BLIND FLANGES ASME B16.5 Class 2500

Nominal
Size
NPS
Outside
Diameter
of
Flange
Thickness
of
Flange
Diameter Of Raised
Face
Number of
Bolt Holes
Diameter
of
Bolt
Holes
Diameter
of
Bolts
Diameter
of
Bolt
Circle
Approx.
Weight

Pounds
Kg

O C R
½ in. 5.25 1.19 1.38 4 0.88 ¾ 3.5 7
mm 133.4 30.2 35.1 22.4 19.1 88.9 3
¾ in. 5.5 1.25 1.69 4 0.88 ¾ 3.75 8
mm 139.7 31.8 42.9 22.4 19.1 95.3 4
1 in. 6.25 1.38 2 4 1  7/8 4.25 11
mm 158.8 35.1 50.8 25.4 22.2 108 5
1 ¼  in. 7.25 1.5 2.5 4 1.12 1 5.12 17
mm 184.2 38.1 63.5 28.4 25.4 130 8
1 ½  in. 8 1.75 2.88 4 1.25 1 1/8 5.75 23
mm 203.2 44.5 73.2 31.8 28.6 146.1 10
2 in. 9.25 2 3.62 8 1.12 1 6.75 39
mm 235 50.8 91.9 28.4 25.4 171.5 18
2 ½  in. 10.5 2.25 4.12 8 1.25 1 1/8 7.75 56
mm 266.7 57.2 104.6 31.8 28.6 196.9 25
3 in. 12 2.62 5 8 1.38 1 ¼ 9 86
304.8 66.5 127 35.1 31.8 228.6 39
4 in. 14 3 6.19 8 1.62 1 ½ 10.75 135
mm 355.6 76.2 157.2 41.1 38.1 273.1 61
5 in. 16.5 3.62 7.31 8 1.88 1 ¾ 12.75 225
mm 419.1 91.9 185.7 47.8 44.5 323.9 102
6 in. 19 4.25 8.5 8 2.12 2 14.5 345
mm 482.6 108 215.9 53.8 50.8 368.3 156
8 in. 21.75 5 10.62 12 2.12 2 17.25 530
mm 552.5 127 269.7 53.8 50.8 438.2 240
10 in. 26.5 6.5 12.75 12 2.62 2 ½ 21.25 1025
mm 673.1 165.1 323.9 66.5 63.5 539.8 465
12 in. 30 7.25 15 12 2.88 2 ¾ 24.38 1300
mm 762 184.2 381 73.2 69.9 619.3 590