API 5L X65 Pipe
High-Strength API 5L X65 (L450) PSL2 Line Pipe
API 5L X65 Pipe, also known as L450, is a high-performance carbon steel grade widely utilized in the oil and gas industry for conveying hydrocarbons across long distances. With a minimum yield strength of 65,300 psi (450 MPa), it is optimized for projects requiring high fracture toughness and resistance to severe environmental conditions. X65 pipes are primarily supplied in PSL2 to meet strict mechanical and chemical tolerances for subsea and deep-water applications.
Technical Specifications
| Feature | Details |
|---|---|
| Standard | API SPEC 5L / ISO 3183 / EN 10208 |
| Grade | X65 or L450 / PSL1 / PSL2 |
| Outer Diameter | 2" to 28" (Seamless), 24" to 80" (Welded) |
| Wall Thickness | SCH 20, 40, 80, 120, 160 up to 100mm |
| Manufacturing Type | Seamless, LSAW, SSAW, ERW, HFW |
| External Coating | FBE, 2-Layer / 3-Layer PE, 3-Layer PP |
Mechanical Properties
| Property | X65 (PSL1) | X65 (PSL2) |
|---|---|---|
| Min Yield Strength | 65,300 psi (450 MPa) | 65,300 psi (450 MPa) |
| Max Yield Strength | None | 87,000 psi (600 MPa) |
| Min Tensile Strength | 77,600 psi (535 MPa) | 77,600 psi (535 MPa) |
| Max Tensile Strength | None | 110,200 psi (760 MPa) |
Chemical Composition (Maximum %)
| Element | PSL1 (X65) | PSL2 (X65) |
|---|---|---|
| Carbon (C) | 0.28% | 0.22% |
| Manganese (Mn) | 1.45% | 1.45% |
| Phosphorus (P) | 0.030% | 0.025% |
| Sulphur (S) | 0.030% | 0.015% |
| Silicon (Si) | - | 0.45% |
| Niobium (Nb) | 0.05% | 0.05% |
| Titanium (Ti) | 0.06% | 0.06% |
Features and Benefits of API 5L X65 Pipe
- Enhanced Yield Strength allows for reduced wall thickness and material savings
- Superior fracture toughness for critical high-pressure pipelines
- Optimized chemical composition for excellent field weldability
- Full traceability and compliance with NACE MR0175 for sour service
- High resistance to HIC (Hydrogen Induced Cracking) for safety in corrosive environments
- Robust performance in seismic zones and deep-water offshore projects
- Precision manufacturing ensuring tight dimensional tolerances
- Long operational lifespan with advanced anti-corrosion coating compatibility
Applications & Uses
Deep Subsea
Engineered for high-pressure deep-sea pipelines requiring extreme fatigue resistance.
Main Trunklines
Ideal for cross-border trunklines conveying high volumes of oil and natural gas.
Chemical Slurry
Reliable for the transportation of abrasive and corrosive chemical slurries in heavy industry.