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Welding Neck Flanges – Class 150

Welding Neck Flanges

Class 150

  Nominal size O C R X A Y Number of holes Diam. of holes Diam. of bolts Diam. of bolt circle Weight
in
mm
1/2″ 3.50 88.9 0.44 11.2 1.38 35.1 1.19 30.2 0.84 21.3 1.88 47.8 4 0.62 15.7 1/2 12.7 2.38 60.5 2
1
in
mm
3/4″ 3.88 98.6 0.50 12.7 1.69 42.9 1.50 38.1 1.05
26.7
2.06
52.3
4 0.62
15.7
1/2 12.7 2.75
69.9
2
1
in mm 1″ 4.25 108.0 0.56 14.2 2.00 50.8 1.94 49.3 1.32
33.5
2.19
55.6
4 0.62
15.7
1/2 12.7 3.12 79.2 3
1
in mm 1 1/4″ 4.62 117.3 0.62 15.7 2.50 63.5 2.31 58.7 1.66
42.2
2.25
57.2
4 0.62
15.7
1/2 12.7 3.50
88.9
3
1
in mm 1 1/2″ 5.00 127.0 0.69 17.5 2.88 73.2 2.56 65.0 1.90
48.3
2.44
62.0
4 0.62
15.7
1/2 12.7 3.88 98.6 4
2
in mm 2″ 6.00 152.4 0.75 19.1 3.62 91.9 3.06 77.7 2.38
60.5
2.50
63.5
4 0.75
19.1
5/8
15.9
4.75 120.7 6
3
in mm 3″ 7.50 190.5 0.94 23.9 5.00 127.0 4.25 108.0 3.50
88.9
2.75
69.9
4 0.75
19.1
5/8 15.9 6.00
152.4
10
5
in mm 3 1/2″ 8.50 215.9 0.94 23.9 5.50 139.7 4.81 122.2 4.00
101.6
2.81
71.4
8 0.75
19.1
5/8
15.9
7.00 177.8 12
5
in mm 4″ 9.00 228.6 0.94 23.9 6.19 157.2 5.31 134.9 4.50
114.3
3.00 76.2 8 0.03
0.76
7.50 190.5 3.12
79.25
15
7
in mm 5″ 10.00 254.0 0.94 23.9 7.31 185.7 6.44 163.6 5.56
141.2
3.50
88.9
8 0.88
22.4
3/4
19.1
8.50 215.9 19
9
in mm 6″ 11.00 279.4 1.00 25.4 8.50 215.9 7.56 192.0 6.63
168.4
3.50
88.9
8 0.88
22.4
3/4 19.1 9.50
241.3
24
11
in mm 8″ 13.50 342.9 1.12 28.4 10.62 269.7 9.69 246.1 8.63
219.2
4.00
101.6
8 0.88
22.4
3/4 19.1 11.75 298.5 39
18
in mm 10″ 16.00 406.4 1.19 30.2 12.75 323.9 12.00 304.8 10.75
273.1
4.00
101.6
12 1.00
25.4
7/8
22.2
14.25 362.0 52
24
in mm 12″ 19.00 482.6 1.25 31.8 15.00 381.0 14.38 365.3 12.75
323.9
4.50
114.3
12 1.00
25.4
7/8 22.2 17.00
431.8
80
36
in mm 14″ 21.00 533.4 1.38 35.1 16.25 412.8 15.75 400.1 14.00
355.6
5.00
127.0
12 1.12
28.4
1
25.4
18.75 476.3 110
50
in mm 16″ 23.50 596.9 1.44 36.6 18.50 469.9 18.00 457.2 16.00
406.4
5.00
127.0
16 1.12
28.4
1
25.4
21.25 539.8 140
64
in mm 18″ 25.00 635.0 1.56 39.6 21.00 533.4 19.88 505.0 18.00
457.2
5.50
139.7
16 1.25
31.8
1 1/8 28.6 22.75
577.9
150
68
in mm 20″ 27.50 698.5 1.69 42.9 23.00 584.2 22.00 558.8 20.00
508.0
5.69
144.5
20 1.25
31.8
1 1/8 28.6 25.00 635.0 180
82
in mm 24″ 32.00 812.8 1.88 47.8 27.25 692.2 26.12 663.4 24.00
609.6
6.00
152.4
20 1.38
35.1
1 1/4 31.8 29.50 749.3 260
118
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