Technical-Info

Flanges Dimensions

Dimensions for Class 150 Flanges
Pipe Size (inches) O Q R X No. of Holes Dia. of Bolt Holes Bolt Circle Dia YY H J Y B R YY BB Z
1/2 88.9 11.2 35.1 30.2 4 15.7 60.5 47.8 21.3 15.7 15.7 22.4 3.0 15.7 22.9 9.7
3/4 98.6 12.7 42.9 38.1 4 15.7 69.9 52.3 26.7 20.8 15.7 27.7 3.0 15.7 28.2 11.2
1 108.0 14.2 50.8 49.3 4 15.7 79.2 55.6 33.5 26.7 17.5 34.5 3.0 17.5 35.1 12.7
1 1/4 117.3 15.7 63.5 58.7 4 15.7 88.9 57.2 42.2 35.1 20.6 43.2 4.8 20.6 43.7 14.2
1 1/2 127.0 17.3 73.2 65.0 4 15.7 98.6 62.0 48.3 40.9 22.4 49.5 6.4 22.4 50.0 15.7
2 152.4 19.1 91.9 77.7 4 19.1 120.7 63.5 60.5 52.6 25.4 62.0 7.9 25.4 62.5 17.5
21/2 177.8 22.4 104.6 90.4 4 19.1 139.7 69.9 73.2 62.7 28.4 74.7 7.9 28.4 75.4 19.1
3 190.5 23.9 127.0 108.0 4 19.1 152.4 69.9 88.9 78.0 30.2 90.7 9.7 30.2 91.4 20.6
31/2 215.9 23.9 139.7 122.2 8 19.1 177.8 71.4 101.6 90.2 31.8 1033.8 9.7 31.8 104.1  
4 228.6 23.9 157.2 134.9 8 19.1 190.5 76.2 114.3 102.4 33.3 116.1 11.2 33.3 116.8  
5 254.0 23.9 185.7 163.6 8 22.4 215.9 88.9 141.2 128.3 36.6 143.8 11.2 36.6 144.5  
6 279.4 25.4 215.9 192.0 8 22.4 241.3 88.9 168.4 154.2 39.6 170.7 12.7 39.6 171.5  
8 342.9 28.4 269.7 246.1 8 22.4 298.5 101.6 219.2 202.7 44.5 221.5 12.7 44.5 222.3  
10 406.4 30.2 323.9 304.8 12 25.4 362.0 101.6 273.1 254.5 49.3 276.4 12.7 49.3 277.4  
12 482.6 31.8 381.0 365.3 12 25.4 431.8 114.3 323.9 304.8 55.6 327.2 12.7 55.6 328.2  
14 533.4 35.1 412.8 400.1 12 28.4 476.3 127.0 355.6 To Be Specified by the Purchaser 57.2 359.2 12.7 79.2 360.2  
16 596.9 36.6 469.9 457.2 16 28.4 539.8 127.0 406.4 63.5 410.5 12.7 87.4 411.2  
18 635.0 39.6 533.4 505.0 16 31.8 577.9 139.7 457.2 68.3 461.8 12.7 96.8 462.3  
20 698.5 42.9 584.2 558.8 20 31.8 635.0 144.5 508.0 73.2 513.1 12.7 103.1 514.4  
24 812.8 47.8 692.2 663.4 20 35.1 749.3 152.4 609.6 82.6 616.0 12.7 111.3 616.0