INDUSTRY STANDARD FLANGES Class 125 – Slip-on and Blind Flanges

Nominal
Size
NPS
Outside
Diameter
of
Flange
Thickness
of
Flange
Length
thru
Hub
Diameter Of Hub At Base Diameter Of Raised
Face
Diameter of Bore Diameter
of
Bolt
Circle
Number of
Bolt Holes
Diameter
of
Bolt
Holes
SOFT BLIND
O C C Y X R B
26 in. 34.25 2 2 3.38 28.5 29.5 26.25 31.75 24 1.38
mm 870 50.8 50.8 85.9 723.9 749.3 666.8 806.5 35.1
28 in. 36.5 2.06 2.12 3.44 30.75 31.5 28.25 34 00 28 1.38
mm 927.1 52.3 53.8 87.4 781.1 800.1 717.6 863.6 35.1
30 in. 38.75 2.13 2.12 3.5 32.75 33.75 30.25 36 28 1.38
mm 984.3 54.1 53.8 88.9 831.9 857.3 768.4 914.4 35.1
32 in. 41,75 2.25 2.25 3.63 35 36 32.25 38.5 28 1.63
mm 1060.5 57.2 57.2 92.2 889 914.4 819.2 977.9 41.4
34 in. 43.75 2.31 2.31 3.68 37 38 34.25 40.5 32 1.63
mm 1111.3 58.7 58.7 93.5 939.8 965.2 870 1028.7 41.4
36 in. 46 2.38 2.38 3.75 39.25 40.25 36.25 42.75 32 1.63
mm 1168.4 60.5 60.5 95.3 997 1022.4 920.8 1085.9 41.4
38 in. 48.75 2.38 2.38 3.75 41.75 42.25 38.25 45.25 32 1.63
mm 1238.3 60.5 60.5 95.3 1060.5 1073.2 971.6 1149.4 41.4
40 in. 50.75 2.5 2.5 3.88 43.75 44.25 40.25 47.25 36 1.63
mm 1289.1 63.5 63.5 98.6 1111.3 1124 1022.4 1200.2 41.4
42 in. 53 2.63 2.62 4 46 47 42.25 49.5 36 1.63
mm 1346.2 66.8 66.5 101.6 1168.4 1193.8 1073.2 1257.3 41.4
44 in. 55.25 2.63 2.62 4 48 49 44.25 51.75 40 1.63
mm 1403.4 66.8 66.5 101.6 1219.2 1244.6 1124 1314.5 41.4
46 in. 57.25 2.68 2.69 4.06 50 51 46.25 53.75 40 1.63
mm 1454.2 68.1 68.3 103.1 1270 1295.4 1174.8 1365.3 41.4
48 in. 59.5 2.75 2.75 4 13 52.25 53.5 48.25 56 00 44 1.63
mm 1511.3 69.9 69.9 104 9 1327*2 1358.9 1225.6 1422.4 41.4
50 in. 61.75 2.75 2.75 4.13 54.25 55.5 50.25 58.25 44 1.88
mm 1568.5 69.9 69.9 104.9 1378 1409.7 1276.4 1479.6 47.8
52 in. 64 2.88 2.88 4.25 56.5 57.5 52.25 60.5 44 1.88
mm 1626.6 73.2 73.2 108 1435.1 1469.5 1327.2 15Si.7 47.8
54 in. 66.25 3 3 4.38 58.75 59.75 54.25 62.75 44 1.88
mm 1682.8 76.2 76.2 111.3 1492.3 1517.7 1378 1593.9 47.8
60 in. 73 3.13 3.12 4.5 65.25 66 60.25 69.25 52 1.88
mm 1854.2 79.5 79.2 114.3 1657 4 1676 4 1530.4 1759 47.8
66 in. 80 3.38 3.38 4.88 71.5 73 66.25 76 52 1.88
mm 2032 85.9 85.9 124 1816.1 1854.2 1682.8 1930.4 47.8
72 in. 86.5 3.5 3.5 5 78.5 79.5 72.25 82.5 60 1.88
mm 2197.1 88.9 88 9 127 1993.9 2019.3 1835.2 2095.5 47.8
84 in. 99.75 3.88 4.06 5.38 90.5 92.5 84.25 95.5 64 2.13
mm 2533.7 98.6 103.1 136.7 2298.7 2349.5 2140 2425.7 54.1
96 in. 113.25 4.25 4.56 5.75 102.75 105.5 96.25 108.5 68 2.38
mm 2876.6 108 115.8 146.1 2609.9 2679.7 2444.8 2755.9 60.5