ASME/ANSI B16.5 Class 1500 WN

Nominal Pipe Size  Outside Diameter of Flange Diameter of Raised Face Thickness of Flanges Min. Diameter of Hub Hub Diameter Beginning of Chamfer Length Through Hub Bore Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approxi-mate Weight kgs
NPS O R tf X A Y B W I n  
1/2 120 34.9 22.3 38 21.3 60 15.8 82.6 22.2 4 1.86
3/4 130 42.9 25.4 44 26.7 70 21.0 88.9 22.2 4 2.55
1 150 50.8 28.6 52 33.4 73 26.6 101.6 25.4 4 3.78
1 1/4 160 63.5 28.6 64 42.2 73 35.1 111.1 25.4 4 4.40
1 1/2 180 73.0 31.8 70 48.3 83 40.9 123.8 28.6 4 6.12
2 215 92.1 38.1 105 60.3 102 52.5 165.1 25.4 8 10.86
2 1/2 245 104.8 41.3 124 73.0 105 62.7 190.5 28.6 8 15.20
3 265 127.0 47.7 133 88.9 117 77.9 203.2 31.8 8 19.61
4 310 157.2 54.0 162 114.3 124 102.3 241.3 34.9 8 29.63
5 375 185.7 73.1 197 141.3 156 128.2 292.1 41.3 8 56.87
6 395 215.9 82.6 229 168.3 171 154.1 317.5 38.1 12 68.10
8 485 269.9 92.1 292 219.1 213 202.7 393.7 44.5 12 116.26
10 585 323.8 108.0 368 273.0 254 254.5 482.6 50.8 12 200.20
12 675 381.0 123.9 451 323.8 283 304.7 571.5 54.0 16 300.10
14 750 412.8 133.4 495 355.6 298 336.5 635.0 60.3 16 392.98
16 825 469.9 146.1 552 406.4 311 387.3 704.8 66.7 16 498.22
18 915 533.4 162.0 597 457.0 327 437.9 774.7 73.0 16 651.35
20 985 584.2 177.8 641 508.0 356 488.9 831.8 79.4 16 795.97
24 1170 692.2 203.2 762 610.0 406 590.9 990.6 92.1 16 1265.87


Standards, Dimensions & Weight of WN flange

The welding neck flange is the best designed butt-welded flange of those currently available becuase of its inherent structural value.

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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