• Table 7 AWWA Blind Flanges
  • All dimensions are in inches.
  • Blind flanges shall be machined with center island to match the mating flange.
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Item #

Nominal Pipe Size

Working Pressure

Outside Diameter (A)

Minimum Thickness (T)

Approximate Weight (lbs)

Number of Bolt Holes

Diameter of Bolt Holes

Diameter of Bolt Circle (C)

04BLIDAWW N/A 4 N/A 175 psi N/A 9.00 N/A 0.625 N/A 14 N/A 8 N/A 0.750 N/A 7.50
05BLIDAWW N/A 5 N/A 175 psi N/A 10.00 N/A 0.650 N/A 17 N/A 8 N/A 0.875 N/A 8.50
06BLIDAWW N/A 6 N/A 175 psi N/A 11.00 N/A 0.693 N/A 22 N/A 8 N/A 0.875 N/A 9.50
08BLIDAWW N/A 8 N/A 175 psi N/A 13.50 N/A 0.812 N/A 38 N/A 8 N/A 0.875 N/A 11.75
10BLIDAWW N/A 10 N/A 175 psi N/A 16.00 N/A 0.953 N/A 61 N/A 12 N/A 1.000 N/A 14.25
12BLIDAWW N/A 12 N/A 150 psi N/A 19.00 N/A 1.117 N/A 100 N/A 12 N/A 1.000 N/A 17.00
14BLIDAWW N/A 14 N/A 150 psi N/A 21.00 N/A 1.133 N/A 123 N/A 12 N/A 1.125 N/A 18.75
16BLIDAWW N/A 16 N/A 150 psi N/A 23.50 N/A 1.265 N/A 171 N/A 16 N/A 1.125 N/A 21.25
18BLIDAWW N/A 18 N/A 150 psi N/A 25.00 N/A 1.331 N/A 202 N/A 16 N/A 1.250 N/A 22.75
20BLIDAWW N/A 20 N/A 150 psi N/A 27.50 N/A 1.448 N/A 275 N/A 20 N/A 1.250 N/A 25.00
22BLIDAWW N/A 22 N/A 150 psi N/A 29.50 N/A 1.568 N/A 340 N/A 20 N/A 1.375 N/A 27.25
24BLIDAWW N/A 24 N/A 150 psi N/A 32.00 N/A 1.661 N/A 421 N/A 20 N/A 1.375 N/A 29.50
26BLIDAWW N/A 26 N/A 150 psi N/A 34.25 N/A 1.786 N/A 515 N/A 24 N/A 1.375 N/A 31.75
28BLIDAWW N/A 28 N/A 150 psi N/A 36.50 N/A 1.906 N/A 621 N/A 28 N/A 1.375 N/A 34.00
30BLIDAWW N/A 30 N/A 150 psi N/A 38.75 N/A 2.008 N/A 734 N/A 28 N/A 1.375 N/A 36.00
32BLIDAWW N/A 32 N/A 150 psi N/A 41.75 N/A 2.150 N/A 907 N/A 28 N/A 1.625 N/A 38.50
34BLIDAWW N/A 34 N/A 150 psi N/A 43.75 N/A 2.250 N/A 1039 N/A 32 N/A 1.625 N/A 40.50
36BLIDAWW N/A 36 N/A 150 psi N/A 46.00 N/A 2.370 N/A 1204 N/A 32 N/A 1.625 N/A 42.75
38BLIDAWW N/A 38 N/A 150 psi N/A 48.75 N/A 2.506 N/A 1424 N/A 32 N/A 1.625 N/A 45.25
40BLIDAWW N/A 40 N/A 150 psi N/A 50.75 N/A 2.609 N/A 1603 N/A 36 N/A 1.625 N/A 47.25
42BLIDAWW N/A 42 N/A 150 psi N/A 53.00 N/A 2.729 N/A 1823 N/A 36 N/A 1.625 N/A 49.50
44BLIDAWW N/A 44 N/A 150 psi N/A 55.25 N/A 2.849 N/A 2062 N/A 40 N/A 1.625 N/A 51.75
46BLIDAWW N/A 46 N/A 150 psi N/A 57.25 N/A 2.952 N/A 2290 N/A 40 N/A 1.625 N/A 53.75
48BLIDAWW N/A 48 N/A 150 psi N/A 59.50 N/A 3.072 N/A 2568 N/A 44 N/A 1.625 N/A 56.00
50BLIDAWW N/A 50 N/A 150 psi N/A 61.75 N/A 3.196 N/A 2871 N/A 44 N/A 1.875 N/A 58.25
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