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ANSI / ASME CLASS 2500 WELD NECK FLANGE DIMENSIONS

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weld neck flange dimensions

Class 2500 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 15 135 30.2 43 21.3 73 According to Schedule 34.9 7 88.9 1.6
3/4 20 140 31.8 51 26.7 79 42.9 7 95.2 1.6
1 25 160 35 57 33.4 89 50.8 7 108 1.6
1 1/4 32 185 38.1 73 42.2 95 63.5 7 130.2 1.6
1 1/2 40 205 44.5 79 48.3 111 73 7 146 1.6
2 50 235 50.9 95 60.3 127 92.1 7 171.4 1.6
2 1/2 65 265 57.2 114 73 143 104.8 7 196.8 1.6
3 80 305 66.7 133 88.9 168 127 7 228.6 1.6
4 100 355 76.2 165 114.3 190 157.2 7 273 1.6
5 125 420 92.1 203 141.3 229 185.7 7 323.8 1.6
6 150 485 108 235 168.3 273 215.9 7 368.3 1.6
8 200 550 127 305 219.1 318 269.9 7 438.2 1.6
10 250 675 165.1 375 273 419 323.8 7 539.8 1.6
12 300 760 184.2 441 323.8 464 381 7 619.1 1.6

Class 2500 Weld Neck Flange Stud & Bolt Dimesions

Size in Inch Size in mm No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size Weight in kg
1/2 15 4 3/4 120 7/8 M20 3.3
3/4 20 4 3/4 125 7/8 M20 3.7
1 25 4 7/8 140 1 M24 5.5
1 1/4 32 4 1 150 1 1/8 M27 7.8
1 1/2 40 4 1 1/8 170 1 1/4 M30 11.5
2 50 8 1 180 1 1/8 M27 19
2 1/2 65 8 1 1/8 195 1 1/4 M30 24
3 80 8 1 1/4 220 1 3/8 M33 42.8
4 100 8 1 1/2 255 1 5/8 M39 66
5 125 8 1 3/4 300 1 7/8 M45 111
6 150 8 2 345 2 1/8 M52 173
8 200 12 2 380 2 1/8 M52 264
10 250 12 2 1/2 490 2 5/8 M64 490
12 300 12 2 3/4 540 2 7/8 M72 695