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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)

52BLIEAWW N/A 52 N/A 275 psi N/A 64.00 in N/A 4.49 in N/A 4262 lb N/A 44 N/A 1.88 in N/A 60.50 in
54BLIEAWW N/A 54 N/A 275 psi N/A 66.25 in N/A 4.65 in N/A 4725 lb N/A 44 N/A 1.88 in N/A 62.75 in
60BLIEAWW N/A 60 N/A 275 psi N/A 73.00 in N/A 5.12 in N/A 6288 lb N/A 52 N/A 1.88 in N/A 69.25 in
66BLIEAWW N/A 66 N/A 275 psi N/A 80.00 in N/A 5.60 in N/A 8243 lb N/A 52 N/A 1.88 in N/A 76.00 in
72BLIEAWW N/A 72 N/A 275 psi N/A 86.50 in N/A 6.07 in N/A 10411 lb N/A 60 N/A 1.88 in N/A 82.50 in
Unit of Measure
1 2