BLIND FLANGES ASME B16.5 Class 900

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
1
1 ¼
1 ½
2 Sizes ½ thru 2 ½ are identical to Class 1500
2 ½
3 in. 9.5 1.5 5 8 1  7/8 7.5 29
mm 241.3 38.1 127 25.4 22.2 190.5 13
4 in. 11.5 1.75 6.19 8 1.25 1 1/8 9.25 54
mm 292.1 44.5 157.2 31.8 28.6 235 24
5 in. 13.75 2 7.31 8 1.38 1 ¼ 11 87
mm 349.3 50.8 185.7 35.1 31.8 279.4 39
6 in. 15 2.19 8.5 12 1.25 1 1/8 12.5 115
mm 381 55.6 215.9 31.8 28.6 317.5 52
8 in. 18.5 2.5 10.62 12 1.5 1 3/8 15.5 200
mm 469.9 63.5 269.7 38.1 34.9 393.7 91
10 in. 21.5 2.75 12.75 16 1.5 1 3/8 18.5 290
mm 546.1 69.9 323.9 38.1 34.9 469.9 132
12 in. 24 3.12 15 20 1.5 1 3/8 21 415
mm 609.6 79.2 381 38.1 34.9 533.4 188
14 in. 25.25 3.38 16.25 20 1.62 1 ½ 22 520
mm 641.4 85.9 412.8 41.1 38.1 558.8 236
16 in. 27.75 3.5 18.5 20 1.75 1 5/8 24.25 600
mm 704.9 88.9 469.9 44.5 41.3 616 272
18 in. 31 4 21 20 2 1 7/8 27 850
mm 787.4 101.6 533.4 50.8 47.6 685.8 386
20 in. 33.75 4.25 23 20 2.12 2 29.5 1075
mm 857.3 108 584.2 53.8 50.8 749.3 488
24 in. 41 5.5 27.25 20 2.62 2 ½ 35.5 2025
mm 1041.4 139.7 692.2 66.5 63.5 901.7 919