API 5L X42 Pipe
High-Strength API 5L X42 PSL1 & PSL2 Line Pipe
API 5L X42 Pipe (also referred to as L290 Pipe) is a high-strength carbon steel grade utilized extensively for oil and gas transmission. The "42" denotes a minimum yield strength of 42,100 psi. These pipes offer superior mechanical properties compared to Grade B and are designed for high-pressure environments, available in both seamless and welded configurations (ERW, LSAW, SSAW).
Technical Specifications
| Feature | Details |
|---|---|
| Standard | API 5L / ISO 3183 / ASTM A106/A53 |
| Grade | X42 (L290) / PSL1 / PSL2 |
| Size Range | 2" to 24" (Seamless), up to 60" (Welded) |
| Wall Thickness | SCH 10 to SCH 160, STD, XS, XXS |
| Length | SRL, DRL, Fixed Length (Up to 12m) |
| Coating | FBE, 3PE, Galvanized, Black Vanish |
Mechanical Properties
| Property | X42 (PSL1) | X42 (PSL2) |
|---|---|---|
| Min Yield Strength | 42,100 psi (290 MPa) | 42,100 psi (290 MPa) |
| Max Yield Strength | None | 71,800 psi (495 MPa) |
| Min Tensile Strength | 60,200 psi (415 MPa) | 60,200 psi (415 MPa) |
| Max Tensile Strength | None | 110,200 psi (760 MPa) |
Chemical Composition (Maximum %)
| Element | PSL1 (X42) | PSL2 (X42) |
|---|---|---|
| Carbon (C) | 0.28% | 0.24% |
| Manganese (Mn) | 1.30% | 1.30% |
| Phosphorus (P) | 0.030% | 0.025% |
| Sulphur (S) | 0.030% | 0.015% |
| Silicon (Si) | - | 0.45% |
| Titanium (Ti) | 0.04% | 0.04% |
| Vanadium (V) | 0.06% | 0.06% |
Features and Benefits of API 5L X42 Pipe
- Enhanced Yield Strength suitable for mid-to-high pressure lines
- Full compliance with NACE MR0175 for sour gas environments
- Available with Charpy V-Notch (CVN) testing for PSL2
- Excellent welding characteristics for field installations
- Cost-effective balance between weight and pressure resistance
- High fracture toughness and internal pressure durability
- Compatible with 3PE and FBE external coatings
- Wide range of thickness and diameter availability
Applications & Uses
Natural Gas
Extensively used in long-distance gas gathering and transmission pipeline systems.
Offshore Piping
Preferred for subsea pipelines where higher yield strength and corrosion resistance are vital.
High Pressure
Used in industrial steam and power generation plants for high-pressure fluid transfer.