Lap joint flanges ASME B16.5 CLASS 2500 ASME B16.5

Nominal
Size
NPS
Outside
Diameter
of
Flange
Thickness
of
Flange
Diameter
Of Hub
At Base (1)
Length
thru
Hub
Diameter
Of
Bore
Fillet
Radius
Number of
Bolt Holes
Diameter
of
Bolt
Holes
Diameter
of
Bolts
Diameter
of
Bolt
Circle
Approx.
Weight

Pounds
Kg

O C X Y B r
½ in. 5.25 1.19 1.69 1.56 0.9 0.12 4 0.88 ¾ 3.5 7
mm 133.4 30.2 42.9 39.6 22.9 3 22.4 19.1 88.9 3
¾ in. 5.5 1.25 2 1.69 1.11 0.12 4 0.88 ¾ 3.75 8
mm 139.7 31.8 50.8 42.9 28.2 3 22.4 19.1 95.3 4
1 in. 6.25 1.38 2.25 1.88 1.38 0.12 4 1  7/8 4.25 11
mm 158.8 35.1 57.2 47.8 35.1 3 25.4 22.2 108 5
1 ¼  in. 7.25 1.5 2.88 2.06 1.72 0.19 4 1.12 1 5.12 16
mm 184.2 38.1 73.2 52.3 43.7 4.8 28.4 25.4 130 7
1 ½  in. 8 1.75 3.12 2.38 1.97 0.25 4 1.25 1 1/8 5.75 22
mm 203.2 44.5 79.2 60.5 50 6.4 31.8 28.6 146.1 10
2 in. 9.25 2 3.75 2.75 2.46 0.31 8 1.12 1 6.75 37
mm 235 50.8 95.3 69.9 62.5 7.9 28.4 25.4 171.5 17
2 ½  in. 10.5 2.25 4.5 3.12 2.97 0.31 8 1.25 1 1/8 7.75 53
mm 266.7 57.2 114.3 79.2 75.4 7.9 31.8 28.6 196.9 24
3 in. 12 2.62 5.25 3.62 3.6 0.38 8 1.38 1 ¼ 9 80
mm 304.8 66.5 133.4 91.9 91.4 9.7 35.1 31.8 228.6 36
4 in. 14 3 6.5 4.25 4.6 0.44 8 1.62 1 ½ 10.75 120
mm 355.6 76.2 165.1 108 116.8 11.2 41.1 38.1 273.1 54
5 in. 16.5 3.62 8 5.12 5.69 0.44 8 1.88 1 ¾ 12.75 205
mm 419.1 91.9 203.2 130 144.5 11.2 47.8 44.5 323.9 93
6 in. 19 4.25 9.25 6 6.75 0.5 8 2.12 2 14.5 315
mm 482.6 108 235 152.4 171.5 12.7 53.8 50.8 368.3 143
8 in. 21.75 5 12 7 8.75 0.5 12 2.12 2 17.25 470
mm 552.5 127 304.8 177.8 222.3 12.7 53.8 50.8 438.2 213
10 in. 26.5 6.5 14.75 9 10.92 0.5 12 2.62 2 ½ 21.25 900
mm 673.1 165.1 374.7 228.6 277.4 12.7 66.5 63.5 539.8 408
12 in. 30 7.25 17.38 10 12.92 0.5 12 2.88 2 ¾ 24.38 1100
mm 762 184.2 441.5 254 328.2 12.7 73.2 69.9 619.3 499