class 2500 flange dimensions

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by Creative Piping
ANSI B16.5 Class 2500 Flanges Dimensions
ANSI B 16.5 Class 2500 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” 15 133.3 88.9 22.2 4 30.2 21.3 42.9 39.7 73.3 39.7 22.3 22.9 34.9 – 28.6
3/4” 20 139.7 95.2 22.2 4 31.7 26.7 50.8 42.9 79.4 42.9 27.7 28.2 42.9 – 31.7
1” 25 158.7 107.9 25.4 4 34.9 33.5 57.1 47.7 88.9 47.7 34.5 35.0 50.8 – 34.9
1 ¼” 32 184.1 130.2 28.6 4 38.1 42.2 73.0 52.4 95.2 52.4 43.2 43.7 63.5 – 38.1
1 ½” 40 203.2 146.0 31.7 4 44.4 48.3 79.4 60.3 111.1 60.3 49.5 50.0 73.0 – 44.4
2” 50 234.9 171.4 28.6 8 50.8 60.4 95.2 69.8 127.0 69.8 62.0 62.5 92.1 – 50.8
2 ½” 65 266.7 196.8 31.7 8 57.1 73.1 114.3 79.4 142.9 79.4 74.7 75.4 104.8 – 57.1
3” 80 304.8 228.6 34.9 8 66.7 88.9 133.3 92.1 168.3 92.1 90.7 91.4 127.0 – 63.5
4” 100 355.6 273.0 41.3 8 76.2 114.3 165.1 107.9 190.5 107.9 116.1 116.8 157.2 – 69.8
5” 125 419.1 323.8 47.6 8 92.1 141.2 203.2 130.0 128.6 130.0 143.8 144.5 185.7 – 76.2
6” 150 482.6 368.3 54.0 8 107.9 168.4 234.9 152.4 273.0 152.4 170.7 171.4 215.9 – 82.5
8” 200 552.4 438.1 54.0 12 127.0 219.2 304.8 177.8 317.5 177.8 221.5 222.2 269.9 – 95.2
10” 250 673.1 539.7 66.7 12 165.1 273.0 374.6 228.6 419.1 228.6 276.3 277.4 323.8 – 107.9
12” 300 762.0 619.1 73.0 12 184.1 323.8 441.3 254.0 463.5 254.0 327.1 328.2 381.0 – 120.6
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