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ASME B 16.47 A
ASME B16.47 B
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Approx Weight
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PL Flanges (EN1092.1)
WN Flanges (EN1092.1)
SO Flanges (EN1092.1)
Th Flanges (EN1092.1)
BL Flanges (EN1092.1)
Backing Rings

AWWA Steel Ring 

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
4 100 228.60 116.08 8 190.50 15.88 15.88 15.88
5 125 254.00 143.76 8 215.90 19.05 15.88 15.88
6 150 279.40 170.69 8 241.30 19.05 17.48 17.48
8 200 342.90 221.49 8 298.45 19.05 17.48 17.48
10 250 406.40 276.35 12 361.95 22.23 17.48 17.48
12 300 482.60 327.15 12 431.80 22.23 17.48 18.26
14 350 533.40 360.43 12 476.25 25.40 17.48 20.1
16 400 596.90 411.23 16 539.75 25.40 17.48 22.66
18 450 635.00 462.03 16 577.85 28.58 17.48 24.13
20 500 698.50 512.83 20 635.00 28.58 17.48 26.42
22 550 749.30 563.63 20 692.15 31.75 19.05 28.74
24 600 812.80 614.43 20 749.30 31.75 19.05 30.89
26 650 869.95 　 24 806.45 31.75 20.62 33.2
28 700 927.10 　 28 863.60 31.75 22.23 35.5
30 750 984.25 　 28 914.40 31.75 22.23 37.53
32 800 1060.45 　 28 977.90 38.10 23.83 40.16
34 850 1111.25 　 32 1028.70 38.10 23.83 42.19
36 900 1168.40 　 32 1085.85 38.10 25.40 44.48
38 950 1238.25 　 32 1149.35 38.10 25.40 47.06
40 1000 1289.05 　 36 1200.15 38.10 25.40 49.09
42 1050 1346.20 　 36 1257.30 38.10 28.58 51.4
44 1100 1403.35 　 40 1314.45 38.10 28.58 53.7
46 1150 1454.15 　 40 1365.25 38.10 28.58 55.73
48 1200 1511.30 　 44 1422.40 38.10 31.75 58.03
50 1250 1568.45 　 44 1479.55 44.45 31.75 60.38
52 1300 1625.60 　 44 1536.70 44.45 31.75 62.69
54 1350 1682.75 　 44 1593.85 44.45 34.93 64.99
60 1500 1854.20 　 52 1758.95 44.45 38.10 71.63
66 1650 2032.00 　 52 1930.40 44.45 41.28 78.53
72 1800 2197.10 　 60 2095.50 44.45 44.45 85.17
78 1950 2362.20 　 64 2260.60 50.80 50.80 　
84 2100 2533.65 　 64 2425.70 50.80 50.80 　
90 2250 2705.10 　 68 2590.80 57.15 57.15 　
96 2400 2876.55 　 68 2755.90 57.15 57.15 　
102 2550 3048.00 　 72 2908.30 63.50 63.50 　
108 2700 3219.45 　 72 3067.05 63.50 63.50 　
114 2850 3390.90 　 76 3219.45 69.85 69.85 　
120 3000 3562.35 　 76 3371.85 69.85 69.85 　
126 3150 3733.80 　 80 3536.95 76.20 76.20 　
132 3300 3905.25 　 80 3702.05 76.20 76.20 　
144 3600 4248.15 　 84 4019.55 82.55 82.55 　

 

AWWA steel-ring flanges, class D  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
4 100 228.60 116.078 8 190.50 15.88 15.88 15.88
5 125 254.00 143.764 8 215.90 19.05 15.88 16.51
6 150 279.40 170.688 8 241.30 19.05 17.48 17.59
8 200 342.90 221.488 8 298.45 19.05 17.48 20.62
10 250 406.40 276.352 12 361.95 22.23 17.48 24.21
12 300 482.60 327.152 12 431.80 22.23 20.62 28.37
14 350 533.40 360.426 12 476.25 25.40 23.83 28.78
16 400 596.90 411.226 16 539.75 25.40 25.40 32.13
18 450 635.00 462.026 16 577.85 28.58 26.97 33.81
20 500 698.50 512.826 20 635.00 28.58 28.58 36.77
22 550 749.30 563.626 20 692.15 31.75 30.18 39.83
24 600 812.80 614.426 20 749.30 31.75 31.75 42.18
26 650 869.95 　 24 806.45 31.75 33.32 45.37
28 700 927.10 　 28 863.60 31.75 33.32 48.4
30 750 984.25 　 28 914.40 31.75 34.93 51
32 800 1060.45 　 28 977.90 38.10 38.10 54.6
34 850 1111.25 　 32 1028.70 38.10 38.10 57.21
36 900 1168.40 　 32 1085.85 38.10 41.28 60.2
38 950 1238.25 　 32 1149.35 38.10 41.28 63.66
40 1000 1289.05 　 36 1200.15 38.10 41.28 66.28
42 1050 1346.20 　 36 1257.30 38.10 44.45 69.32
44 1100 1403.35 　 40 1314.45 38.10 44.45 72.36
46 1150 1454.15 　 40 1365.25 38.10 44.45 74.99
48 1200 1511.30 　 44 1422.40 38.10 47.63 78.03
50 1250 1568.45 　 44 1479.55 44.45 50.80 81.18
52 1300 1625.60 　 44 1536.70 44.45 50.80 84.21
54 1350 1682.75 　 44 1593.85 44.45 53.98 87.25
60 1500 1854.20 　 52 1758.95 44.45 57.15 95.97
66 1650 2032.00 　 52 1930.40 44.45 63.50 105.6
72 1800 2197.10 　 60 2095.50 44.45 66.68 113.8
78 1950 2362.20 　 64 2260.60 50.80 69.85 　
84 2100 2533.65 　 64 2425.70 50.80 73.03 　
90 2250 2705.10 　 68 2590.80 57.15 76.20 　
96 2400 2876.55 　 68 2755.90 57.15 82.55 　
102 2550 3048.00 　 72 2908.30 63.50 82.55 　
108 2700 3219.45 　 72 3067.05 63.50 85.73 　
114 2850 3390.90 　 76 3219.45 69.85 88.90 　
120 3000 3562.35 　 76 3371.85 69.85 88.90 　
126 3150 3733.80 　 80 3536.95 76.20 95.25 　
132 3300 3905.25 　 80 3702.05 76.20 98.43 　
144 3600 4248.15 　 84 4019.55 82.55 104.78 　

 

AWWA steel-ring flanges, class E  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
4 100 228.60 116.08 8 190.50 15.88 15.88 28.58
5 125 254.00 143.76 8 215.90 19.05 19.05 30.18
6 150 279.40 170.69 8 241.30 19.05 19.05 33.35
8 200 342.90 221.49 8 298.45 19.05 19.05 38.1
10 250 406.40 276.35 12 361.95 22.23 22.23 39.7
12 300 482.60 327.15 12 431.80 22.23 22.23 44.45
14 350 533.40 360.43 12 476.25 25.40 25.40 47.63
16 400 596.90 411.23 16 539.75 25.40 25.40 50.8
18 450 635.00 462.03 16 577.85 28.58 28.58 53.98
20 500 698.50 512.83 20 635.00 28.58 28.58 60.33
22 550 749.30 563.63 20 692.15 31.75 31.75 63.5
24 600 812.80 614.43 20 749.30 31.75 31.75 66.68
26 650 869.95 　 24 806.45 31.75 31.75 69.85
28 700 927.10 　 28 863.60 31.75 31.75 69.85
30 750 984.25 　 28 914.40 31.75 31.75 73.03
32 800 1060.45 　 28 977.90 38.10 38.10 76.2
34 850 1111.25 　 32 1028.70 38.10 38.10 77.46
36 900 1168.40 　 32 1085.85 38.10 38.10 81.51
38 950 1238.25 　 32 1149.35 38.10 38.10 86.2
40 1000 1289.05 　 36 1200.15 38.10 38.10 89.74
42 1050 1346.20 　 36 1257.30 38.10 38.10 93.86
44 1100 1403.35 　 40 1314.45 38.10 38.10 97.97
46 1150 1454.15 　 40 1365.25 38.10 38.10 101.53
48 1200 1511.30 　 44 1422.40 38.10 38.10 105.65
50 1250 1568.45 　 44 1479.55 44.45 44.45 109.9
52 1300 1625.60 　 44 1536.70 44.45 44.45 114.02
54 1350 1682.75 　 44 1593.85 44.45 44.45 118.14
60 1500 1854.20 　 52 1758.95 44.45 44.45 129.95
66 1650 2032.00 　 52 1930.40 44.45 44.45 142.26
72 1800 2197.10 　 60 2095.50 44.45 44.45 154.08
78 1950 2362.20 　 64 2260.60 50.80 50.80 　
84 2100 2533.65 　 64 2425.70 50.80 50.80 　
90 2250 2705.10 　 68 2590.80 57.15 57.15 　
96 2400 2876.55 　 68 2755.90 57.15 57.15 　
102 2550 3048.00 　 72 2908.30 63.50 63.50 　
108 2700 3219.45 　 72 3067.05 63.50 63.50 　
114 2850 3390.90 　 76 3219.45 69.85 69.85 　
120 3000 3562.35 　 76 3371.85 69.85 69.85 　
126 3150 3733.80 　 80 3536.95 76.20 76.20 　
132 3300 3905.25 　 80 3702.05 76.20 76.20 　
144 3600 4248.15 　 84 4019.55 82.55 82.55 　

 

AWWA steel-ring flanges, class F  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
4 100 254.00 116.08 8 200.15 19.05 28.70 28.7
5 125 279.40 143.76 8 234.95 19.05 30.73 30.73
6 150 317.50 170.94 12 269.75 19.05 33.27 33.27
8 200 381.00 221.74 12 330.20 22.23 33.27 33.27
10 250 444.50 276.35 16 387.35 25.40 38.10 38.1
12 300 520.70 327.15 16 450.85 28.58 41.40 41.4
14 350 584.20 360.43 20 514.35 28.58 49.28 49.28
16 400 647.70 411.23 20 571.50 31.75 54.36 54.36
18 450 711.20 462.03 24 628.65 31.75 57.15 57.125
20 500 774.70 512.83 24 685.80 31.75 59.18 59.18
22 550 838.20 563.63 24 742.95 31.75 63.50 63.5
24 600 914.40 614.43 24 812.80 38.10 68.33 68.53
26 650 971.55 　 28 876.30 44.45 76.20 76.2
28 700 1035.05 　 28 939.80 44.45 79.50 79.5
30 750 1092.20 　 28 996.95 44.45 80.01 80.42
32 800 1149.35 　 28 1054.10 44.45 82.55 84.62
34 850 1206.50 　 28 1104.90 44.45 85.85 88.25
36 900 1270.00 　 32 1168.40 50.80 87.88 93.25
38 950 1327.15 　 32 1219.20 50.80 88.90 96.9
40 1000 1377.95 　 36 1276.35 50.80 92.20 101.4
42 1050 1447.80 　 36 1339.85 50.80 96.77 105.92
44 1100 1504.95 　 36 1397.00 50.80 101.60 110.19
46 1150 1562.10 　 40 1454.15 50.80 104.90 114.43
48 1200 1651.00 　 40 1543.05 50.80 114.30 121.44

Genuine knowledge comes from practice - Karl Marx
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