Dimensions Male-Female and Tongue & Groove flanges ASME B16.5
Large Male and Female Flanges
1 / 4
Small Male and Female Flanges
2 / 4
Large Tongue and Groove Flanges
3 / 4
Small Tongue and Groove Flanges
4 / 4
| NPS | R | S | T | U | W | X | Y | Z |
| 1/2 | 35.05 | 18.28 | 35.05 | 25.4 | 36.57 | 19.81 | 36.57 | 23.87 |
| 3/4 | 42.92 | 23.87 | 42.92 | 33.27 | 44.45 | 25.4 | 44.45 | 31.75 |
| 1 | 50.8 | 30.22 | 47.75 | 38.1 | 52.32 | 31.75 | 49.27 | 36.57 |
| 1¼ | 63.5 | 38.1 | 57.15 | 47.75 | 65.02 | 39.62 | 58.67 | 45.97 |
| 1½ | 73.15 | 44.45 | 63.5 | 53.84 | 74.67 | 45.97 | 65.02 | 52.32 |
| 2 | 91.94 | 57.15 | 82.55 | 73.15 | 93.72 | 58.67 | 84.07 | 71.37 |
| 2½ | 104.64 | 68.32 | 95.25 | 85.85 | 106.42 | 69.85 | 96.77 | 84.07 |
| 3 | 127 | 84.07 | 117.34 | 107.95 | 128.52 | 85.85 | 119.12 | 106.42 |
| 3½ | 139.7 | 96.77 | 130.04 | 120.65 | 141.22 | 98.55 | 131.82 | 119.12 |
| 4 | 157.22 | 109.47 | 144.52 | 131.82 | 158.75 | 111.25 | 146.05 | 130.04 |
| 5 | 185.67 | 136.65 | 172.97 | 160.27 | 187.45 | 138.17 | 174.75 | 158.75 |
| 6 | 215.9 | 162.05 | 203.2 | 190.5 | 217.42 | 163.57 | 204.72 | 188.97 |
| 8 | 269.74 | 212.85 | 254 | 238.25 | 271.52 | 214.37 | 255.52 | 236.47 |
| 10 | 323.85 | 266.7 | 304.8 | 285.75 | 325.37 | 268.22 | 306.32 | 284.22 |
| 12 | 381 | 317.5 | 361.95 | 342.9 | 382.52 | 319.02 | 363.47 | 341.37 |
| 14 | 412.75 | 349.25 | 393.7 | 374.65 | 414.27 | 350.77 | 395.22 | 373.12 |
| 16 | 469.9 | 400.05 | 447.54 | 425.45 | 471.42 | 401.57 | 449.32 | 423.92 |
| 18 | 533.4 | 450.85 | 511.04 | 488.95 | 534.92 | 452.37 | 512.82 | 487.42 |
| 20 | 584.2 | 501.65 | 558.8 | 533.4 | 585.72 | 503.17 | 560.32 | 531.87 |
| 24 | 692.15 | 603.25 | 666.75 | 641.35 | 693.67 | 604.77 | 668.27 | 639.82 |
Dimensions are in millimeters unless otherwise indicated.
LEGENDA
R - Large Male and Large Tongue
S - Small Male
T - Small Tongue
U - ID of Large and Small Tongue
W - Large Female and Large Groove
X - Small Female
Y - Small Groove
Z - ID of Large and Small Groove
Notes..
- Regular facing height (rf) for Class 150 and Class 300 flanges is 1.65 millimeters (1/16in) and included in the minimum flange thickness. Facing height for Class 400, 600, 900, 1500, and 2500 is 6.35 millimeters (1/4in), and not included in minimum flange thickness dimensions.
- Depth of Groove and Female is 4.82 millimeters (0.19in).
- Large Male and Female. The finished height of the male face shall be the greater of the wall thickness of the pipe used or 6.35 mm (1/4in.). The thickness of lap that remains after machining the female face shall be no less than the nominal wall thickness of pipe used.
- Tongue and Groove. The thickness of the lap remaining after machining the tongue or groove face shall be no less than the nominal wall thickness of the pipe used.
- Tongue and Groove and Small Male and Female. The gasket contact surface finish shall not exceed 3.2 μm (125 μin.) roughness.