ASME/ANSI B16.5 Class 1500 BL

Nominal Pipe Size Outside Diameter of Flange Diameter of Raised Face Thickness of Flanges Min. Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approximate Weight kgs
NPS O R tf W I n
1/2 120 34.9 22.3 82.6 22.2 4 1.76
3/4 130 42.9 25.4 88.9 22.2 4 2.42
1 150 50.8 28.6 101.6 25.4 4 3.63
1 1/4 160 63.5 28.6 111.1 25.4 4 4.24
1 1/2 180 73.0 31.8 123.8 28.6 4 5.95
2 215 92.1 38.1 165.1 25.4 8 10.02
2 1/2 245 104.8 41.3 190.5 28.6 8 14.11
3 265 127.0 47.7 203.2 31.8 8 18.99
4 310 157.2 54.0 241.3 34.9 8 29.83
5 375 185.7 73.1 292.1 41.3 8 58.77
6 395 215.9 82.6 317.5 38.1 12 72.65
8 485 269.9 92.1 393.7 44.5 12 123.34
10 585 323.8 108.0 482.6 50.8 12 211.94
12 675 381.0 123.9 571.5 54.0 16 318.94
14 750 412.8 133.4 635.0 60.3 16 422.42
16 825 469.9 146.1 704.8 66.7 16 558.96
18 915 533.4 162.0 774.7 73.0 16 763.84
20 985 584.2 177.8 831.8 79.4 16 968.52
24 1170 692.2 203.2 990.6 92.1 16 1566.88

Standards, Dimensions & Weight ofBlind flanges

What is the use of a blind flange

Flanges specification, Standard and identification

Below you will find a short description and definition of each type, completed with an detailed image.