API 5L X52 Pipe
High-Strength API 5L X52 (L360) Line Pipe
API 5L X52 Pipe (L360) is one of the most widely used high-yield grades for the transport of liquid and gaseous hydrocarbons. With a minimum yield strength of 52,200 psi (360 MPa), it offers a significant increase in strength over Grade B and X42. This grade provides an excellent cost-to-strength ratio, making it the industry standard for major onshore and offshore pipeline projects requiring high internal pressure resistance.
Technical Specifications
| Feature | Details |
|---|---|
| Standard | API 5L (46th Edition) / ISO 3183 |
| Grade | X52 or L360 / PSL1 / PSL2 |
| Size Range | Seamless: 21.3mm - 660mm | Welded: Up to 2540mm |
| Schedules | SCH 20, SCH 40, SCH 80, SCH 120, SCH 160 |
| Length | 6m, 12m, Single Random, Double Random |
| End Protection | Plastic Caps, Steel Protectors, Beveled |
Mechanical Properties
| Property | X52 (PSL1) | X52 (PSL2) |
|---|---|---|
| Min Yield Strength | 52,200 psi (360 MPa) | 52,200 psi (360 MPa) |
| Max Yield Strength | None | 76,900 psi (530 MPa) |
| Min Tensile Strength | 66,700 psi (460 MPa) | 66,700 psi (460 MPa) |
| Max Tensile Strength | None | 110,200 psi (760 MPa) |
Chemical Composition (Maximum %)
| Element | PSL1 (X52) | PSL2 (X52) |
|---|---|---|
| Carbon (C) | 0.28% | 0.22% |
| Manganese (Mn) | 1.40% | 1.40% |
| Phosphorus (P) | 0.030% | 0.025% |
| Sulphur (S) | 0.030% | 0.015% |
| Silicon (Si) | - | 0.45% |
| Niobium (Nb) | 0.05% | 0.05% |
| Vanadium (V) | 0.06% | 0.06% |
Features and Benefits of API 5L X52 Pipe
- Superior pressure handling capabilities compared to Grade B and X42
- Excellent toughness at low temperatures (PSL2 certified)
- Low carbon content ensures easy weldability and field joinery
- Ideal for sour service environments with NACE MR0175 compliance
- High resistance to longitudinal and circumferential stress
- Strict dimensional control through advanced manufacturing processes
- Compatible with high-build epoxy and 3-layer polyethylene coatings
- Suitable for extreme geological conditions including seismic areas
Applications & Uses
Onshore Lines
The primary choice for domestic gas distribution networks and oil gathering lines.
Offshore Projects
Used in platform piping and subsea pipelines due to high fatigue resistance.
Sour Service
Optimized for pipelines carrying crude oil containing H2S (Sour Gas) in PSL2 grade.