Product Overview –API 5L X42 PSL 2 Line Welded Pipes
API 5L X42 PSL 2 Line Welded Pipes are premium high-strength carbon steel pipeline products designed for critical transmission systems where superior weld quality, enhanced fracture toughness, and stringent quality assurance are essential. Manufactured in accordance with API Specification 5L Product Specification Level 2 (PSL 2), these welded line pipes are widely used for transporting crude oil, natural gas, LNG, hydrogen, petroleum products, water, and other industrial process fluids under demanding operating conditions.
Manufactured using advanced Electric Resistance Welding (ERW) and Longitudinal Submerged Arc Welding (LSAW) technologies, API 5L X42 PSL 2 Line Welded Pipes provide outstanding weld seam integrity, dimensional accuracy, and consistent mechanical performance. Compared with PSL 1, the PSL 2 specification requires tighter chemical composition control, mandatory Charpy V-Notch impact testing, comprehensive non-destructive examination, and full material traceability, ensuring maximum safety and reliability for mission-critical pipeline projects.
These line welded pipes are extensively used in cross-country oil & gas pipelines, LNG terminals, offshore production facilities, petrochemical complexes, petroleum refineries, hydrogen transportation infrastructure, power generation plants, marine engineering, and large-scale industrial processing projects. Available in a wide range of diameters, wall thicknesses, schedules, lengths, and corrosion-resistant coatings, API 5L X42 PSL 2 Line Welded Pipes comply with international pipeline engineering standards.
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Material Specification -API 5L X42 PSL 2 Line Welded Pipes
Technical Specifications –API 5L X42 PSL 2 Line Welded Pipes
| Outside Diameter: | 21.3 mm to 2540 mm |
| Wall Thickness: | SCH 10 to SCH XXS |
| Length: | Single Random, Double Random & Custom Length |
| Pipe Ends: | Plain End, Bevel End, Threaded |
| Delivery Condition | As Welded / Normalized (When Required) |
| Surface Finish: | Bare, Black Painted, Anti-Rust Oil, FBE, 3LPE & 3LPP |
| Pipe Shape: | Round |
| Manufacturing: | ERW / LSAW Welded |
| Available Sizes: | ½", ¾", 1", 1¼", 1½", 2", 2½", 3", 4", 5", 6", 8", 10", 12", 14", 16", 18", 20", 24", 30", 36", 42", 48" |
Custom lengths and project-specific sizes are available on request.
Third Party Inspection Available
All specifications are in accordance of API Specification 5L. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition –API 5L X42 PSL 2 Line Welded Pipes
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C) | 0.22% |
| Manganese (Mn) | 1.30% |
| Phosphorus (P) | 0.025 |
| Sulphur (S) | 0.025 |
Note: The controlled chemistry of API 5L X42 PSL 2 Line Welded Pipes enhances weldability, fracture toughness, low-temperature performance, and long-term structural reliability while satisfying the stricter PSL 2 quality requirements.
Mechanical Properties of API 5L X42 PSL 2 Line Welded Pipes
| Property | Value (Min) |
|---|---|
| Yield Strength | 290 MPa (42 ksi) |
| Tensile Strength | 415 MPa (60 ksi) |
| Elongation | As per API 5L Formula |
| Density | 7.85 g/cm³ |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 50 W/m·K |
| Melting Range | 1425–1540°C |
| Electrical Resistivity | 0.16 µΩ·m |
| Hydrostatic Test | Required |
Note :API 5L X42 PSL 2 Line Welded Pipes combine high mechanical strength with enhanced inspection procedures, mandatory impact testing, and full traceability, making them suitable for critical oil, gas, LNG, and industrial pipeline systems.
Why Choose API 5L X42 PSL 2 Line Welded Pipes?
Applications of API 5L X42 PSL 2 Line Welded Pipes
Where API 5L X42 PSL 2 Line Welded Pipes are used:
- 🔸Oil Gathering Pipelines
- 🔸Natural Gas Distribution Lines
- 🔸Water Transmission Pipelines
- 🔸Industrial Utility Pipelines
- 🔸Industrial Utility Piping
- 🔸Petroleum Product Transfer Lines
- 🔸Petrochemical Process Piping
- 🔸Refinery Utility Systems
- 🔸Fire Water Distribution Networks
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Key Advantages of API 5L X42 PSL 2 Line Welded Pipes
Best Alternatives to API 5L X42 PSL 2 Line Welded Pipes
1.API 5L X42 PSL 2 Line Seamless Pipes
- This process provides:
- 🔸 Seamless construction without a longitudinal weld
- 🔸 Superior pressure resistance
- 🔸 Uniform mechanical properties
Best for:High-pressure process piping, refinery systems, power plants, hydraulic services, and critical industrial fluid transportation.
2. API 5L X46 PSL 1 Line Welded Pipes
- 🔸 Higher minimum yield strength of 317 MPa (46 ksi)
- 🔸 Improved pressure capability
- 🔸 Excellent mechanical performance
Best for: Long-distance transmission pipelines, refinery infrastructure, power plants, petrochemical complexes, and energy projects.
3. API 5L X46 PSL 2 Line Welded Pipes
- 🔸 Higher minimum yield strength of 317 MPa (46 ksi)
- 🔸 Better pressure-handling capability
- 🔸 Enhanced structural performance
Best for: High-pressure transmission pipelines, offshore developments, LNG infrastructure, and major energy projects.