ASME/ANSI B16.5 Class 150 LJ
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 90 11.2 30 16 22.9 3 60.3 15.9 4 0.46 3/4 100 12.7 38 16 28.2 3 69.9 15.9 4 0.66 1 110 14.3 49 17 34.9 3 79.4 15.9 4 0.89 1 1/4 115 15.9 59 21 43.7 5 88.9 15.9 4 1.06 1 1/2 125 17.5 65 22 50.0 6 98.4 15.9 4 1.36 2 150 19.1 78 25 62.5 8 120.7 19.1 4 2.10 2 1/2 180 22.3 90 29 75.4 8 139.7 19.1 4 3.58 3 190 23.9 108 30 91.4 10 152.4 19.1 4 4.00 3 1/2 215 23.9 122 32 104.1 10 177.8 19.1 8 4.99 4 2...