ASME/ANSI B16.5 Class 300 SO

Nominal Pipe Size Outside Diameter of Flange Diameter of Raised Face Thickness of Flanges Min. Diameter of Hub Length Through Hub Bore Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approxi-mate Weight kgs
NPS O R tf X Y B W I n
1/2 95 34.9 12.7 38 21 22.2 66.7 15.9 4 0.65
3/4 115 42.9 14.3 48 24 27.7 82.6 19.1 4 1.08
1 125 50.8 15.9 54 25 34.5 88.9 19.1 4 1.39
1 1/4 135 63.5 17.5 64 25 43.2 98.4 19.1 4 1.74
1 1/2 155 73.0 19.1 70 29 49.5 114.3 22.2 4 2.49
2 165 92.1 20.7 84 32 61.9 127.0 19.1 8 2.90
2 1/2 190 104.8 23.9 100 37 74.6 149.2 22.2 8 4.35
3 210 127.0 27.0 117 41 90.7 168.3 22.2 8 5.89
3 1/2 230 139.7 28.6 133 43 103.4 184.2 22.2 8 7.48
4 255 157.2 30.2 146 46 116.1 200.0 22.2 8 9.77
5 280 185.7 33.4 178 49 143.8 235.0 22.2 8 12.31
6 320 215.9 35.0 206 51 170.7 269.9 22.2 12 16.07
8 380 269.9 39.7 260 60 221.5 330.2 25.4 12 24.07
10 445 323.8 46.1 321 65 276.2 387.4 28.6 16 34.38
12 520 381.0 49.3 375 71 327.0 450.8 31.8 16 49.80
14 585 412.8 52.4 425 75 359.2 514.4 31.8 20 70.12
16 650 469.9 55.6 483 81 410.5 571.5 34.9 20 89.56
18 710 533.4 58.8 533 87 461.8 628.6 34.9 24 108.10
20 775 584.2 62.0 587 94 513.1 685.8 34.9 24 134.87
24 915 692.2 68.3 702 105 616.0 812.8 41.3 24 202.58

Note:2 mm raised face regularly furnished on Classes 150 and 300 unless otherwise ordered.

Nominal Pipe Size Outside Diameter of Flange Diameter of Raised Face Thickness of Flanges Min. Diameter of Hub Length Through Hub Bore Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approximate Weight kgs
NPS O R tf X Y B W I n
1/2 90 34.9 9.6 30 14 22.2 60.3 15.9 4 0.41
3/4 100 42.9 11.2 38 14 27.7 69.9 15.9 4 0.59
1 110 50.8 12.7 49 16 34.5 79.4 15.9 4 0.82
1 1/4 115 63.5 14.3 59 19 43.2 88.9 15.9 4 0.99
1 1/2 125 73.0 15.9 65 21 49.5 98.4 15.9 4 1.28
2 150 92.1 17.5 78 24 61.9 120.7 19.1 4 2.01
2 1/2 180 104.8 20.7 90 27 74.6 139.7 19.1 4 3.41
3 190 127.0 22.3 108 29 90.7 152.4 19.1 4 3.88
3 1/2 215 139.7 22.3 122 30 103.4 177.8 19.1 8 4.80
4 230 157.2 22.3 135 32 116.1 190.5 19.1 8 5.45
5 255 185.7 22.3 164 35 143.8 215.9 22.2 8 6.22
6 280 215.9 23.9 192 38 170.7 241.3 22.2 8 7.57
8 345 269.9 27.0 246 43 221.5 298.5 22.2 8 12.42
10 405 323.8 28.6 305 48 276.2 362.0 25.4 12 16.47
12 485 381.0 30.2 365 54 327.0 431.8 25.4 12 26.80
14 535 412.8 33.4 400 56 359.2 476.3 28.6 12 35.21
16 595 469.9 35.0 457 62 410.5 539.8 28.6 16 44.61
18 635 533.4 38.1 505 67 461.8 577.9 31.8 16 49.19
20 700 584.2 41.3 559 71 513.1 635.0 31.8 20 62.62
24 815 692.2 46.1 663 81 616.0 749.3 34.9 20 88.23

Standards, Dimensions & Weight of Slip on flanges

The Slip-on flange has a low hub because the pipe slips into the flange prior to welding.

Details of Slip On flange
1. Slip On flange 2. Filled weld outside 3. Filled weld inside 4. Pipe

Flanges specification, Standard and identification

Below you will find a short description and definition of each type, completed with an detailed image.