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The ASTM A 192M / ASME SA-192M belongs to the carbon seamless tubes, which is specially designed for high, middle, low pressure purpose in seamless carbon steel boilers and as super heater tubes.
The tubing sizes and thicknesses usually furnished to this specification are 1⁄2 in. to 7 in. [12.7 to 177.8 mm] outside diameter and 0.085 to 1.000 in. [2.2 to 25.4 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.
Required Mechanical Tests
1. Flattening test - The sample is taken from each end or part of two steel pipes selected from each batch for flattening test.
2. Flaring test - The flaring test is done by intercepting samples from each end or part of two steel pipes selected from each batch. The two steel pipes shall not be used for flattening tests.
3. Hardness test - Brinell or Rockwell hardness test should be done by samples taken from each batch of two steel pipes.
4. Hydrostatic pressure test - Each steel pipe shall be subjected to hydrostatic pressure test, or as an alternative, non-destructive testing can be used when specified by the buyer.
Dimensional Tolerance
|
OD |
WT |
|||
|
OD dimension (mm) |
Allowable deviation (mm) |
Dimension (mm) |
Allowable deviation (mm) |
|
|
Hot-rolled tube |
≤101.6 |
+0.4～-0.8 |
76～168.3 |
+28%～0 |
|
>101.6～168.3 |
+0.4～-1.2 |
|||
|
Cold drawn tube |
- |
+0.1 |
≤38.1 |
+20%～0 |
|
25.4～38.1 |
+0.15 |
|||
|
>38.1～ |
+0.20 |
>38.1 |
+22%～0 |
|
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