Class 125LW Flange
Class 125LW Flanges
Class 125LW (175-150 psi*)
Same as AWWA Class D Hub
Nom Size           Drilling  
OD  Thickness Dia at Base Bore LTH Bolt Circle Bolt Length Hole Dia # of Holes Weight
A T  E B L C        
4 9.00 0.500 5.312 4.57 0.875 7.50 2.75 0.750 8 7
5 10.00 0.562 6.438 5.66 1.250 8.50 3.25 0.875 8 9
6 11.00 0.562 7.562 6.72 1.250 9.50 3.25 0.875 8 11
8 13.50 0.562 9.688 8.72 1.250 11.75 3.25 0.875 8 15
10 16.00 0.688 12.000 10.88 1.250 14.25 3.75 1.000 12 22
12 19.00 0.688 14.375 12.88 1.250 17.00 3.75 1.000 12 33
14 21.00 0.750 15.750 14.19 1.250 18.75 4.00 1.125 12 43
16 23.50 0.750 18.000 16.19 1.250 21.25 4.00 1.125 16 52
18 25.00 0.750 19.875 18.19 1.250 22.75 4.25 1.250 16 52
20 27.50 0.750 22.000 20.19 1.250 25.00 4.25 1.250 20 61
22 29.50 1.000 24.000 22.19 1.750 27.25 5.00 1.375 20 92
24 32.00 1.000 26.125 24.19 1.750 29.50 5.00 1.375 20 105
26 34.25 1.000 28.500 26.19 1.750 31.75 5.00 1.375 24 119
28 36.50 1.000 30.500 28.19 1.750 34.00 5.00 1.375 28 130
30 38.75 1.000 32.500 30.19 1.750 36.00 5.00 1.375 28 144
32 41.75 1.125 34.750 32.19 1.750 38.50 6.00 1.625 28 182
34 43.75 1.125 36.750 34.19 1.750 40.50 6.00 1.625 32 191
36 46.00 1.125 38.750 36.19 1.750 42.75 6.00 1.625 32 207
38 48.75 1.125 40.750 38.19 1.750 45.25 6.00 1.625 32 237
40 50.75 1.125 43.000 40.19 1.750 47.25 6.00 1.625 36 249
42 53.00 1.250 45.000 42.19 1.750 49.50 6.25 1.625 36 287
44 55.25 1.250 47.000 44.19 2.250 51.75 6.25 1.625 40 334
46 57.25 1.250 49.000 46.19 2.250 53.75 6.25 1.625 40 348
48 59.50 1.375 51.000 48.19 2.500 56.00 6.50 1.625 44 407
50 61.75 1.375 53.000 50.19 2.500 58.25 7.00 1.875 44 421
52 64.00 1.375 55.000 52.19 2.500 60.50 7.00 1.875 44 448
54 66.25 1.375 57.000 54.19 2.500 62.75 7.00 1.875 44 475
60 73.00 1.500 63.000 60.19 2.750 69.25 7.25 1.875 52 605
66 80.00 1.500 69.000 66.19 2.750 76.00 7.25 1.875 52 718
72 86.50 1.500 75.000 72.19 2.750 82.50 7.25 1.875 60 803
78 93.00 1.750 81.250 78.19 3.000 89.00 8.25 2.125 64 1010
84 99.75 1.750 87.500 84.19 3.000 95.50 8.25 2.125 64 1160
90 106.50 2.000 93.750 90.19 3.250 102.00 9.50 2.438 68 1430
96 113.25 2.000 100.000 96.19 3.250 108.50 9.50 2.438 68 1618
Dimensions are in inches.  Weights are in pounds.
Notes:  Hub flanges are to be used on pipe that has an OD equal to the nominal pipe size in the first column.    *Pressure Ratings are from AWWA Table 3 Class D.  Pressure rating at atmospheric temperature: sizes 4-12 in. inclusive, 175 psi; sizes larger than 12 in., 150 psi.  These flanges have the same diameter and drilling as ANSI/ASME B16.1 class 125 cast-iron flanges.  In sizes 24in. and smaller they also match up to ANSI/ASME B16.5 150-psi standard for steel flanges.

Class 125LW Flange PDF (for printing).