API 5L Grade X56 ERW Steel Pipe
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API 5L X56 specifications cover welded pipes, ERW pipes and seamless pipes, which are widely used in oil and gas transportation.
There are two product grades of X56 tubes, namely PSL1 and PSL2. API 5L X56 PSL2 and PLS1 grades are suitable for welded pipe. However, for API 5L X56 PSL2 material, the steel should be quenched and melted following fine grain practices. In addition, plates or coils of Class X56 PSL2 pipe shall not contain any repair welds.
API 5L X56 (L390 pipe) has excellent mechanical properties. Its minimum yield strength is as high as 46,400 Psi or 320 MPa, which is significantly better than other common pipe materials. At the same time, its tensile strength has also reached 71,100 Psi and 490 Mpa, ensuring the stability and reliability of the pipeline during use.
As a commonly used material grade in the oil and gas industry, the superior properties of API 5L X56 welded steel pipe make it ideal for critical applications. Compared with other common pipe materials, such as X42, X46, X52 and Grade B, API 5L X56 straight seam steel pipe shows more superior performance.
| API 5L-PSL 1 Mechanical Properties | |||
|---|---|---|---|
| Grade | Yield Strength Mpa | Tensile Strength Mpa | Elongation |
| B | 245 | 415 | c |
| X56 | 390 | 490 | c |
| API 5L-PSL 2 Mechanical Properties | ||||||
|---|---|---|---|---|---|---|
| Grade | Yield Strength Mpa | Tensile Strength Mpa | Raito | Elongation | ||
| min | max | min | max | max | min | |
| BN | 245 | 450 | 415 | 655 | 0.93 | f |
| BQ | ||||||
| X56N | 390 | 545 | 490 | 760 | 0.93 | f |
API 5L Grade X56 Lsaw Pipe

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