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BLIND FLANGES ASME B16.5 Class 150

Nominal
Size
NPS		 Outside
Diameter
of
Flange		 Thickness
of
Flange		 Diameter Of Raised
Face (1)		 Number of
Bolt Holes		 Diameter
of
Bolt
Holes		 Diameter
of
Bolts		 Diameter
of
Bolt
Circle		 Approx.
Weight

Pounds
Kg
O C R
½ in. 3.5 0.44 1.38 4 0.62 ½ 2.38 1
mm 88.9 11.2 35.1 15.7 12.7 60.5 0.5
¾ in. 3.88 0.5 1.69 4 0.62 ½ 2.75 2
mm 98.6 12.7 42.9 15.7 12.7 69.9 1
1 in. 4.25 0.56 2 4 0.62 ½ 3.12 2
mm 108 14.2 50.8 15.7 12.7 79.2 1
1 ¼  in. 4.62 0.62 2.5 4 0.62 ½ 3.5 3
mm 117.3 15.7 63.5 15.7 12.7 88.9 1
1 ½  in. 5 0.69 2.88 4 0.62 ½ 3.88 4
mm 127 17.5 73.2 15.7 12.7 98.6 2
2 in. 6 0.75 3.62 4 0.75  5/8 4.75 5
mm 152.4 19.1 91.9 19.1 15.9 120.7 2
2 ½  in. 7 0.88 4.12 4 0.75  5/8 5.5 7
mm 177.8 22.4 104.6 19.1 15.9 139.7 3
3 in. 7.5 0.94 5 4 0.75  5/8 6 9
190.5 23.9 127 19.1 15.9 152.4 4
3 ½ in. 8.5 0.94 5.5 8 0.75  5/8 7 13
mm 215.9 23.9 139.7 19.1 15.9 177.8 6
4 in. 9 0.94 6.19 8 0.75  5/8 7.5 17
mm 228.6 23.9 157.2 19.1 15.9 190.5 8
5 in. 10 0.94 7.31 8 0.88 ¾ 8.5 20
mm 254 23.9 185.7 22.4 19.1 215.9 9
6 in. 11 1 8.5 8 0.88 ¾ 9.5 26
mm 279.4 25.4 215.9 22.4 19.1 241.3 12
8 in. 13.5 1.12 10.62 8 0.88 ¾ 11.75 45
mm 342.9 28.4 269.7 22.4 19.1 298.5 20
10 in. 16 1.19 12.75 12 1  7/8 14.25 70
mm 406.4 30.2 323.9 25.4 22.2 362 32
12 in. 19 1.25 15 12 1  7/8 17 110
mm 482.6 31.8 381 25.4 22.2 431.8 50
14 in. 21 1.38 16.25 12 1.12 1 18.75 140
mm 533.4 35.1 412.8 28.4 25.4 476.3 64
16 in. 23.5 1.44 18.5 16 1.12 1 21.25 180
mm 596.9 36.6 469.9 28.4 25.4 539.8 82
18 in. 25 1.56 21 16 1.25 1 1/8 22.75 220
mm 635 39.6 533.4 31.8 28.6 577.9 100
20 in. 27.5 1.69 23 20 1.25 1 1/8 25 285
mm 698.5 42.9 584.2 31.8 28.6 635 129
24 in. 32 1.88 27.25 20 1.38 1 ¼ 29.5 430
mm 812.8 47.8 692.2 35.1 31.8 749.3 195

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