Class 900 Forged Flange

Class 900 Flanges Technical Specifications Dimensions of Class 900 Flanges (ANSI B 16.5) in mm Nominal Pipe size Flange Dia 'O' Dia of Bolt circle 'A' Dia of Bolt Holes 'D' No. of Holes Thk of Flange 'C' Diameter at Weld Bevel Dia of Hub 'E' Length through Hub Bore 'B' Dia of R/F R Depth of Socket F Length of Threading S/O & S/W Y W/NY L/J Y S/O & S/WB L/J B 1/2 15 95.2 66.7 15.9 4 14.3 21.3 38.1 22.2 52.4 22.2 22.3 22.9 34.9 9.5 15.9 3/4 20 117.5 82.5 19.0 4 15.9 26.7 47.6 25.4 57.1 25.4 27.7 28.2 42.9 11.1 15.9 1 25 123.8 88.9 19.0 4 17.5 33.5 54 27 61.9 27 34.5 35 50.8 12.7 17.5 1 1/4 32 133.3 98.4 19.0 4 20.6 42.2 63.5 28.6 66.7 28.6 43.2 43.7 63.5 14.3 20.6 1 1/2 40 155.6 114.3 22.2 4 22.2 48.3 69.8 31.7 69.8 31.7 49.5 50 73 15.9 22.2 2 50 165.1 127 19.0 8 25.4 60.4 84.1 36.5 73 36.5 62 62.5 92.1 17.5 25.4 2 1/2 65 190.5 149.2 22.2 8 28.6 73.1 100 41.3 79.4 41.3 74.7 75.4 104.8 19.0 28.6 3 80 209.5 168.3 22.2 8 31.8 88.9 117.5 46 82.5 46 90.7 91.4 127.0 30.2 3 1/2 90 228.5 184.2 22.2 8 34.9 101.6 133.4 49.3 85.7 49. 103.4 104.1 140 31.7 4 100 273.0 215.9 25.4 8 38.1 114.3 152.4 54 101.6 54 116.1 116.8 157.2 33.3 5 125 330.2 266.7 28.6 8 44.4 141.2 188.9 60.3 114.3 60.3 143.8 144.5 185.7 36.5 6 150 355.6 292.1 28.6 12 47.6 168.4 222.2 66.7 117.5 66.7 170.7 171.4 215.9 39.7 8 200 419.1 349.2 31.7 12 55.6 219.2 273 76.2 133.3 76.2 221.5 222.2 269.9 44.4 10 250 508 431.8 34.9 16 63.5 273.0 342.9 85.7 152.4 111.2 276.3 277.4 323.8 49.2 12 300 558.8 488.9 34.9 20 66.7 323.8 400 92.1 155.6 117.3 327.1 328.2 381 55.6 14 350 603.2 527 38.1 20 69.9 355.6 431.8 93.7 165.1 127 359.1 360.2 412.7 57.1 16 400 685.8 603.2 41.3 20 76.2 406.4 495.3 106.4 177.8 139.7 410.5 411.2 469.9 63.5 18 450 742.9 654 44.4 24 82.6 457.2 546.1 117.5 184.1 152.4 461.8 462.3 533.4 68.3 20 500 812.8 723.9 44.4 24 88.9 508 609.6 127 190.5 165.1 513.1 514.3 584.2 73.0 24 600 939.8 838.2 50.8 24 101.6 609.6 717.5 139.7 203.2 184.1 615.9 615.9 692.1 82.5