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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)

52BLIDAWW N/A 52 N/A 175 psi N/A 64.00 in N/A 3.32 in N/A 3192 lb N/A 44 N/A 1.88 in N/A 60.50 in
54BLIDAWW N/A 54 N/A 175 psi N/A 66.25 in N/A 3.44 in N/A 3240 lb N/A 44 N/A 1.88 in N/A 62.75 in
60BLIDAWW N/A 60 N/A 175 psi N/A 73.00 in N/A 3.78 in N/A 4330 lb N/A 52 N/A 1.88 in N/A 69.25 in
66BLIDAWW N/A 66 N/A 175 psi N/A 80.00 in N/A 4.14 in N/A 5725 lb N/A 52 N/A 1.88 in N/A 76.00 in
72BLIDAWW N/A 72 N/A 175 psi N/A 86.50 in N/A 4.48 in N/A 7250 lb N/A 60 N/A 1.88 in N/A 82.50 in
Unit of Measure
1 2