class 900 flange dimensions

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by Creative Piping
ANSI B16.5 Class 900 Flanges Dimensions
ANSI B 16.5 Class 900 flange dimensions in mm
Nominal
Pipe Size		 Flange
Dia
‘O’		 Dia of
Bolt Circle
‘A’		 Dia of Bolt Holes
‘D’		 No. of
Holes		 Thickness of Flange
‘C’		 Diameter at Weld Bevel Dia of Hub
‘E’		 Length Through Hub Bore ‘B’ Dia of
R/F
R		 Depth of
Socket
F		 Length
of
Threading
S/O & S/W
Y		 W/N
Y		 L/J
Y		 S/O & S/W
B		 L/J
B
1/2” 15 95.2 66.7 15.9 4 14.3 21.3 38.1 22.2 52.4 22.2 22.3 22.9 34.9 9.5 15.9
3/4” 20 117.5 82.5 19.0 4 15.9 26.7 47.6 25.4 57.1 25.4 27.7 28.2 42.9 11.1 15.9
1” 25 123.8 88.9 19.0 4 17.5 33.5 54.0 27.0 61.9 27.0 34.5 35.0 50.8 12.7 17.5
1 ¼” 32 133.3 98.4 19.0 4 20.6 42.2 63.5 28.6 66.7 28.6 43.2 43.7 63.5 14.3 20.6
1 ½” 40 155.6 114.3 22.2 4 22.2 48.3 69.8 31.7 69.8 31.7 49.5 50.0 73.0 15.9 22.2
2” 50 165.1 127.0 19.0 8 25.4 60.4 84.1 36.5 73.0 36.5 62.0 62.5 92.1 17.5 25.4
2 ½” 65 190.5 149.2 22.2 8 28.6 73.1 100.0 41.3 79.4 41.3 74.7 75.4 104.8 19.0 28.6
3” 80 209.5 168.3 22.2 8 31.8 88.9 117.5 46.0 82.5 46.0 90.7 91.4 127.0 – 30.2
3 ½” 90 228.5 184.2 22.2 8 34.9 101.6 133.4 49.3 85.7 49.3 103.4 104.1 140.0 – 31.7
4” 100 273.0 215.9 25.4 8 38.1 114.3 152.4 54.0 101.6 54.0 116.1 116.8 157.2 – 33.3
5” 125 330.2 266.7 28.6 8 44.4 141.2 188.9 60.3 114.3 60.3 143.8 144.5 185.7 – 36.5
6” 150 355.6 292.1 28.6 12 47.6 168.4 222.2 66.7 117.5 66.7 170.7 171.4 215.9 – 39.7
8” 200 419.1 349.2 31.7 12 55.6 219.2 273.0 76.2 133.3 76.2 221.5 222.2 269.9 – 44.4
10” 250 508.0 431.8 34.9 16 63.5 273.0 342.9 85.7 152.4 111.2 276.3 277.4 323.8 – 49.2
12” 300 558.8 488.9 34.9 20 66.7 323.8 400.0 92.1 155.6 117.3 327.1 328.2 381.0 – 55.6
14” 350 603.2 527.0 38.1 20 69.9 355.6 431.8 93.7 165.1 127.0 359.1 360.2 412.7 – 57.1
16” 400 685.8 603.2 41.3 20 76.2 406.4 495.3 106.4 177.8 139.7 410.5 411.2 469.9 – 63.5
18” 450 742.9 654.0 44.4 24 82.6 457.2 546.1 117.5 184.1 152.4 461.8 462.3 533.4 – 68.3
20” 500 812.8 723.9 44.4 24 88.9 508.0 609.6 127.0 190.5 165.1 513.1 514.3 584.2 – 73.0
24” 600 939.8 838.2 50.8 24 101.6 609.6 717.5 139.7 203.2 184.1 615.9 615.9 692.1 – 82.5
Industrial Flanges

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