API 5L
API 5L is the international specification for line pipe in oil, gas and water transport – from Grade B up to high-strength grades such as X60, X65 and X70.
Application & properties
API 5L is the international specification for line pipe in oil, gas and water transport – from Grade B up to high-strength grades such as X60, X65 and X70.
- Oil and gas pipelines
- Water and media transport lines
- Trunk and gathering lines
Chemical composition
Typical values in wt.-% per EN standard (heat analysis).
| Element | Content (%) |
|---|---|
| C | ≤ 0.24 |
| Mn | ≤ 1.40 |
| P | ≤ 0.025 |
| S | ≤ 0.015 |
| Type | PSL1 / PSL2 |
| Manufacture | seamless / welded |
Mechanical properties
Typical values at room temperature per EN standard.
| Property | Value |
|---|---|
| Yield strength SMYS | 245–485 MPa (Grade B–X70) |
| Tensile strength Rm | ≥ 415–570 MPa |
| Grades | B · X42 · X52 · X60 · X65 · X70 |
| Connections | bevelled / plain end |
Standards, equivalents & product forms
| Topic | Detail |
|---|---|
| Standards | API 5L (ISO 3183) |
| ASME/ASTM equivalent | Grade B ~ ASTM A106 B |
| Material no. | Leitungsrohr |
| Short name / aka | Öl- & Gas-Pipeline · Grade B–X70 |
We supply API 5L as pipes, flanges and fittings – seamless or welded, on request with an EN 10204 3.1 / 3.2 mill certificate.
Frequently asked questions about API 5L
What do X52, X60 or X70 mean in API 5L?
The number gives the minimum yield strength (SMYS) in ksi – X52 ≈ 360 MPa, X60 ≈ 415 MPa, X70 ≈ 485 MPa.
What is the difference between PSL1 and PSL2?
PSL2 imposes stricter requirements on chemistry, strength and testing than PSL1.
Does ROHRLINE supply API 5L line pipe?
Yes – seamless or welded in the common grades, on request with EN 10204 3.1 mill certificate.
Request API 5L?
Grade, standard, size, pressure rating and quantity are enough – on request with an EN 10204 3.1 / 3.2 mill certificate. Your quote usually the same day.
All data are typical values per the relevant EN standards for first orientation – without warranty. The applicable standard and the mill certificate of the delivery are decisive.