• Home
  • Class 125SO Flanges

Class 125SO Flanges

Class 125 SO (275 psi*)
Same as AWWA Table 4 Class E

(Click any image above to enlarge it and lock it in place, then scroll to the bottom table for dimensions)
Drilling    
Nom SizeODDia at BaseBoreLTHBolt CircleBolt LengthHole Dia# of HolesWeight
A TEBC
490.9385.3124.571.3127.53.750.75813
5100.9386.4385.661.4388.540.875814
61117.5626.721.5629.540.875817
813.51.1259.6888.721.7511.754.50.875828
10161.1881210.881.93814.25511237
12191.2514.37512.882.18817511259
14211.37515.7514.192.2518.755.51.1251278
1623.51.4381816.192.521.255.751.12516101
18251.56219.87518.192.68822.7561.2516110
2027.51.6882220.192.875256.51.2520139
2229.51.8122422.193.12527.256.751.37520162
24321.87526.12524.193.2529.571.37520197
2634.25228.526.193.37531.757.251.37524235
2836.52.06230.7528.193.438347.51.37528269
3038.752.12532.7530.193.5367.751.37528303
3241.752.253532.193.62538.58.51.62528375
3443.752.3123734.193.68840.58.51.62532401
36462.37539.2536.193.7542.758.751.62532452
3848.752.37541.7538.193.7545.258.751.62532528
4050.752.543.7540.193.87547.2591.62536573
42532.6254642.19449.59.251.62536648
4455.252.6254844.19451.759.251.62540688
4657.252.6885046.194.06253.759.251.62540733
4859.52.7552.2548.194.125569.51.62544799
5061.752.7554.2550.194.12558.25101.87544827
52642.87556.552.194.2560.510.251.87544922
5466.25358.7554.194.37562.7510.51.875441024
60733.12565.2560.194.569.25111.875521253
66803.37571.566.194.8757611.51.875521623
7286.53.578.572.19582.511.751.875601922
78933.87584.578.195.37589132.125642279
8499.753.87590.584.195.37595.5132.125642586
90106.54.2596.7590.195.7510214.252.438683061
96113.254.25102.7596.195.75108.514.252.438683432

Dimensions are in inches. Weights are in pounds.

Notes: Commonly referred to as a class 150# in larger diameter. Can be furnished with a raised face. *Pressure ratings from AWWA table 4 Class E. Pressure rating at atmopheric temperature is 275 psi. These flanges have the same OD and drilling as ANSI/ASME B16.1 class 125 cast-iron flanges. In sizes 24 in. and smaller, they also match ANSI/ASME B16.5 150-psi standard for steel flanges.

Class 125 SO Flange PDF (for printing).