | 650 | 869.95 | 24 | 806.45 | 31.75 | 20.62 | 33.2 | |
| 28 | 700 | 927.1 | 28 | 863.6 | 31.75 | 22.23 | 35.5 | |
| 30 | 750 | 984.25 | 28 | 914.4 | 31.75 | 22.23 | 37.53 | |
| 32 | 800 | 1060.45 | 28 | 977.9 | 38.1 | 23.83 | 40.16 | |
| 34 | 850 | 1111.25 | 32 | 1028.7 | 38.1 | 23.83 | 42.19 | |
| 36 | 900 | 1168.4 | 32 | 1085.85 | 38.1 | 25.4 | 44.48 | |
| 38 | 950 | 1238.25 | 32 | 1149.35 | 38.1 | 25.4 | 47.06 | |
| 40 | 1000 | 1289.05 | 36 | 1200.15 | 38.1 | 25.4 | 49.09 | |
| 42 | 1050 | 1346.2 | 36 | 1257.3 | 38.1 | 28.58 | 51.4 | |
| 44 | 1100 | 1403.35 | 40 | 1314.45 | 38.1 | 28.58 | 53.7 | |
| 46 | 1150 | 1454.15 | 40 | 1365.25 | 38.1 | 28.58 | 55.73 | |
| 48 | 1200 | 1511.3 | 44 | 1422.4 | 38.1 | 31.75 | 58.03 | |
| 50 | 1250 | 1568.45 | 44 | 1479.55 | 44.45 | 31.75 | 60.38 | |
| 52 | 1300 | 1625.6 | 44 | 1536.7 | 44.45 | 31.75 | 62.69 | |
| 54 | 1350 | 1682.75 | 44 | 1593.85 | 44.45 | 34.93 | 64.99 | |
| 60 | 1500 | 1854.2 | 52 | 1758.95 | 44.45 | 38.1 | 71.63 | |
| 66 | 1650 | 2032 | 52 | 1930.4 | 44.45 | 41.28 | 78.53 | |
| 72 | 1800 | 2197.1 | 60 | 2095.5 | 44.45 | 44.45 | 85.17 | |
| 78 | 1950 | 2362.2 | 64 | 2260.6 | 50.8 | 50.8 | ||
| 84 | 2100 | 2533.65 | 64 | 2425.7 | 50.8 | 50.8 | ||
| 90 | 2250 | 2705.1 | 68 | 2590.8 | 57.15 | 57.15 | ||
| 96 | 2400 | 2876.55 | 68 | 2755.9 | 57.15 | 57.15 | ||
| 102 | 2550 | 3048 | 72 | 2908.3 | 63.5 | 63.5 | ||
| 108 | 2700 | 3219.45 | 72 | 3067.05 | 63.5 | 63.5 | ||
| 114 | 2850 | 3390.9 | 76 | 3219.45 | 69.85 | 69.85 | ||
| 120 | 3000 | 3562.35 | 76 | 3371.85 | 69.85 | 69.85 | ||
| 126 | 3150 | 3733.8 | 80 | 3536.95 | 76.2 | 76.2 | ||
| 132 | 3300 | 3905.25 | 80 | 3702.05 | 76.2 | 76.2 | ||
| 144 | 3600 | 4248.15 | 84 | 4019.55 | 82.55 | 82.55 |
AWWA steel-ring flanges, class B AWWA C207
Check the drawing and price list for the below standard from Eathu backing flange page.
AWWA-C207-HUB-FLANGE-AWWAC207-RING-FACTORY
AWWA C207-07 Flange Manufacturer
AWWA C207-07 Standard Steel Ring Flanges Class B
AWWA C207-07 Standard Steel Ring Flanges Class D
AWWA C207-07 Standard Steel Ring Flanges Class E
AWWA C207-07 Standard Steel Ring Flanges Class F
AWWA Standard Steel Hub Flanges
AWWA C207-07 Standard Steel Hub Flanges Class D
AWWA C207-07 Standard Steel Hub Flanges Class E
AWWA C207-94 Flange Manufacturer
AWWA C207-94 Standard Steel Ring Flanges Class B
AWWA C207-94 Standard Steel Ring Flanges Class D
AWWA C207-94 Standard Steel Ring Flanges Class E
AWWA C207-94 Standard Steel Ring Flanges Class F
AWWA Standard Steel Hub Flanges
AWWA C207-94 Standard Steel Hub Flanges Class D
AWWA C207-94 Standard Steel Hub Flanges Class E
Check EATHU AWWA C207 FLANGE
