AWWA C228-08 Stainless-Steel Blind Flanges Add Flanges

Classes SA, SB, SD, SE, SF

AWWA C228 SS Blinds
Nominal Size Class SA 50 psi Class SB 86 psi Class SD 150 psi Class SE 275 psi Class SF 300 psi
2 0.50 NA NA NA NA
212 0.50 NA NA NA NA
3 0.50 NA NA NA NA
4 0.50 0.625 0.625 1.125 1.13
5 0.50 0.625 0.65 1.188 1.21
6 0.50 0.688 0.693 1.313 1.31
8 0.50 0.688 0.8125 1.5 1.31
10 Use class SB 0.688 0.953 1.563 1.5
12 Use class SB 0.719 1.117 1.75 1.63
14 Use class SB 0.791 1.133 1.875 1.94
16 Use class SB 0.892 1.265 2 2.14
18 Use class SB 0.95 1.331 2.125 2.25
20 Use class SB 1.04 1.448 2.375 2.33
22 Use class SB 1.132 1.568 2.5 2.5
24 Use class SB 1.216 1.661 2.625 2.69
26 Use class SB 1.307 1.786 2.75 3
28 Use class SB 1.398 1.906 2.75 3.13
30 Use class SB 1.477 2.008 2.875 3.166
32 Use class SB 1.581 2.15 3 3.332
34 Use class SB 1.661 2.252 3.05 3.475
36 Use class SB 1.751 2.37 3.209 3.671
38 Use class SB 1.853 2.506 3.394 3.815
40 Use class SB 1.933 2.609 3.533 3.982
42 Use class SB 2.023 2.729 3.695 4.171
44 Use class SB 2.114 2.849 3.857 4.338
46 Use class SB 2.194 2.952 3.997 4.505
48 Use class SB 2.285 3.072 4.159 4.781
50 Use class SB 2.377 3.196 4.327 -
52 Use class SB 2.468 3.315 4.489 -
54 Use class SB 2.559 3.435 4.651 -
60 Use class SB 2.82 3.779 5.116 -
66 Use class SB 3.092 4.136 5.601 -
72 Use class SB 3.353 4.48 6.066 -

Notes

Dimensions are in inches
OD and Drilling are same as Slip On Flanges of Same Class; Dimensions Shown are Thicknesses