Commercial OD/Wall (ASTM B-338)
| Nominal Outside Diameter |
Diameter Tolerance |
Ovality Tolerance |
Wall Tolerance |
| in |
mm |
in |
mm |
Tolerance*
Included in
Diameter
Tolerances |
+/- 10%
Nominal
Wall Thickness
|
| Under 1. |
25.4 excl. |
+/-0.004 |
0.102 |
| 1 to 1.5 |
25.4 to 38.1 excl. |
+/-0.005 |
0.127 |
| 1.5 to 2 |
38.1 to 50.8 excl. |
+/-0.006 |
0.152 |
| 2 to 2.5 |
50.8 to 63.5 excl. |
+/-0.007 |
0.178 |
| 2.5 to 3.5 |
63.5 to 88.9 excl. |
+/-0.010 |
0.254 |
Aerospace OD/Wall (AMS)
| Nominal Outside Diameter, in. |
Diameter Tolerance, in. |
Ovality Tolerance |
Wall Tolerance |
| Over 0.093 to 0.188, incl. |
+0.002/-0.000 |
Tolerance
Included in
Diameter
Tolerances |
+ 10%, - 5% Nominal Wall Thickness for Tubing under 1.500 in. (38.1 mm) Nominal OD
+/- 10% Nominal Wall Thickness for
Tubing over 1.500 in (38.1 mm) Nominal OD |
| Over 0.188 to 0.500, incl. |
+0.003/-0.000 |
| Over 0.500 to 1.000, incl. |
+0.004/-0.000 |
| Over 1.000 to 1.500, incl. |
+0.004/-0.001 |
| Over 1.500 to 2.000, incl. |
+0.005/-0.001 |
| Diameter, mm |
Tolerance, mm |
| Over 2.3 to 4.70, incl. |
+0.05/-0.00 |
| Over 4.7 to 12.50, incl. |
+0.08/-0.00 |
| Over 12.5 to 25.00, incl. |
+0.10/-0.00 |
| Over 25.0 to 37.50, incl. |
+0.10/-0.02 |
| Over 37.5 to 50.0, incl. |
+0.12/-0.02 |
Aerospace OD/ID (AMS/DAN)
| Nominal Outside Diameter, in. |
Diameter Tolerance, in. |
Ovality Tolerance |
Wall Tolerance |
| Over 0.093 to 0.187, incl. |
+0.002/-0.000 |
Tolerance
Included in
Diameter
Tolerances
|
All Tubing 1.500 in.
(38.1 mm) And Under in
Nominal O.D. Shall Have a
Wall Thickness Not Less
Than 95% of Nominal
|
| Over 0.187 to 0.499, incl. |
+0.003/-0.000 |
| Over 0.499 to 0.749, incl. |
+0.004/-0.000 |
| Over 0.749 to 0.999, incl. |
+0.004/-0.001 |
| Over 0.999 to 1.499, incl. |
+0.004/-0.002 |
| Over 1.499 to 1.999, incl. |
+0.005/-0.002 |
| Diameter, mm |
Tolerance, mm |
| Over 2.36 to 4.75, incl. |
+0.05/-0.00 |
| Over 4.75 to 12.67, incl. |
+0.08/-0.00 |
| Over 12.67 to 19.02, incl. |
+0.10/-0.00 |
| Over 19.02 to 25.37, incl. |
+0.10/-0.025 |
| Over 25.37 to 38.07, incl. |
+0.10/-0.05 |
| Over 38.07 to 50.77, incl. |
+0.13/-0.05 |
| Nominal Inside Diameter, in. |
Diameter Tolerance, in. |
| Up to 0.338, incl. |
+0.0015/-0.0015 |
| Over 0.338 to 0.499, incl. |
+0.002/-0.002 |
| Over 0.499 to 0.637, incl. |
+0.0025/-0.0025 |
| Over 0.637 to 0.900, incl. |
+0.003/-0.003 |
| Over 0.900 and over |
+0.004/-0.004 |
| Diameter, mm |
Tolerance, mm |
| Up to 8.59, incl. |
+0.038/-0.038 |
| Over 8.59 to 11.40, incl. |
+0.05/-0.05 |
| Over 11.40 to 17.09, incl. |
+0.064/-0.064 |
| Over 17.09 to 22.86, incl. |
+0.08/-0.08 |
| Over 22.86 and above |
+0.10/-0.10 |
Inside diameter is equal to the nominal OD minus twice the nominal wall