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Lap Joint Flanges – Class 300

Lap Joint Flanges

Class 300

  Nominal size O C X Y B R No. of holes Diam. of holes Diam. of bolts Diam. of bolt circle Approx. weight pounds Kg
    O C X Y B r          
in. 1/2″ 3.75 0.56 1.5 0.88 0.9 0.12 4 0.62 1/2″ 2.62 2
mm.   95.3 14.2 38.1 22.4 22.9 3   15.7 12.7 66.5 1
in. 3/4″ 4.62 0.62 1.88 1 1.11 0.12 4 0.75 5/8″ 3.25 3
mm.   117.3 15.7 47.8 25.4 28.2 3   19.1 15.9 82.6 1
in. 1″ 4.88 0.69 2.12 1.06 1.38 0.12 4 0.75 5/8″ 3.5 3
mm.   124 17.5 53.8 26.9 35.1 3   19.1 15.9 88.9 1
in. 1 1/4″ 5.25 0.75 2.5 1.06 1.72 0.19 4 0.75 5/8″ 3.88 4
mm.   133.4 19.1 63.5 26.9 43.7 4.8   19.1 15.9 98.6 2
in. 1 1/2″ 6.12 0.81 2.75 1.19 1.97 0.25 4 0.88 3/4″ 4.5 6
mm.   155.4 20.6 69.9 30.2 50 6.4   22.4 19.1 114.3 3
in. 2″ 6.5 0.88 3.31 1.31 2.46 0.31 8 0.75 5/8″ 5 7
mm.   165.1 22.4 84.1 33.3 62.5 7.9   19.1 15.9 127 3
in. 2 1/2″ 7.5 1 3.94 1.5 2.97 0.31 8 0.88 3/4″ 5.88 10
mm.   190.5 25.4 100.1 38.1 75.4 7.9   22.4 19.1 149.4 5
in. 3″ 8.25 1.12 4.62 1.69 3.6 0.38 8 0.88 3/4″ 6.62 13
mm.   209.6 28.4 117.3 42.9 91.4 9.7   22.4 19.1 168.1 6
in. 3 1/2″ 9 1.19 5.25 1.75 4.1 0.38 8 0.88 3/4″ 7.25 17
mm.   228.6 30.2 133.4 44.5 104.1 9.7   22.4 19.1 184.2 8
in. 4″ 10 1.25 5.75 1.88 4.6 0.44 8 0.88 3/4″ 7.88 22
mm.   254 31.8 146.1 47.8 116.8 11.2   22.4 19.1 200.2 10
in. 5″ 11 1.38 7 2 5.69 0.44 8 0.88 3/4″ 9.25 28
mm.   279.4 35.1 177.8 50.8 144.5 11.2   22.4 19.1 235 13
in. 6″ 12.5 1.44 8.12 2.06 6.75 0.5 12 0.88 3/4″ 10.62 39
mm.   317.5 36.6 206.2 52.3 171.5 12.7   22.4 19.1 269.7 18
in. 8″ 15 1.62 10.25 2.44 8.75 0.5 12 1 7/8″ 13 58
mm.   381 41.1 260.4 62 222.3 12.7   25.4 22.2 330.2 26
in. 10″ 17.5 1.88 12.62 3.75 10.92 0.5 16 1.12 1″ 15.25 91
mm.   444.5 47.8 320.5 95.3 277.4 12.7   28.4 25.4 387.4 41
in. 12″ 20.5 2 14.75 4 12.92 0.5 16 1.25 1 1/8″ 17.75 140
mm.   520.7 50.8 374.7 101.6 328.2 12.7   31.8 28.6 450.9 64
in. 14″ 23 2.12 16.75 4.38 14.18 0.5 20 1.25 1 1/8″ 20.25 190
mm.   584.2 53.8 425.5 111.3 360.2 12.7   31.8 28.6 514.4 86
in. 16″ 25.5 2.25 19 4.75 16.19 0.5 20 1.38 1 1/4″ 22.5 250
mm.   647.7 57.2 482.6 120.7 411.2 12.7   35.1 31.8 571.5 113
in. 18″ 28 2.38 21 5.12 18.2 0.5 24 1.38 1 1/4″ 24.75 295
mm.   711.2 60.5 533.4 130 462.3 12.7   35.1 31.8 628.7 134
in. 20″ 30.5 2.5 23.12 5.5 20.25 0.5 24 1.38 1 1/4″ 27 370
mm.   774.7 63.5 587.2 139.7 514.4 12.7   35.1 31.8 685.8 168
in. 24″ 36 2.75 27.62 6 24.25 0.5 24 1.62 1 1/2″ 32 550
mm.   914.4 69.9 701.5 152.4 616 12.7   41.1 38.1 812.8 249
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