API 5L also has a clear requirement on the physical tolerance for manufacturing LSAW Steel Pipes. Below is the tolerance for outside diameter and wall thickness. PRIME STEEL PIPE only supply the API LSAW Steel Pipe strictly accordance with the standard, our invested factory is API and ISO qualified.
| Standard |
Out Diameter |
Tolerance of Pipe End |
Tolerance of Pipe Body |
| API 5L |
219.1～273.1 |
+1.6mm, -0.4mm |
±0.75% |
|
274.0～320 |
+2.4mm, -0.8mm |
±0.75% |
|
|
323.9～457 |
+2.4mm, -0.8mm |
±0.75% |
|
|
508 |
+2.4mm, -0.8mm |
±0.75% |
|
|
559～610 |
+2.4mm, -0.8mm |
±0.75% |
| Standard |
Grade |
Out Diameter |
Wall Thickness |
| API 5L | A |
219.1～457 |
+15%, -12.5% |
| B |
508～610 |
+17.5%, -12.5% |
|
| X42-X80 |
508～610 |
+19.5%, -8% |