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ANSI / ASME CLASS 150 WELD NECK FLANGE DIMENSIONS

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weld neck flange dimensions

Class 150 Weld Neck Flange Dimensions as per ASME B16.5

Size in Inch Size in mm Outer Diameter Flange Thickness Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 90 9.6 30 21.3 46 According to Schedule 34.9 2 60.3 1.6
3/4 20 100 11.2 38 26.7 51 42.9 2 69.9 1.6
1 25 110 12.7 49 33.4 54 50.8 2 79.4 1.6
1 1/4 32 115 14.3 59 42.2 56 63.5 2 88.9 1.6
1 1/2 40 125 15.9 65 48.3 60 73 2 98.4 1.6
2 50 150 17.5 78 60.3 62 92.1 2 120.7 1.6
2 1/2 65 180 20.7 90 73 68 104.8 2 139.7 1.6
3 80 190 22.3 108 88.9 68 127 2 152.4 1.6
3 1/2 90 215 22.3 122 101.6 70 139.7 2 177.8 1.6
4 100 230 22.3 135 114.3 75 157.2 2 190.5 1.6
5 125 255 22.3 164 141.3 87 185.7 2 215.9 1.6
6 150 280 23.9 192 168.3 87 215.9 2 241.3 1.6
8 200 345 27 246 219.1 100 269.9 2 298.5 1.6
10 250 405 28.6 305 273 100 323.8 2 362 1.6
12 300 485 30.2 365 323.8 113 381 2 431.8 1.6
14 350 535 33.4 400 355.6 125 412.8 2 476.3 1.6
16 400 595 35 457 406.4 125 469.9 2 539.8 1.6
18 450 635 38.1 505 457.2 138 533.4 2 577.9 1.6
20 500 700 41.3 559 508 143 584.2 2 635 1.6
24 600 815 46.1 663 610 151 692.2 2 749.3 1.6

Class 150 Weld Neck Flange Stud & Bolt Dimesions

Size in Inch Size in mm No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size Weight in kg
1/2 15 4 1/2 50 55 5/8 M14 0.6
3/4 20 4 1/2 50 65 5/8 M14 0.9
1 25 4 1/2 55 65 5/8 M14 1.4
1 1/4 32 4 1/2 55 70 5/8 M14 1.4
1 1/2 40 4 1/2 65 70 5/8 M14 1.8
2 50 4 5/8 70 85 3/4 M16 2.7
2 1/2 65 4 5/8 75 90 3/4 M16 3.7
3 80 4 5/8 75 90 3/4 M16 4.6
3 1/2 90 8 5/8 75 90 3/4 M16 5.5
4 100 8 5/8 75 90 3/4 M16 6.8
5 125 8 3/4 85 95 7/8 M20 8.7
6 150 8 3/4 85 100 7/8 M20 10.9
8 200 8 3/4 90 110 7/8 M20 17.7
10 250 12 7/8 100 115 1 M24 24
12 300 12 7/8 100 120 1 M24 37
14 350 12 1 115 135 1 1/8 M27 50
16 400 16 1 115 135 1 1/8 M27 64
18 450 16 1 1/8 125 145 1 1/4 M30 68
20 500 20 1 1/8 140 160 1 1/4 M30 82
24 600 20 1 1/4 150 170 1 3/8 M33 118