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)

04BLIDAWW N/A 4 N/A 175 psi N/A 9.00 in N/A 0.63 in N/A 11 lb N/A 8 N/A 0.75 in N/A 7.50 in
05BLIDAWW N/A 5 N/A 175 psi N/A 10.00 in N/A 0.65 in N/A 14 lb N/A 8 N/A 0.88 in N/A 8.50 in
06BLIDAWW N/A 6 N/A 175 psi N/A 11.00 in N/A 0.69 in N/A 18 lb N/A 8 N/A 0.88 in N/A 9.50 in
08BLIDAWW N/A 8 N/A 175 psi N/A 13.50 in N/A 0.81 in N/A 32 lb N/A 8 N/A 0.88 in N/A 11.75 in
10BLIDAWW N/A 10 N/A 175 psi N/A 16.00 in N/A 0.95 in N/A 52 lb N/A 12 N/A 1.00 in N/A 14.25 in
12BLIDAWW N/A 12 N/A 175 psi N/A 19.00 in N/A 1.12 in N/A 87 lb N/A 12 N/A 1.00 in N/A 17.00 in
14BLIDAWW N/A 14 N/A 175 psi N/A 21.00 in N/A 1.13 in N/A 108 lb N/A 12 N/A 1.13 in N/A 18.75 in
16BLIDAWW N/A 16 N/A 175 psi N/A 23.50 in N/A 1.27 in N/A 150 lb N/A 16 N/A 1.13 in N/A 21.25 in
18BLIDAWW N/A 18 N/A 175 psi N/A 25.00 in N/A 1.33 in N/A 178 lb N/A 16 N/A 1.25 in N/A 22.75 in
20BLIDAWW N/A 20 N/A 175 psi N/A 27.50 in N/A 1.45 in N/A 234 lb N/A 20 N/A 1.25 in N/A 25.00 in
22BLIDAWW N/A 22 N/A 175 psi N/A 29.50 in N/A 1.57 in N/A 291 lb N/A 20 N/A 1.38 in N/A 27.25 in
24BLIDAWW N/A 24 N/A 175 psi N/A 32.00 in N/A 1.66 in N/A 365 lb N/A 20 N/A 1.38 in N/A 29.50 in
26BLIDAWW N/A 26 N/A 175 psi N/A 34.25 in N/A 1.79 in N/A 450 lb N/A 24 N/A 1.38 in N/A 31.75 in
28BLIDAWW N/A 28 N/A 175 psi N/A 36.50 in N/A 1.91 in N/A 545 lb N/A 28 N/A 1.38 in N/A 34.00 in
30BLIDAWW N/A 30 N/A 175 psi N/A 38.75 in N/A 2.01 in N/A 650 lb N/A 28 N/A 1.38 in N/A 36.00 in
32BLIDAWW N/A 32 N/A 175 psi N/A 41.75 in N/A 2.15 in N/A 800 lb N/A 28 N/A 1.63 in N/A 38.50 in
34BLIDAWW N/A 34 N/A 175 psi N/A 43.75 in N/A 2.25 in N/A 917 lb N/A 32 N/A 1.63 in N/A 40.50 in
36BLIDAWW N/A 36 N/A 175 psi N/A 46.00 in N/A 2.37 in N/A 1071 lb N/A 32 N/A 1.63 in N/A 42.75 in
38BLIDAWW N/A 38 N/A 175 psi N/A 48.75 in N/A 2.51 in N/A 1278 lb N/A 32 N/A 1.63 in N/A 45.25 in
40BLIDAWW N/A 40 N/A 175 psi N/A 50.75 in N/A 2.61 in N/A 1440 lb N/A 36 N/A 1.63 in N/A 47.25 in
42BLIDAWW N/A 42 N/A 175 psi N/A 53.00 in N/A 2.73 in N/A 1650 lb N/A 36 N/A 1.63 in N/A 49.50 in
44BLIDAWW N/A 44 N/A 175 psi N/A 55.25 in N/A 2.85 in N/A 1868 lb N/A 40 N/A 1.63 in N/A 51.75 in
46BLIDAWW N/A 46 N/A 175 psi N/A 57.25 in N/A 2.95 in N/A 2085 lb N/A 40 N/A 1.63 in N/A 53.75 in
48BLIDAWW N/A 48 N/A 175 psi N/A 59.50 in N/A 3.07 in N/A 2345 lb N/A 44 N/A 1.63 in N/A 56.00 in
50BLIDAWW N/A 50 N/A 175 psi N/A 61.75 in N/A 3.20 in N/A 2871 lb N/A 44 N/A 1.88 in N/A 58.25 in
Unit of Measure
1 2