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 of Blind flanges

What is the use of a blind flange

Most common flange types

Regardless of custom sizing or specifications, the fundamental design of most flanges falls under six common styles created to close, connect, cover, or support pipes and pipe systems.



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