ASME B16.47 Series A/MSS SP-44 Class 300 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 26 970 77.8 183 721 660.4 749 635.0 876.3 28 44.5 10 281.42 28 1035 84.2 195 775 711.2 800 685.8 939.8 28 44.5 11 341.50 30 1090 90.5 208 827 762.0 857 736.6 997.0 28 47.6 11 391.62 32 1150 96.9 221 881 812.8 914 787.4 1054.1 28 50.8 11 453.92 34 1205 100.1 230 937 863.6 965 838.2 1104.9 28 50.8 13 507.59 36 1270 103.2 240 991 914.4 1022 889.0 1168.4 32 54.0 13 56...