BLIND FLANGES ASME B16.5 Class 1500

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. 4.75 0.88 1.38 4 0.88 ¾ 3.25 4
mm 120.7 22.4 35.1 22.4 19.1 82.6 2
¾ in. 5.12 1 1.69 4 0.88 ¾ 3.5 6
mm 130 25.4 42.9 22.4 19.1 88.9 3
1 in. 5.88 1.12 2 4 1  7/8 4 8
mm 149.4 28.4 50.8 25.4 22.2 101.6 4
1 ¼  in. 6.25 1.12 2.5 4 1  7/8 4.38 9
mm 158.8 28.4 63.5 25.4 22.2 111.3 4
1 ½  in. 7 1.25 2.88 4 1.12 1 4.88 13
mm 177.8 31.8 73.2 28.4 25.4 124 6
2 in. 8.5 1.5 3.62 8 1  7/8 6.5 25
mm 215.9 38.1 91.9 25.4 22.2 165.1 11
2 ½  in. 9.62 1.62 4.12 8 1.12 1 7.5 35
mm 244.3 41.1 104.6 28.4 25.4 190.5 16
3 in. 10.5 1.88 5 8 1.25 1 1/8 8 48
266.7 47.8 127 31.8 28.6 203.2 22
4 in. 12.25 2.12 6.19 8 1.38 1 ¼ 9.5 73
mm 311.2 53.8 157.2 35.1 31.8 241.3 33
5 in. 14.75 2.88 7.31 8 1.62 1 ½ 11.5 140
mm 374.7 73.2 185.7 41.1 38.1 292.1 64
6 in. 15.5 3.25 8.5 12 1.5 1 3/8 12.5 160
mm 393.7 82.6 215.9 38.1 34.9 317.5 73
8 in. 19 3.62 10.62 12 1.75 1 5/8 15.5 300
mm 482.6 91.9 269.7 44.5 41.3 393.7 136
10 in. 23 4.25 12.75 12 2 1 7/8 19 510
mm 584.2 108 323.9 50.8 47.6 482.6 231
12 in. 26.5 4.88 15 16 2.12 2 22.5 690
mm 673.1 124 381 53.8 50.8 571.5 313
14 in. 29.5 5.25 16.25 16 2.38 2 ¼ 25 975
mm 749.3 133.4 412.8 60.5 57.2 635 442
16 in. 32.5 5.75 18.5 16 2.62 2 ½ 27.75 1300
mm 825.5 146.1 469.9 66.5 63.5 704.9 590
18 in. 36 6.38 21 16 2.88 2 ¾ 30.5 1750
mm 914.4 162.1 533.4 73.2 69.9 774.7 794
20 in. 38.75 7 23 16 3.12 3 32.75 2225
mm 984.3 177.8 584.2 79.2 76.2 831.9 1009
24 in. 46 8 27.25 16 3.62 2 ½ 39 3625
mm 1168.4 203.2 692.2 91.9 88.9 990.6 1644