ASME B16.47 Series B/API 605 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 26 785 39.8 87 684 661.9 711 636.5 744.5 36 22.2 10 62.61 28 835 43.0 94 735 712.7 762 687.3 795.3 40 22.2 10 71.98 30 885 43.0 98 787 763.5 813 738.1 846.1 44 22.2 10 78.00 32 940 44.6 106 840 814.3 864 788.9 900.1 48 22.2 10 90.31 34 1005 47.7 109 892 865.1 921 839.7 957.3 40 25.4 10 109.16 36 1055 50.9 116 945 915.9 972 890.5 1009.6 44 25.4 10 122.69 38 1125 52...