Coastal Flange
Coastal Flange
11906 FM 529
Jersey Village, TX 77041
Phone: 800.643.9063
Fax: 713.937.3471
Email: sales@coastalflange.com
Website: www.coastalflange.com
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  • All dimensions are in inches.
  • Blind flanges shall be machined with center island to match the mating flange.

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Table 7 AWWA Blind Flanges
Unit of Measure
1 2 

Item #

Nominal Pipe Size

Working Pressure

Outside Diameter (A)

Minimum Thickness (T)

Approximate Weight

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 in N/A 0.63 in N/A 5 lb N/A 8 N/A 0.75 in N/A 7.50 in
05BLIBAWW N/A 5 N/A 86 psi N/A 10.00 in N/A 0.63 in N/A 7 lb N/A 8 N/A 0.88 in N/A 8.50 in
06BLIBAWW N/A 6 N/A 86 psi N/A 11.00 in N/A 0.69 in N/A 8 lb N/A 8 N/A 0.88 in N/A 9.50 in
08BLIBAWW N/A 8 N/A 86 psi N/A 13.50 in N/A 0.69 in N/A 11 lb N/A 8 N/A 0.88 in N/A 11.75 in
10BLIBAWW N/A 10 N/A 86 psi N/A 16.00 in N/A 0.69 in N/A 52 lb N/A 12 N/A 1.00 in N/A 14.25 in
12BLIBAWW N/A 12 N/A 86 psi N/A 19.00 in N/A 0.72 in N/A 68 lb N/A 12 N/A 1.00 in N/A 17.00 in
14BLIBAWW N/A 14 N/A 86 psi N/A 21.00 in N/A 0.79 in N/A 90 lb N/A 12 N/A 1.13 in N/A 18.75 in
16BLIBAWW N/A 16 N/A 86 psi N/A 23.50 in N/A 0.89 in N/A 125 lb N/A 16 N/A 1.13 in N/A 21.25 in
18BLIBAWW N/A 18 N/A 86 psi N/A 25.00 in N/A 0.95 in N/A 149 lb N/A 16 N/A 1.25 in N/A 22.75 in
20BLIBAWW N/A 20 N/A 86 psi N/A 27.50 in N/A 1.04 in N/A 207 lb N/A 20 N/A 1.25 in N/A 25.00 in
22BLIBAWW N/A 22 N/A 86 psi N/A 29.50 in N/A 1.13 in N/A 255 lb N/A 20 N/A 1.38 in N/A 27.25 in
24BLIBAWW N/A 24 N/A 86 psi N/A 32.00 in N/A 1.22 in N/A 320 lb N/A 20 N/A 1.38 in N/A 29.50 in
26BLIBAWW N/A 26 N/A 86 psi N/A 34.25 in N/A 1.31 in N/A 390 lb N/A 24 N/A 1.38 in N/A 31.75 in
28BLIBAWW N/A 28 N/A 86 psi N/A 36.50 in N/A 1.40 in N/A 470 lb N/A 28 N/A 1.38 in N/A 34.00 in
30BLIBAWW N/A 30 N/A 86 psi N/A 38.75 in N/A 1.48 in N/A 546 lb N/A 28 N/A 1.38 in N/A 36.00 in
32BLIBAWW N/A 32 N/A 86 psi N/A 41.75 in N/A 1.58 in N/A 686 lb N/A 28 N/A 1.63 in N/A 38.50 in
34BLIBAWW N/A 34 N/A 86 psi N/A 43.75 in N/A 1.66 in N/A 787 lb N/A 32 N/A 1.63 in N/A 40.50 in
36BLIBAWW N/A 36 N/A 86 psi N/A 46.00 in N/A 1.75 in N/A 913 lb N/A 32 N/A 1.63 in N/A 42.75 in
38BLIBAWW N/A 38 N/A 86 psi N/A 48.75 in N/A 1.85 in N/A 1079 lb N/A 32 N/A 1.63 in N/A 45.25 in
40BLIBAWW N/A 40 N/A 86 psi N/A 50.75 in N/A 1.93 in N/A 1215 lb N/A 36 N/A 1.63 in N/A 47.25 in
42BLIBAWW N/A 42 N/A 86 psi N/A 53.00 in N/A 2.02 in N/A 1382 lb N/A 36 N/A 1.63 in N/A 49.50 in
44BLIBAWW N/A 44 N/A 86 psi N/A 55.25 in N/A 2.11 in N/A 1563 lb N/A 40 N/A 1.63 in N/A 51.75 in
46BLIBAWW N/A 46 N/A 86 psi N/A 57.25 in N/A 2.19 in N/A 1737 lb N/A 40 N/A 1.63 in N/A 53.75 in
48BLIBAWW N/A 48 N/A 86 psi N/A 59.50 in N/A 2.29 in N/A 1948 lb N/A 44 N/A 1.63 in N/A 56.00 in
50BLIBAWW N/A 50 N/A 86 psi N/A 61.75 in N/A 2.38 in N/A 2176 lb N/A 44 N/A 1.88 in N/A 58.25 in
Unit of Measure
1 2