ASME B16.47 Series B / API 605 Class 900 WN

Norminal Pipe Size O.D.of Flange, O Min.Thick-ness of WN Flange, tf Lenth Through Hub, Y Diam. of Hub, X Hub Diam. Top, A Raised Fase Diam., R Bore (XS) Diam of Bolt Circle No.of Bolt Holes Diam.of Bolt Hole Min.Fillet Radius, r1 Approxi-mate Weight kgs
26 1020 135.0 259 743 660.4 762 635.0 901.7 20 66.7 11 532.55
28 1105 147.7 276 797 711.2 819 685.8 971.6 20 73.0 13 673.44
30 1180 155.6 289 851 762.0 876 736.6 1035.0 20 79.4 13 793.39
32 1240 160.4 303 908 812.8 927 787.4 1092.2 20 79.4 13 899.59
34 1315 171.5 319 962 863.6 991 838.2 1155.7 20 85.7 14 1061.78
36 1345 173.1 325 1016 914.4 1029 889.0 1200.2 24 79.4 14 1070.53


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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