• 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)

04BLIBAWW N/A 4 N/A 86 psi N/A 9.00 N/A 0.625 N/A 14 N/A 8 N/A 0.750 N/A 7.50
05BLIBAWW N/A 5 N/A 86 psi N/A 10.00 N/A 0.625 N/A 17 N/A 8 N/A 0.875 N/A 8.50
06BLIBAWW N/A 6 N/A 86 psi N/A 11.00 N/A 0.688 N/A 22 N/A 8 N/A 0.875 N/A 9.50
08BLIBAWW N/A 8 N/A 86 psi N/A 13.50 N/A 0.688 N/A 33 N/A 8 N/A 0.875 N/A 11.75
10BLIBAWW N/A 10 N/A 86 psi N/A 16.00 N/A 0.688 N/A 46 N/A 12 N/A 1.000 N/A 14.25
12BLIBAWW N/A 12 N/A 86 psi N/A 19.00 N/A 0.719 N/A 68 N/A 12 N/A 1.000 N/A 17.00
14BLIBAWW N/A 14 N/A 86 psi N/A 21.00 N/A 0.791 N/A 90 N/A 12 N/A 1.125 N/A 18.75
16BLIBAWW N/A 16 N/A 86 psi N/A 23.50 N/A 0.892 N/A 125 N/A 16 N/A 1.125 N/A 21.25
18BLIBAWW N/A 18 N/A 86 psi N/A 25.00 N/A 0.950 N/A 149 N/A 16 N/A 1.250 N/A 22.75
20BLIBAWW N/A 20 N/A 86 psi N/A 27.50 N/A 1.040 N/A 207 N/A 20 N/A 1.250 N/A 25.00
22BLIBAWW N/A 22 N/A 86 psi N/A 29.50 N/A 1.132 N/A 255 N/A 20 N/A 1.375 N/A 27.25
24BLIBAWW N/A 24 N/A 86 psi N/A 32.00 N/A 1.216 N/A 320 N/A 20 N/A 1.375 N/A 29.50
26BLIBAWW N/A 26 N/A 86 psi N/A 34.25 N/A 1.307 N/A 390 N/A 24 N/A 1.375 N/A 31.75
28BLIBAWW N/A 28 N/A 86 psi N/A 36.50 N/A 1.398 N/A 470 N/A 28 N/A 1.375 N/A 34.00
30BLIBAWW N/A 30 N/A 86 psi N/A 38.75 N/A 1.477 N/A 546 N/A 28 N/A 1.375 N/A 36.00
32BLIBAWW N/A 32 N/A 86 psi N/A 41.75 N/A 1.581 N/A 686 N/A 28 N/A 1.625 N/A 38.50
34BLIBAWW N/A 34 N/A 86 psi N/A 43.75 N/A 1.661 N/A 787 N/A 32 N/A 1.625 N/A 40.50
36BLIBAWW N/A 36 N/A 86 psi N/A 46.00 N/A 1.751 N/A 913 N/A 32 N/A 1.625 N/A 42.75
38BLIBAWW N/A 38 N/A 86 psi N/A 48.75 N/A 1.853 N/A 1079 N/A 32 N/A 1.625 N/A 45.25
40BLIBAWW N/A 40 N/A 86 psi N/A 50.75 N/A 1.933 N/A 1215 N/A 36 N/A 1.625 N/A 47.25
42BLIBAWW N/A 42 N/A 86 psi N/A 53.00 N/A 2.023 N/A 1382 N/A 36 N/A 1.625 N/A 49.50
44BLIBAWW N/A 44 N/A 86 psi N/A 55.25 N/A 2.114 N/A 1563 N/A 40 N/A 1.625 N/A 51.75
46BLIBAWW N/A 46 N/A 86 psi N/A 57.25 N/A 2.194 N/A 1737 N/A 40 N/A 1.625 N/A 53.75
48BLIBAWW N/A 48 N/A 86 psi N/A 59.50 N/A 2.285 N/A 1948 N/A 44 N/A 1.625 N/A 56.00
50BLIBAWW N/A 50 N/A 86 psi N/A 61.75 N/A 2.377 N/A 2176 N/A 44 N/A 1.875 N/A 58.25
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