THREADED FLANGES ASME B16.5 Class 2500

Nominal
Size
NPS
Outside
Diameter
of
Flange
Thickness
of
Flange
Diameter Of Raised
Face
Diameter
Of Hub
At Base (1)
Length
thru
Hub
Minimum Threaded Lenght Minimum Counter – Bore Number of
Bolt Holes
Diameter
of
Bolt
Holes
Diameter
of
Bolts
Diameter
of
Bolt
Circle
Approx.
Weight

Pounds
Kg

O C R X Y T Q
½ in. 5.25 1.19 1.38 1.69 1.56 1.12 0.93 4 0.88 ¾ 3.5 7
mm 133.4 30.2 35.1 42.9 39.6 28.4 23.6 22.4 19.1 88.9 3
¾ in. 5.5 1.25 1.69 2 1.69 1.25 1.14 4 0.88 ¾ 3.75 8
mm 139.7 31.8 42.9 50.8 42.9 31.8 29 22.4 19.1 95.3 4
1 in. 6.25 1.38 2 2.25 1.88 1.38 1.41 4 1  7/8 4.25 11
mm 158.8 35.1 50.8 57.2 47.8 35.1 35.8 25.4 22.2 108 5
1 ¼  in. 7.25 1.5 2.5 2.88 2.06 1.5 1.75 4 1.12 1 5.12 16
mm 184.2 38.1 63.5 73.2 52.3 38.1 44.5 28.4 25.4 130 7
1 ½  in. 8 1.75 2.88 3.12 2.38 1.75 1.99 4 1.25 1 1/8 5.75 22
mm 203.2 44.5 73.2 79.2 60.5 44.5 50.5 31.8 28.6 146.1 10
2 in. 9.25 2 3.62 3.75 2.75 2 2.5 8 1.12 1 6.75 38
mm 235 50.8 91.9 95.3 69.9 50.8 63.5 28.4 25.4 171.5 17
2 ½  in. 10.5 2.25 4.12 4.5 3.12 2.25 3 8 1.25 1 1/8 7.75 55
mm 266.7 57.2 104.6 114.3 79.2 57.2 76.2 31.8 28.6 196.9 25