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Class 4E AWWA Standard Steel-Hub Flange

Table 4 Class E

AWWA STANDARD STEEL-HUB FLANGE (275 PSI*)

Drilling  
Nom SizeODThicknessOverall ThicknessDia at BaseBoreBolt CircleHole Dia# of HolesWeight
ALEBC
490.9381.3125.3124.577.50.75813
5100.9381.4386.4385.668.50.875814
61111.5627.5626.729.50.875817
813.51.1251.759.6888.7211.750.875828
10161.1881.9381210.8814.2511237
12191.252.18814.37512.881711259
14211.3752.2515.7514.1918.751.1251278
1623.51.4382.51816.1921.251.12516101
18251.5622.68819.87518.1922.751.2516110
2027.51.6882.8752220.19251.2520139
2229.51.8123.1252422.1927.251.37520162
24321.8753.2526.12524.1929.51.37520197
2634.2523.37528.526.1931.751.37524235
2836.52.0623.43830.7528.19341.37528269
3038.752.1253.532.7530.19361.37528303
3241.752.253.6253532.1938.51.62528375
3443.752.3123.6883734.1940.51.62532401
36462.3753.7539.2536.1942.751.62532452
3848.752.3753.7541.7538.1945.251.62532528
4050.752.53.87543.7540.1947.251.62536573
42532.62544642.1949.51.62536648
4455.252.62544844.1951.751.62540688
4657.252.6884.0625046.1953.751.62540733
4859.52.754.12552.2548.19561.62544799
5061.752.754.12554.2550.1958.251.87544827
52642.8754.2556.552.1960.51.87544922
5466.2534.37558.7554.1962.751.875441024
60733.1254.565.2560.1969.251.875521253
66803.3754.87571.566.19761.875521623
7286.53.5578.572.1982.51.875601922
78933.8755.37584.578.19892.125642279
8499.753.8755.37590.584.1995.52.125642586
90106.54.255.7596.7590.191022.438683061
96113.254.255.75102.7596.19108.52.438683432

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 rating at atmospheric temperature is 275 psi. These flanges have the same OD and drilling as ANSI/ASME B16.1 class 125 cast-iron flanges. In sizes 24in. and smaller, they also match ANSI/ASME B16.5 class 150 standard for steel flanges. The thickness of a class 150 flange from which the raised face has been removed shall be no less than dimension T minus 0.06 in.

Class 4E AWWA Standard Steel-Hub Flange PDF (for printing).