Class 125WN Flanges

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Class 125WN Flanges (Class 125 Weld Neck Flanges)

Class 125 Weld Neck Flange Engineering Drawing
DRILLING
NOM SIZE OD THICKNESS OD OF RF DIA AT BASE BORE DIA BEVEL LTH BOLT CIRCLE BOLT LENGTH HOLE DIA # OF HOLES WEIGHT
O C R X B A Y
6 11 1 8.5 7.56 To Be Specified By Purchaser 6.63 3.5 9.5 4 0.88 8 24
8 13.5 1.13 10.63 9.69 8.63 4 11.75 4.5 0.88 8 39
10 16 1.19 12.75 12 10.75 4 14.25 5 1 12 52
12 19 1.25 15 14.38 12.75 4.5 17 5 1 12 80
14 21 1.38 16.25 15.75 14 5 18.75 5.5 1.13 12 110
16 23.5 1.44 18.5 18 16 5 21.25 5.75 1.13 16 140
18 25 1.56 21 19.88 18 5.5 22.75 6 1.25 16 150
20 27.5 1.69 23 22 20 5.69 25 6.5 1.25 20 180
22 29.5 1.81 25.25 24.25 22 5.88 27.25 6.75 1.38 20 225
24 32 1.88 27.25 26.13 24 6 29.5 7 1.38 20 255
26 34.25 2 29.5 28.5 26 5 31.75 7.25 1.38 24 265
28 36.5 2.06 31.5 30.75 28 5.06 34 7.5 1.38 28 295
30 38.75 2.13 33.75 32.75 30 5.13 36 7.75 1.38 28 340
32 41.75 2.25 36 35 32 5.25 38.5 8.5 1.63 28 410
34 43.75 2.31 38 37 34 5.31 40.5 8.5 1.63 32 440
36 46 2.38 40.25 39.25 36 5.38 42.75 8.75 1.63 32 495
38 48.75 2.38 42.25 41.75 38 5.38 45.25 8.75 1.63 32 570
40 50.75 2.5 44.25 43.75 40 5.5 47.25 9 1.63 36 620
42 53 2.63 47 46 42 5.63 49.5 9.25 1.63 36 710
44 55.25 2.63 49 48 44 5.63 51.75 9.25 1.63 40 750
46 57.25 2.69 51 50 46 5.68 53.75 9.25 1.63 40 800
48 59.5 2.75 53.5 52.25 48 5.75 56 9.5 1.63 44 870
50 61.75 2.75 55.5 54.25 50 5.75 58.25 10 1.88 44 900
52 64 2.88 57.5 56.5 52 5.88 60.5 10.25 1.88 44 1000
54 66.25 3 59.75 58.75 54 6 62.75 10.5 1.88 44 1100
60 73 3.13 66 65.25 60 6.13 69.25 11 1.88 52 1350
66 80 3.38 – 71.5 66 6.38 76 11.5 1.88 52 1775
72 86.5 3.5 – 78.5 72 6.5 82.5 11.75 1.88 60 2100
84 99.75 3.88 – 90.5 84 6.88 95.5 13 2.13 64 2825
96 113.25 4.25 – 102.75 96 7.25 108.5 14.25 2.44 68 3800

Dimensions are in inches & weights 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.

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