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Welding Neck Flanges – Class 1500

Welding Neck Flanges

Class 1500

Nominal size   O C R X A Y No. of holes Diam. of holes Diam. of bolts Diam. of bolt circle Approx. weight pounds Kg
    O C R X A Y          
in. 1/2″ 4.75 0.88 1.38 1.5 0.84 2.38 4 0.88 3/4″ 3.25 5
mm.   120.7 22.4 35.1 38.1 21.3 60.5   22.4 19.1 82.6 2
in. 3/4″ 5.12 1 1.69 1.75 1.05 2.75 4 0.88 3/4″ 3.5 6
mm.   130 25.4 42.9 44.5 26.7 69.9   22.4 19.1 88.9 3
in. 1″ 5.88 1.12 2 2.06 1.32 2.88 4 1 7/8″ 4 9
mm.   149.4 28.4 50.8 52.3 33.5 73.2   25.4 22.2 101.6 4
in. 1 1/4″ 6.25 1.12 2.5 2.5 1.66 2.88 4 1 7/8″ 4.38 10
mm.   158.8 28.4 63.5 63.5 42.2 73.2   25.4 22.2 111.3 5
in. 1 1/2″ 7 1.25 2.88 2.75 1.9 3.25 4 1.12 1″ 4.88 13
mm.   177.8 31.8 73.2 69.9 48.3 82.6   28.4 25.4 124 6
in. 2″ 8.5 1.5 3.62 4.12 2.38 4 8 1 7/8″ 6.5 25
mm.   215.9 38.1 91.9 104.6 60.5 101.6   25.4 22.2 165.1 11
in. 2 1/2″ 9.62 1.62 4.12 4.88 2.88 4.12 8 1.12 1″ 7.5 36
mm.   244.3 41.1 104.6 124 73.2 104.6   28.4 25.4 190.5 16
in. 3″ 10.5 1.88 5 5.25 3.5 4.62 8 1.25 1 1/8″ 8 48
mm.   266.7 47.8 127 133.4 88.9 117.3   31.8 28.6 203.2 22
in. 4″ 12.25 2.12 6.19 6.38 4.5 4.88 8 1.38 1 1/4″ 9.5 73
mm.   311.2 53.8 157.2 162.1 114.3 124   35.1 31.8 241.3 33
in. 5″ 14.75 2.88 7.31 7.75 5.56 6.12 8 1.62 1 1/2″ 11.5 130
mm.   374.7 73.2 185.7 196.9 141.2 155.4   41.1 38.1 292.1 59
in. 6″ 15.5 3.25 8.5 9 6.63 6.75 12 1.5 1 3/8″ 12.5 165
mm.   393.7 82.6 215.9 228.6 168.4 171.5   38.1 34.9 317.5 75
in. 8″ 19 3.62 10.62 11.5 8.63 8.38 12 1.75 1 5/8″ 15.5 275
mm.   482.6 91.9 269.7 292.1 219.2 212.9   44.5 41.3 393.7 125
in. 10″ 23 4.25 12.75 14.5 10.75 10 12 2 1 7/8″ 19 455
mm.   584.2 108 323.9 368.3 273.1 254   50.8 47.6 482.6 206
in. 12″ 26.5 4.88 15 17.75 12.75 11.12 16 2.12 2″ 22.5 690
mm.   673.1 124 381 450.9 323.9 282.4   53.8 50.8 571.5 313
in. 14″ 29.5 5.25 16.25 19.5 14 11.75 16 2.38 2 1/4″ 25 940
mm.   749.3 133.4 412.8 495.3 355.6 298.5   60.5 57.2 635 426
in. 16″ 32.5 5.75 18.5 21.75 16 12.25 16 2.62 2 1/2″ 27.75 1250
mm.   825.5 146.1 469.9 552.5 406.4 311.2   66.5 63.5 704.9 567
in. 18″ 36 6.38 21 23.5 18 12.88 16 2.88 2 3/4″ 30.5 1625
mm.   914.4 162.1 533.4 596.9 457.2 327.2   73.2 69.9 774.7 737
in. 20″ 38.75 7 23 25.25 20 14 16 3.12 3″ 32.75 2050
mm.   984.3 177.8 584.2 641.4 508 355.6   79.2 76.2 831.9 930
in. 24″ 46 8 27.25 30 24 16 16 3.62 3 1/2″ 39 3325
mm.   1168.4 203.2 692.2 762 609.6 406.4   91.9 88.9 990.6 1508
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