Socket Weld Flanges
ANSI / ASME / ASA B16.5 – Class 150 Socket Weld Flanges Dimensions
| NPS |
Outside Diameter O (mm) |
Flange Thickness C (mm) |
Raised Face Diameter R (mm) |
Hub Diameter X (mm) |
Length Thru Hub Y (mm) |
Bore Diameter B (mm) |
Socket Depth D (mm) |
No. of Holes |
Bolt Hole Diameter (mm) |
Approx. Weight (kg) |
| ½" | 88.9 | 11.2 | 35.1 | 30.2 | 15.7 | 22.4 | 9.7 | 4 | 15.7 | 0.5 |
| ¾" | 98.6 | 12.7 | 42.9 | 38.1 | 15.7 | 27.7 | 11.2 | 4 | 15.7 | 1 |
| 1" | 108 | 14.2 | 50.8 | 49.3 | 17.5 | 34.5 | 12.7 | 4 | 15.7 | 1 |
| 1¼" | 117.3 | 15.7 | 63.5 | 58.7 | 20.6 | 43.2 | 14.2 | 4 | 15.7 | 1 |
| 1½" | 127 | 17.5 | 73.2 | 65 | 22.4 | 49.5 | 15.7 | 4 | 15.7 | 1 |
| 2" | 152.4 | 19.1 | 91.9 | 77.7 | 25.4 | 62 | 17.5 | 4 | 19.1 | 2 |
| 2½" | 177.8 | 22.4 | 104.6 | 90.4 | 28.4 | 74.7 | 19.1 | 4 | 19.1 | 3 |
| 3" | 190.5 | 23.9 | 127 | 108 | 30.2 | 90.7 | 20.6 | 4 | 19.1 | 4 |
| 3½" | 215.9 | 23.9 | 139.7 | 122.2 | 31.8 | 103.4 | — | 8 | 19.1 | 5 |
| 4" | 228.6 | 23.9 | 157.2 | 134.9 | 33.3 | 116.1 | — | 8 | 19.1 | 6 |
| 5" | 254 | 23.9 | 185.7 | 163.6 | 36.6 | 143.8 | — | 8 | 22.4 | 7 |
| 6" | 279.4 | 25.4 | 215.9 | 192 | 39.6 | 170.7 | — | 8 | 22.4 | 9 |
| 8" | 342.9 | 28.4 | 269.7 | 246.1 | 44.5 | 221.5 | — | 8 | 22.4 | 14 |
| 10" | 406.4 | 30.2 | 323.9 | 304.8 | 49.3 | 276.4 | — | 12 | 25.4 | 20 |
| 12" | 482.6 | 31.8 | 381 | 365.3 | 55.6 | 327.2 | — | 12 | 25.4 | 29 |
| 14" | 533.4 | 35.1 | 412.8 | 400.1 | 57.2 | 359.2 | — | 12 | 28.4 | 41 |
| 16" | 596.9 | 36.6 | 469.9 | 457.2 | 63.5 | 410.5 | — | 16 | 28.4 | 44 |
| 18" | 635 | 39.6 | 533.4 | 505 | 68.3 | 461.8 | — | 16 | 31.8 | 59 |
| 20" | 698.5 | 42.9 | 584.2 | 558.8 | 73.2 | 513.1 | — | 20 | 31.8 | 75 |
| 24" | 812.8 | 47.8 | 692.2 | 663.4 | 82.6 | 616 | — | 20 | 35.1 | 100 |
Socket Weld Flanges Flanges
ANSI / ASME / ASA B16.5 Class 300 Socket Weld Flange (RF) Dimensions
| NPS |
Outside Diameter O (mm) |
Flange Thickness C (mm) |
Raised Face Diameter R (mm) |
Hub Diameter X (mm) |
Length Thru Hub Y (mm) |
Bore Diameter B (mm) |
Socket Depth D (mm) |
No. of Holes |
Bolt Hole Diameter (mm) |
Approx. Weight (kg) |
| ½" | 95.3 | 14.2 | 35.1 | 38.1 | 22.4 | 22.4 | 9.7 | 4 | 15.7 | 1 |
| ¾" | 117.3 | 15.7 | 42.9 | 47.8 | 25.4 | 27.7 | 11.2 | 4 | 19.1 | 1 |
| 1" | 124 | 17.5 | 50.8 | 53.8 | 26.9 | 34.5 | 12.7 | 4 | 19.1 | 1 |
| 1¼" | 133.4 | 19.1 | 63.5 | 63.5 | 26.9 | 43.2 | 14.2 | 4 | 19.1 | 2 |
| 1½" | 155.4 | 20.6 | 73.2 | 69.9 | 30.2 | 49.5 | 15.7 | 4 | 22.4 | 3 |
| 2" | 165.1 | 22.4 | 91.9 | 84.1 | 33.3 | 62 | 17.5 | 8 | 19.1 | 3 |
| 2½" | 190.5 | 25.4 | 104.6 | 100.1 | 38.1 | 74.7 | 19.1 | 8 | 22.4 | 5 |
| 3" | 209.6 | 28.4 | 127 | 117.3 | 42.9 | 90.7 | 20.6 | 8 | 22.4 | 6 |
| 3½" | 228.6 | 30.2 | 139.7 | 133.4 | 44.5 | 103.4 | — | 8 | 22.4 | 8 |
| 4" | 254 | 31.8 | 157.2 | 146.1 | 47.8 | 116.1 | — | 8 | 22.4 | 10 |
| 5" | 279.4 | 35.1 | 185.7 | 177.8 | 50.8 | 143.8 | — | 8 | 22.4 | 13 |
| 6" | 317.5 | 36.6 | 215.9 | 206.2 | 52.3 | 170.7 | — | 12 | 22.4 | 18 |
| 8" | 381 | 41.1 | 269.7 | 260.4 | 62 | 221.5 | — | 12 | 25.4 | 26 |
| 10" | 444.5 | 47.8 | 323.9 | 320.5 | 66.5 | 276.4 | — | 16 | 28.4 | 37 |
| 12" | 520.7 | 50.8 | 381 | 374.7 | 73.2 | 327.2 | — | 16 | 31.8 | 52 |
| 14" | 584.2 | 53.8 | 412.8 | 425.5 | 76.2 | 359.2 | — | 20 | 31.8 | 75 |
| 16" | 647.7 | 57.2 | 469.9 | 482.6 | 82.6 | 410.5 | — | 20 | 35.1 | 86 |
| 18" | 711.2 | 60.5 | 533.4 | 533.4 | 88.9 | 461.8 | — | 24 | 35.1 | 113 |
| 20" | 774.7 | 63.5 | 584.2 | 587.2 | 95.3 | 513.1 | — | 24 | 35.1 | 143 |
| 24" | 914.4 | 69.9 | 692.2 | 701.5 | 106.4 | 616 | — | 24 | 41.1 | 215 |
