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Dimensional Tolerances (ASME)
ASME B16.9, B16.28
| Pipe Size | All Fittings | 90 & 45 Elbows and Tees | Reducers and Lap Joint Stub ends | Caps | |||||||
| Outside Diameter at Bevel, D (1) | Inside Diameter at End (1) | Wall Thickness t | Center-to-End Dimensions A,B,C,M | Overall Length, F,H | |||||||
| Overall Length, E | |||||||||||
| IN | MM | IN | MM | IN | MM | IN | MM | IN | MM | ||
| ½ ~ 2½ | +0.06 | +1.6 | ±0.03 | ±0.8 | Not Less Than 87.5% of Nominal Thickness | ±0.06 | ±2 | ±0.06 | ±2 | ±0.12 | ±3 |
| -0.03 | -0.8 | ||||||||||
| 3 ~ 2½ | ±0.06 | ±1.6 | ±0.06 | ±1.6 | |||||||
| 4 | |||||||||||
| 5 ~ 8 | +0.09 | +2.4 | ±0.25 | ±6 | |||||||
| -0.06 | -1.6 | ||||||||||
| 10 ~ 18 | +0.16 | +4.0 | ±0.12 | ±3.2 | ±0.09 | ±0.09 | |||||
| -0.12 | -3.2 | ||||||||||
| 20 ~ 24 | +0.25 -0.19 | +6.4 -4.8 | ±0.19 | ±4.8 | |||||||
| 26 ~ 30 | ±0.12 | ±3 | ±0.19 | ±5 | ±0.38 | ±10 | |||||
| 32 ~ 48 | ±0.19 | ±5 | |||||||||
| Pipe Size | Lap Joint Stub Ends (2) | 180 Return Bends | ||||||||||
| Outside Diameter of Lap, G | Lap Thickness | Fillet Radius of Lap, R | Center-to-Center Dimension, O | Back-to- Face Dimension, K | Alignment of Ends, U | |||||||
| IN | MM | IN | MM | IN | MM | IN | MM | IN | MM | IN | MM | |
| ½ ~ 2½ | +0 -0.03 | +0 -1 | +0.06 -0 | +1.6 -0 | +0 -0.03 | +0 -1 | ±0.25 | ±6 | ±0.25 | ±6 | ±0.03 | ±1 |
| 3 ~ 2½ | ||||||||||||
| 4 | +0 -0.06 | +0 -2 | ||||||||||
| 5 ~ 8 | ||||||||||||
| 10 ~ 18 | +0 -0.06 | +0 -2 | +0.12 -0 | +3.2 -0 | ±0.38 | ±10 | ±0.06 | ±2 | ||||
| 20 ~ 24 | ||||||||||||
| Pipe Size | Off Angle, Q | Off Plane, P | ||
| IN | MM | IN | MM | |
| ½ ~ 4 | ± 0.03 | ± 1 | ± 0.06 | ± 2 |
| 5 ~ 8 | ± 0.06 | ± 2 | ± 0.12 | ± 4 |
| 10 ~ 12 | ± 0.09 | ± 0.19 | ± 5 | |
| 14 ~ 16 | ± 3 | ± 0.25 | ± 6 | |
| 18 ~ 24 | ± 0.12 | ± 4 | ± 0.38 | ± 10 |
| 26 ~ 30 | ± 0.19 | ± 5 | ||
| 32 ~ 42 | ± 0.50 | ± 13 | ||
| 44 ~ 48 | ± 0.75 | ± 19 | ||
NOTES:
(1) Out-of-round is the sum of absolute values of plus and minus tolerances.
(2) Outside diameter of barrel see the table on page 15.