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Awwa Flanges
 
 
 
AWWA Standard steel-ring flanges, class B*(86 psi) and class D B*(86)psiand class D +(175-150)psi
Nominal pipe Size OD Of Flanges (A) ID of Flanges (B+)in Number of bolts Diam Of Bolt Circle Diam Of Bolts Thickness Of Flange
Class B(T) Class D(T)
4 228.60 116.08 8 190.50 15.88 15.88 15.875
5 254.00 143.76 8 215.90 19.05 15.88 15.875
6 279.40 170.69 8 241.30 19.05 17.48 17.475
8 342.90 221.49 8 298.45 19.05 17.48 17.475
10 406.40 276.35 12 361.95 22.23 17.48 17.475
12 482.60 327.15 12 431.80 22.23 17.48 20.625
14 533.40 360.43 12 476.25 25.40 17.48 23.825
16 596.90 411.23 16 539.75 25.40 17.48 20.625
18 635.00 462.03 16 577.85 28.58 17.48 23.825
20 698.50 512.83 20 635.00 28.58 17.48 25.400
22 749.30 563.63 20 692.15 31.75 19.05 26.975
24 812.80 614.43 20 749.30 31.75 19.05 28.575
26 869.95   24 806.45 31.75 20.62 30.175
28 927.10   28 863.60 31.75 22.23 31.750
30 984.25   28 914.40 31.75 22.23 33.325
32 1060.45   28 977.90 38.10 23.83 33.325
34 1111.25   32 1028.70 38.10 23.83 34.925
36 1168.40   32 1085.85 38.10 25.40 38.100
38 1238.25   32 1149.35 38.10 25.40 41.275
40 1289.05   36 1200.15 38.10 25.40 41.275
42 1346.20   36 1257.30 38.10 28.58 44.450
44 1403.35   40 1314.45 38.10 28.58 44.450
46 1454.15   40 1365.25 38.10 28.58 44.450
48 1511.30   44 1422.40 38.10 31.75 47.625
50 1568.45   44 1479.55 44.45 31.75 50.800
52 1625.60   44 1536.70 44.45 31.75 50.800
54 1682.75   44 1593.85 44.45 34.93 56.261
60 1854.20   52 1530.35 44.45 38.10 57.150
66 2032.00   52 1930.40 44.45 41.28 63.500
72 2197.10   64 2095.50 44.45 44.45 66.675
78 2362.20   64 2260.60 50.80 50.80 70.002
84 2533.65   64 2425.70 50.80 50.80 73.025
90 2705.10   68 2590.80 57.15 57.15 76.200
96 2876.55   68 2755.90 57.15 57.15 82.550
102 3048.00   72 2908.30 63.50 63.50 82.550
108 3219.45   72 3067.05 63.50 63.50 85.725
114 3390.90   76 3219.45 69.85 69.85 88.900
120 3562.35   76 3371.85 69.85 69.85 88.900
126 3733.80   80 3536.95 76.20 76.20 95.250
132 3905.25   80 3702.05 76.20 76.20 98.425
138 4076.70   84 3860.80 82.55 82.55 101.600
144 4248.15   84 4019.55 82.55 82.55 104.775
Notes:  1.Ring Flanges may be overbored or counterbored to accommodate larger-outside_diameter pipe than that a shown as nominal.This is done to allow a clear inside diameter after cement -motor lining.Wrench clearence between  the pipe OD and bolt circle must be maintained as well as sufficient gasket seating area.
2.  Metric conversation: Nominal Pipe size: in. x25=mm
3. All dimensions are in mm
 
 
AWWA Standard  steel-hub flanges ,classB* * (86)psi and class D+(175-150 psi
Nominal pipe Size OD Of Flanges (A) ID of Flanges (B+)in Number of bolts Diam Of Bolt Circle Diam Of Bolts Flange Dimension
(T) (L) (E)
4 228.6 116.08 8 190.5 15.875 12.7 22.225 134.9248
5 254 143.76 8 215.9 19.05 14.2748 31.75 160.3248
6 279.4 170.69 8 241.3 19.05 14.2748 31.75 192.0748
8 342.9 221.49 8 298.45 19.05 14.2748 31.75 246.0752
10 406.4 276.35 12 361.95 22.225 17.4752 31.75 304.8
12 482.6 327.15 12 431.8 22.225 17.4752 31.75 365.125
14 533.4 360.43 12 476.25 25.4 19.05 31.75 400.05
16 596.9 411.23 16 539.75 25.4 19.05 31.75 457.2
18 635 462.03 16 577.85 28.575 19.05 31.75 504.825
20 698.5 512.83 20 635 28.575 19.05 31.75 558.8
22 749.3 563.63 20 692.15 31.75 25.4 44.45 615.95
24 812.8 614.43 20 749.3 31.75 25.4 44.45 663.575
26 869.95 665.23 24 806.45 31.75 25.4 44.45 723.9
28 927.1 716.03 28 863.6 31.75 25.4 44.45 774.7
30 984.25 766.83 28 914.4 31.75 25.4 44.45 825.5
32 1060.45 817.63 28 977.9 38.1 28.575 44.45 882.65
34 1111.25 868.43 32 1028.7 38.1 28.575 44.45 933.45
36 1168.4 919.23 32 1085.85 38.1 28.575 44.45 984.25
38 1238.25 970.03 32 1149.35 38.1 28.575 44.45 1035.05
40 1289.05 1020.83 36 1200.15 38.1 28.575 44.45 1092.2
42 1346.2 1071.63 36 1257.3 38.1 31.75 44.45 1143
44 1403.35 1122.43 40 1314.45 38.1 31.75 57.15 1193.8
46 1454.15 1173.23 40 1365.25 38.1 31.75 57.15 1244.6
48 1511.3 1224.03 44 1422.4 38.1 34.925 57.15 1295.4
50 1568.45 1274.83 44 1479.55 44.45 34.925 57.15 1346.2
52 1625.6 1325.63 44 1536.7 44.45 34.925 57.15 1397
54 1682.75 1376.43 44 1593.85 44.45 34.925 57.15 1447.8
60 1854.2 1528.83 52 1530.35 44.45 38.1 69.85 1600.2
66 2032 1681.23 52 1930.4 44.45 38.1 69.85 1752.6
72 2197.1 1833.63 64 2095.5 44.45 38.1 69.85 1905
78 2362.2 1986.03 64 2260.6 50.8 44.45 76.2 2063.75
84 2533.65 2138.43 64 2425.7 50.8 44.45 76.2 2222.5
90 2705.1 2290.83 68 2590.8 57.15 50.8 82.55 2381.25
96 2876.55 2443.23 68 2755.9 57.15 50.8 82.55 2540
Notes:
1. Hub flanges are to be used on pipe that has an OD equal to the nominal pipe size inin the first column.
2.  Metric conversation: Nominal Pipe size: in. x25=mm
3. All dimensions are in mm
 
 
AWWA standard steel-hub flange, class  el-hub flanges,classE*(275 psi)
Nominal pipe Size OD Of Flanges (A) ID of Flanges (B+)in Number of bolts Diam Of Bolt Circle Diam Of Bolts Flange Dimension
(T) (L) (E)
4 228.60 116.08 8 190.50 15.88 23.83 33.32 134.92
5 254.00 143.76 8 215.90 19.05 23.83 36.53 163.53
6 279.40 170.69 8 241.30 19.05 25.40 39.67 192.07
8 342.90 221.49 8 298.45 19.05 28.58 44.45 246.08
10 406.40 276.35 12 361.95 22.23 30.18 49.23 304.80
12 482.60 327.15 12 431.80 22.23 31.75 55.58 365.13
14 533.40 360.43 12 476.25 25.40 34.93 57.15 400.05
16 596.90 411.23 16 539.75 25.40 36.53 63.50 457.20
18 635.00 462.03 16 577.85 28.58 39.67 68.28 504.83
20 698.50 512.83 20 635.00 28.58 42.88 73.03 558.80
22 749.30 563.63 20 692.15 31.75 46.02 79.38 609.60
24 812.80 614.43 20 749.30 31.75 47.63 82.55 663.58
26 869.95 665.23 24 806.45 31.75 50.80 85.73 723.90
28 927.10 716.03 28 863.60 31.75 50.80 88.60 781.05
30 984.25 766.83 28 914.40 31.75 56.26 88.90 831.85
32 1060.45 817.63 28 977.90 38.10 57.15 92.08 889.00
34 1111.25 868.43 32 1028.70 38.10 58.72 93.68 939.80
36 1168.40 919.23 32 1085.85 38.10 60.33 95.25 996.95
38 1238.25 970.03 32 1149.35 38.10 60.33 95.25 1060.45
40 1289.05 1020.83 36 1200.15 38.10 63.50 98.43 1111.25
42 1346.20 1071.63 36 1257.30 38.10 66.68 101.60 1168.40
44 1403.35 1122.43 40 1314.45 38.10 66.68 101.60 1219.20
46 1454.15 1173.23 40 1365.25 38.10 68.28 103.17 1270.00
48 1511.30 1224.03 44 1422.40 38.10 69.85 104.78 1327.15
50 1568.45 1274.83 44 1479.55 44.45 69.85 104.78 1377.95
52 1625.60 1325.63 44 1536.70 44.45 73.03 107.95 1435.10
54 1682.75 1376.43 44 1593.85 44.45 76.20 111.13 1492.25
60 1854.20 1528.83 52 1530.35 44.45 79.38 114.30 1657.35
66 2032.00 1681.23 52 1930.40 44.45 85.73 123.83 1816.10
72 2197.10 1833.63 64 2095.50 44.45 88.90 127.00 1993.90
78 2362.20 1986.03 64 2260.60 50.80 98.43 136.53 2146.30
84 2533.65 2138.43 64 2425.70 50.80 98.43 136.53 2298.70
90 2705.10 2290.83 68 2590.80 57.15 107.95 146.05 2457.45
96 2876.55 2443.23 68 2755.90 57.15 107.95 146.05 2609.85
Notes:
1.  Hub flanges are to be used on pipe that has an OD equal to the nominal pipe size in the first column.
2.  Metric conversation: Nominal Pipe size: in. x25=mm
3.All dimensions are in mm
 
 
AWWA steel ring flanges, class E*(275psi)
Nominal pipe Size OD Of Flanges (A) ID of Flanges (B+)in Number of bolts Diam Of Bolt Circle Diam Of Bolts Thickness of Flanges
4 228.60 116.078 8 190.50 15.88 28.58
5 254.00 143.764 8 215.90 19.05 30.18
6 279.40 170.688 8 241.30 19.05 33.35
8 342.90 221.488 8 298.45 19.05 38.10
10 406.40 276.352 12 361.95 22.23 39.70
12 482.60 327.152 12 431.80 22.23 44.45
14 533.40 360.426 12 476.25 25.40 47.63
16 596.90 411.226 16 539.75 25.40 50.80
18 635.00 462.026 16 577.85 28.58 53.98
20 698.50 512.826 20 635.00 28.58 60.33
22 749.30 563.626 20 692.15 31.75 63.50
24 812.80 614.426 20 749.30 31.75 66.68
26 869.95   24 806.45 31.75 69.85
28 927.10   28 863.60 31.75 69.85
30 984.25   28 914.40 31.75 73.03
32 1060.45   28 977.90 38.10 76.20
34 1111.25   32 1028.70 38.10 76.20
36 1168.40   32 1085.85 38.10 79.38
38 1238.25   32 1149.35 38.10 79.38
40 1289.05   36 1200.15 38.10 82.55
42 1346.20   36 1257.30 38.10 85.73
44 1403.35   40 1314.45 38.10 85.73
46 1454.15   40 1365.25 38.10 87.33
48 1511.30   44 1422.40 38.10 88.90
50 1568.45   44 1479.55 44.45 88.90
52 1625.60   44 1536.70 44.45 92.08
54 1682.75   44 1593.85 44.45 95.25
60 1854.20   52 1530.35 44.45 98.43
66 2032.00   52 1930.40 44.45 107.95
72 2197.10   64 2095.50 44.45 111.13
78 2362.20   64 2260.60 50.80 120.65
84 2533.65   64 2425.70 50.80 120.65
90 2705.10   68 2590.80 57.15 130.18
96 2876.55   68 2755.90 57.15 130.18
102 3048.00   72 2908.30 63.50 139.70
108 3219.45   72 3067.05 63.50 139.70
114 3390.90   76 3219.45 69.85 149.23
120 3562.35   76 3371.85 69.85 149.23
126 3733.80   80 3536.95 76.20 158.75
132 3905.25   80 3702.05 76.20 158.75
138 4076.70   84 3860.80 82.55 171.45
144 4248.15   84 4019.55 82.55 171.45
Notes: 
1.Ring Flanges may be overbored or counterbored to accommodate larger-outside_diameter pipe than that a shown as nominal.This is done to allow a clear inside diameter after cement -motor lining.Wrench clearence between  the pipe OD and bolt circle must be maintained as well as sufficient gasket seating area.
2. Metric conversation: Nominal Pipe size: in. x25=mm
3.All dimensions are in mm
 
 
AWWA steel ring flanges, class E*(275psi) anges, classF*(300 psi)
Nominal pipe Size OD Of Flanges (A) ID of Flanges (B+)in Number of bolts Diam Of Bolt Circle Diam Of Bolts Thickness of flanges
4 254 116.08 8 200.15 19.05 28.70
5 279.4 143.76 8 234.95 19.05 30.73
6 317.5 170.94 12 269.75 19.05 33.27
8 381 221.74 12 330.20 22.23 33.27
10 444.5 276.35 16 387.35 25.4 38.10
12 520.7 327.15 16 450.85 28.58 41.40
14 584.2 360.43 20 514.35 28.58 49.28
16 647.7 411.23 20 571.50 31.75 54.36
18 711.2 462.03 24 628.65 31.75 57.15
20 774.7 512.83 24 685.80 31.75 59.18
22 838.2 563.63 24 742.95 31.75 63.50
24 914.4 614.43 24 812.80 38.1 68.33
26 971.55 666.75 28 876.30 44.45 76.20
28 1035.05 717.55 28 939.80 44.45 79.50
30 1092.2 768.35 28 768.35 44.45 80.01
32 1149.35 819.15 28 1054.10 44.45 82.55
34 1206.5 869.95 28 1104.90 44.45 85.85
36 1270 920.75 32 1168.40 50.8 87.88
38 1327.15 971.55 32 1219.20 50.8 88.90
40 1377.95 1022.35 36 1276.35 50.8 92.20
42 1447.8 1073.15 36 1339.85 50.8 96.77
44 1504.95 1123.95 36 1397.00 50.8 101.60
46 1562.1 1174.75 40 1454.15 50.8 104.90
48 1651 1225.55 40 1543.05 50.8 114.30
Notes:  1.Ring Flanges may be overbored or counterbored to accommodate larger-outside_diameter pipe than that a shown as nominal.This is done to allow a clear inside diameter after cement -motor lining.Wrench clearence between  the pipe OD and bolt circle must be maintained as well as sufficient gasket seating area.
2.  Metric conversation: Nominal Pipe size: in. x25=mm
3.All dimensions are in mm
 
 
AWWA blind Flanges thickness
MINIMUM THICKNESS*
Nominal Pipe size Class B Class D Class E Class F
4 15.88 15.875 28.58 28.58
6 17.48 17.5768 33.35 33.43
8 17.48 20.447 38.10 33.43
10 17.48 24.0538 39.70 38.96
12 19.10 28.194 44.45 43.94
14 21.21 28.6258 47.63 49.23
16 23.90 31.9532 50.80 54.33
18 25.73 33.6804 53.98 58.27
20 28.14 36.6268 60.33 60.99
24 32.39 42.0878 66.68 71.09
30 38.86 50.8762 73.03 86.84
36 46.58 60.1726 84.94 102.03
42 52.93 69.215 96.24 113.03
48 59.46 77.9018 107.85 126.77
54 66.90 87.1474 121.31  
60 73.46 95.8596 132.99  
66 79.73 104.9528 144.12  
72 86.33 113.6904 155.88  
 
Notes:
1. Mating flanges ID dimension are as shown in table through 20 in, OD and 1/8 in, over pipe OD using the follwing ODs for pipe 24 in. and larger ..            
2. All flanges are flat faced.
3.All dimensions are in mm
 
* There will may be typical error
 
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