ASME B16.47 Series A/MSS SP-44 Class 150 WN
The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. The welding neck flange is the best designed butt-welded flange of those currently available because of its inherent structural value. It is expensive because of the design. 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 26 870 66.7 119 676 660.4 749 635.0 806.4 24 34.9 10 149.41 28 925 69.9 124 727 711.2 800 685.8 863.6 28 34.9 11 169.16 30 985 73.1 135 781 762.0 857 736.6 914.2 28 34.9 11 199.94 32 1060 79.4 143 832 812.8 914 787.4 977.9 28 41.3 11 248.11 34 1110 81.0 148 883 863.6 965 838.2 1028.7 32 41.3 13 265.05 36 1170 88.9 156 933 914.4 1022 889.0 1085.8 32 41.3 13 316.63 3...