Tolerance of butt welding fittings ASME B16.9
Tolerance of butt welding fittings ANSI/ASME B16.9
Tolerance of butt welding fittings ASME B16.9
| All Fittings[Note(1) and (2)] | Center-to-End Diamensions | Overall Length of Reducers and Lap Joint Stub Ends,F,H | Overall Length of Caps, E | 180-deg Returns | ||||||
| Nominal Pipe Size(NPS) | DN | Outside Diameter at Bevel,D[Note(3) and (4)] | Inside Diameter at End [Note(3) and (5)] | 90-deg and 45-deg Long and Short Radius Elbows and Tees. A,B,C,M | 3D Radius Elbows, A,B | Center-to-Center Dimension, O | Back-to-Face Demensoin, K | Alignment of Ends, U | ||
| 1/2to2 1/2 | 15-65 | +1.6-0.8 | 0.8 | 2 | 3 | 2 | 3 | 6 | 6 | 1 |
| 3to3 1/2 | 80-90 | 1.6 | 1.6 | 2 | 3 | 2 | 3 | 6 | 6 | 1 |
| 4 | 100 | 1.6 | 1.6 | 2 | 3 | 2 | 3 | 6 | 6 | 1 |
| 5to8 | 125-200 | +2.4 -1.6 | 1.6 | 2 | 3 | 2 | 6 | 6 | 6 | 1 |
| 10to18 | 250-450 | +4.0 -3.2 | 3.2 | 2 | 3 | 2 | 6 | 10 | 6 | 2 |
| 20to24 | 500-600 | +6.4 -4.8 | 4.8 | 2 | 3 | 2 | 6 | 10 | 6 | 2 |
| 26to30 | 650-750 | +6.4 -4.8 | 4.8 | 3 | 6 | 5 | 10 | … | … | … |
| 32to48 | 800-1200 | +6.4 -4.8 | 4.8 | 5 | 6 | 5 | 10 | … | … | … |
| All Fittings[Note(1) and (2)] | Center-to-End Diamensions | Nominal Pipe Size(NPS) | DN | Angularity Tolerance | ||||||
| Nominal Pipe Size(NPS) | DN | Outside Diameter at Bevel,D[Note(3) and (4)] | Inside Diameter at End [Note(3) and (5)] | Outside Diameter of Lap,G | Fillet Radius of Lap,R | Lap Thickness | Off Angle,Q | Off Plane,P | ||
| 1/2to2 1/2 | 15-65 | +1.6-0.8 | 0.8 | +0,-1 | +0,-1 | +1.6,-0 | 1/2to4 | 15-100 | 1 | 2 |
| 3to3 1/2 | 80-90 | 1.6 | 1.6 | +0,-1 | +0,-1 | +1.6,-0 | 5to8 | 125-200 | 2 | 4 |
| 4 | 100 | 1.6 | 1.6 | +0,-1 | +0,-2 | +1.6,-0 | 10to12 | 250-300 | 3 | 5 |
| 5to8 | 125-200 | +2.4 -1.6 | 1.6 | +0,-1 | +0,-2 | +1.6,-0 | 14to16 | 350-400 | 3 | 6 |
| 10to18 | 250-450 | +4.0 -3.2 | 3.2 | +0,-2 | +0,-2 | +3.2,-0 | 18to24 | 450-600 | 4 | `10 |
| 20to24 | 500-600 | +6.4 -4.8 | 4.8 | +0,-2 | +0,-2 | +3.2,-0 | 26to30 | 650-750 | 5 | 10 |
| 26to30 | 650-750 | +6.4 -4.8 | 4.8 | … | … | … | 32to42 | 800-1050 | 5 | 13 |
| 32to48 | 800-1200 | +6.4 -4.8 | 4.8 | … | … | … | 44to48 | 1100-1200 | 5 | 19 |
| GENERAL NOTES: | ||||||||||
| (a)All dimensions are in mm. | ||||||||||
| (b)Tolerances are equal plus and minus except as noted. | ||||||||||
| NOTES: | ||||||||||
| (1)The inside diameter and the nominal wall thickness at ends are to be specified by the purchaser. | ||||||||||
| (2)A minimum wall thickness of 87.5% applies unless the purchaser specifies a different wall thickness toletance. | ||||||||||
| (3)Out-of-round is the sum of absolute values of plus and minus tolerances. | ||||||||||
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