Pipe flange

The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face.  This radius is necessary to have the flange accommodate a lap joint stub end. Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. Nominal Pipe Size  Outside Diameter of Flange Thickness of Lap Joint Min. Diameter of Hub Length Through Hub Bore Corner Radius of Bore of Lapped Flange Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approxi-mate Weight kgs NPS O tf X Y B r W I n 　 1/2 135 30.2 43 40 22.9 3 88.9 22.2 4 3.01 3/4 140 31.8 51 43 28.2 3 95.2 22.2 4 3.43 1 160 35.0 57 48 34.9 3 108.0 25.4 4 4.87 1 1/4 185 38.1 73 52 43.7 5 130.2 28.6 4 7.12 1 1/2 205 44.5 79 60 50.0 6 146.0 31.8 4 10.10 2 235 50.9 95 70 62.5 8 171.4 28.6 8 14.67 2 1/2 265 57.2 114 79 75.4 8 196.8 31.8 8 20.91 3 305 66.7 133 92 91.4 10 228.6 34.9 8 32.29 4 355 76.2 165 108 116.8 11 273.0 41.3...

The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face. This radius is necessary to have the flange accommodate a lap joint stub end.  Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. ASME/ANSI B16.5 Class 900 LJ Nominal Pipe Size  Outside Diameter of Flange Thickness of Lap Joint Min. Diameter of Hub Length Through Hub Bore Corner Radius of Bore of Lapped Flange Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approxi-mate Weight kgs NPS O tf X Y B r W I n 　 1/2 120 22.3 38 32 22.9 3 82.6 22.2 4 1.69 3/4 130 25.4 44 35 28.2 3 88.9 22.2 4 2.28 1 150 28.6 52 41 34.9 3 101.6 25.4 4 3.41 1 1/4 160 28.6 64 41 43.7 5 111.1 25.4 4 3.89 1 1/2 180 31.8 70 44 50.0 6 123.8 28.6 4 5.41 2 215 38.1 105 57 62.5 8 165.1 25.4 8 9.57 2 1/2 245 41.3 124 64 75.4 8 190.5 28.6 8 13.54 3 240 38.1 127 54 91.4 10 190.5 25.4 8 11.13 4 290 44.5 ...

The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face. This radius is necessary to have the flange accommodate a lap joint stub end.  Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. Nominal Pipe Size  Outside Diameter of Flange Thickness of Lap Joint Min. Diameter of Hub Length Through Hub Bore Corner Radius of Bore of Lapped Flange Diameter of Bolt Circle Diameter of Bolt Holes Number of Bolts Approxi-mate Weight kgs NPS O tf X Y B r W I n 　 1/2 95 14.3 38 22 22.9 3 66.7 15.9 4 0.70 3/4 115 15.9 48 25 28.2 3 82.6 19.1 4 1.16 1 125 17.5 54 27 34.9 3 88.9 19.1 4 1.50 1 1/4 135 20.7 64 29 43.7 5 98.4 19.1 4 2.01 1 1/2 155 22.3 70 32 50.0 6 114.3 22.2 4 2.83 2 165 25.4 84 37 62.5 8 127.0 19.1 8 3.42 2 1/2 190 28.6 100 41 75.4 8 149.2 22.2 8 5.00 3 210 31.8 117 46 91.4 10 168.3 22.2 8 6.71 3 1/2 230 35.0 133 49 104.1 10 184.2 25.4 8 8.5...