Weld Neck Flanges
ANSI / ASME / ASA B16.5 – Class 150 Weld Neck Flange (WN-RF)
| Nominal Pipe Size (Inch) |
Pipe OD (mm) |
Outside Diameter A (mm) |
Inside Diameter B (mm) |
Flange Thickness C (mm) |
Overall Length D (mm) |
Diameter at Weld Bevel E (mm) |
Hub Diameter F (mm) |
Face Diameter G (mm) |
PCD – Bolt Circle (mm) |
No. of Holes |
Bolt Hole Dia (mm) |
Weight (kg) |
| 1/2" | 21.30 | 88.90 | 15.70 | 11.20 | 47.80 | 21.30 | 30.20 | 35.00 | 60.45 | 4 | 15.70 | 0.48 |
| 3/4" | 26.70 | 98.60 | 20.80 | 12.70 | 52.30 | 26.70 | 38.10 | 42.90 | 69.85 | 4 | 15.70 | 0.71 |
| 1" | 33.40 | 108.00 | 26.70 | 14.20 | 55.60 | 33.50 | 49.30 | 50.80 | 79.25 | 4 | 15.70 | 1.01 |
| 1¼" | 42.20 | 117.30 | 35.10 | 15.70 | 57.15 | 42.20 | 58.70 | 63.50 | 88.90 | 4 | 15.70 | 1.33 |
| 1½" | 48.30 | 127.00 | 40.90 | 17.50 | 62.00 | 48.30 | 65.00 | 73.15 | 98.60 | 4 | 15.70 | 1.72 |
| 2" | 60.30 | 152.40 | 52.60 | 19.10 | 63.50 | 60.45 | 77.70 | 91.90 | 120.70 | 4 | 19.10 | 2.58 |
| 2½" | 73.00 | 177.80 | 62.70 | 22.40 | 69.85 | 73.15 | 90.40 | 104.60 | 139.70 | 4 | 19.10 | 4.11 |
| 3" | 88.90 | 190.50 | 78.00 | 23.90 | 69.85 | 88.90 | 108.00 | 127.00 | 152.40 | 4 | 19.10 | 4.92 |
| 4" | 114.30 | 228.60 | 102.40 | 23.90 | 76.20 | 114.30 | 134.90 | 157.20 | 190.50 | 8 | 19.10 | 6.84 |
| 6" | 168.30 | 279.40 | 154.20 | 25.40 | 88.90 | 168.40 | 192.00 | 215.90 | 241.30 | 8 | 22.40 | 10.60 |
| 8" | 219.10 | 342.90 | 202.70 | 28.40 | 101.60 | 219.20 | 246.10 | 269.70 | 298.50 | 8 | 22.40 | 17.60 |
| 10" | 273.00 | 406.40 | 254.50 | 30.20 | 101.60 | 273.00 | 304.80 | 323.80 | 362.00 | 12 | 25.40 | 24.00 |
| 12" | 323.80 | 482.60 | 304.80 | 31.75 | 114.30 | 323.80 | 365.30 | 381.00 | 431.80 | 12 | 25.40 | 36.50 |
| 14" | 355.60 | 533.40 | — | 35.10 | 127.00 | 355.60 | 400.10 | 412.70 | 476.30 | 12 | 28.40 | 48.40 |
| 16" | 406.40 | 596.90 | 366.00 | 36.60 | 127.00 | 406.40 | 475.20 | 469.90 | 539.80 | 16 | 28.40 | 60.60 |
| 18" | 457.20 | 635.00 | 396.00 | 39.60 | 139.70 | 457.20 | 505.00 | 533.40 | 577.90 | 16 | 31.75 | 68.30 |
| 20" | 508.00 | 698.50 | 429.00 | 42.90 | 144.50 | 508.00 | 558.80 | 584.20 | 635.00 | 20 | 31.75 | 84.50 |
| 24" | 609.60 | 812.80 | 478.00 | 47.80 | 152.40 | 609.60 | 663.40 | 692.10 | 749.30 | 20 | 35.10 | 115.00 |
Weld Neck Flanges
ANSI / ASME / ASA B16.5 – Class 300 Weld Neck Flange (WN-RF)
| Nominal Pipe Size (Inch) |
Pipe OD (mm) |
Outside Diameter A (mm) |
Inside Diameter B (mm) |
Flange Thickness C (mm) |
Overall Length D (mm) |
Diameter at Weld Bevel E (mm) |
Hub Diameter F (mm) |
Face Diameter G (mm) |
PCD – Bolt Circle (mm) |
No. of Holes |
Bolt Hole Dia (mm) |
Weight (kg) |
| 1/2" | 21.30 | 95.20 | 15.70 | 14.20 | 52.30 | 21.30 | 38.10 | 35.00 | 66.55 | 4 | 15.70 | 0.75 |
| 3/4" | 26.70 | 117.30 | 20.80 | 15.70 | 57.15 | 26.70 | 47.70 | 42.90 | 82.50 | 4 | 19.00 | 1.26 |
| 1" | 33.40 | 123.90 | 26.70 | 17.50 | 62.00 | 33.50 | 53.80 | 50.80 | 88.90 | 4 | 19.00 | 1.52 |
| 1¼" | 42.20 | 133.30 | 35.10 | 19.00 | 65.00 | 42.20 | 63.50 | 63.50 | 98.50 | 4 | 19.00 | 2.03 |
| 1½" | 48.30 | 155.40 | 40.90 | 20.60 | 68.30 | 48.30 | 69.85 | 73.15 | 114.30 | 4 | 22.30 | 2.89 |
| 2" | 60.30 | 165.10 | 52.60 | 22.30 | 69.85 | 60.45 | 84.00 | 91.90 | 127.00 | 8 | 19.00 | 3.40 |
| 2½" | 73.00 | 190.50 | 62.70 | 25.40 | 76.20 | 73.15 | 100.00 | 104.60 | 149.30 | 8 | 22.30 | 5.17 |
| 3" | 88.90 | 209.50 | 78.00 | 28.40 | 79.25 | 88.90 | 117.30 | 127.00 | 168.10 | 8 | 22.30 | 6.93 |
| 4" | 114.30 | 254.00 | 102.40 | 31.70 | 85.80 | 114.30 | 146.00 | 157.20 | 200.10 | 8 | 22.30 | 11.20 |
| 5" | 141.30 | 279.40 | 128.30 | 35.00 | 98.50 | 141.20 | 177.80 | 185.70 | 234.90 | 8 | 22.30 | 15.10 |
| 6" | 168.30 | 317.50 | 154.20 | 36.50 | 98.50 | 168.40 | 206.20 | 215.90 | 269.70 | 12 | 22.30 | 19.10 |
| 8" | 219.10 | 381.00 | 202.70 | 41.10 | 111.20 | 219.20 | 260.30 | 269.70 | 330.20 | 12 | 25.40 | 29.90 |
| 10" | 273.00 | 444.50 | 254.50 | 47.70 | 117.30 | 273.00 | 320.50 | 323.80 | 387.30 | 16 | 28.40 | 42.70 |
| 12" | 323.80 | 520.70 | 304.80 | 50.80 | 130.00 | 323.80 | 374.60 | 381.00 | 450.80 | 16 | 31.70 | 61.80 |
| 14" | 355.60 | 584.20 | — | 53.80 | 142.70 | 355.60 | 425.40 | 412.70 | 514.30 | 20 | 31.70 | 85.80 |
| 16" | 406.40 | 647.70 | 366.00 | 57.15 | 146.00 | 406.40 | 482.60 | 469.90 | 571.50 | 20 | 35.00 | 106.00 |
| 18" | 457.20 | 711.20 | 396.00 | 60.45 | 158.70 | 457.20 | 533.40 | 533.40 | 628.60 | 24 | 35.00 | 131.00 |
| 20" | 508.00 | 774.70 | 429.00 | 63.50 | 162.00 | 508.00 | 587.20 | 584.20 | 685.80 | 24 | 35.00 | 158.00 |
| 24" | 609.60 | 914.40 | 478.00 | 69.85 | 168.10 | 609.60 | 701.50 | 692.10 | 812.80 | 24 | 41.10 | 230.00 |
