ASME/ANSI B16.5 Class 600 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.
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 | 8.56 |
4 | 275 | 38.1 | 152 | 54 | 116.8 | 11 | 215.9 | 25.4 | 8 | 14.29 |
5 | 330 | 44.5 | 189 | 60 | 144.4 | 11 | 266.7 | 28.6 | 8 | 23.80 |
6 | 355 | 47.7 | 222 | 67 | 171.4 | 13 | 292.1 | 28.6 | 12 | 27.93 |
8 | 420 | 55.6 | 273 | 76 | 222.2 | 13 | 349.2 | 31.8 | 12 | 42.59 |
10 | 510 | 63.5 | 343 | 111 | 277.4 | 13 | 431.8 | 34.9 | 16 | 76.04 |
12 | 560 | 66.7 | 400 | 117 | 328.2 | 13 | 489.0 | 34.9 | 20 | 90.92 |
14 | 605 | 69.9 | 432 | 127 | 360.2 | 13 | 527.0 | 38.1 | 20 | 109.42 |
16 | 685 | 76.2 | 495 | 140 | 411.2 | 13 | 603.2 | 41.3 | 20 | 154.99 |
18 | 745 | 82.6 | 546 | 152 | 462.3 | 13 | 654.0 | 44.5 | 20 | 189.94 |
20 | 815 | 88.9 | 610 | 165 | 514.4 | 13 | 723.9 | 44.5 | 24 | 243.66 |
24 | 940 | 101.6 | 718 | 184 | 616.0 | 13 | 838.2 | 50.8 | 24 | 346.39 |