Product Overview –API 5L X46 PSL 2 Line Welded Pipes
API 5L X46 PSL 2 Line Welded Pipes are premium high-strength carbon steel welded line pipes engineered for critical pipeline systems where superior weld integrity, enhanced fracture toughness, and stringent quality assurance are mandatory. Manufactured in accordance with API Specification 5L Product Specification Level 2 (PSL 2), these pipes are widely used for transporting crude oil, natural gas, LNG, hydrogen, petroleum products, water, and industrial process fluids under demanding operating conditions.
Produced using advanced Electric Resistance Welding (ERW) and Longitudinal Submerged Arc Welding (LSAW) technologies, API 5L X46 PSL 2 Line Welded Pipes deliver exceptional dimensional accuracy, reliable mechanical performance, and consistent weld quality. Compared with PSL 1, the PSL 2 specification imposes stricter limits on chemical composition, mandatory Charpy V-Notch impact testing, comprehensive non-destructive examination, and complete material traceability, making these welded pipes ideal for safety-critical pipeline infrastructure.
The higher strength of the X46 grade provides improved pressure resistance over X42 while maintaining excellent weldability and fabrication characteristics. These pipes are extensively used in cross-country oil & gas transmission pipelines, LNG terminals, offshore production facilities, petrochemical complexes, petroleum refineries, hydrogen transportation systems, power generation plants, marine engineering, and major industrial processing projects.
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Material Specification -API 5L X46 PSL 2 Line Welded Pipes
Technical Specifications –API 5L X46 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 X46 PSL 2 Line Welded Pipes
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C) | 0.22% |
| Manganese (Mn) | 1.40% |
| Phosphorus (P) | 0.025 |
| Sulphur (S) | 0.015 |
Note: The controlled chemical composition of API 5L X46 PSL 2 Line Welded Pipes improves weldability, fracture toughness, resistance to crack propagation, and long-term reliability while complying with the stricter PSL 2 quality requirements.
Mechanical Properties of API 5L X46 PSL 2 Line Welded Pipes
| Property | Value (Min) |
|---|---|
| Yield Strength | 317 MPa (46 ksi) |
| Tensile Strength | 435 MPa (63 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 X46 PSL 2 Line Welded Pipes combine higher mechanical strength with enhanced inspection procedures, mandatory impact testing, and complete material traceability, making them ideal for demanding oil & gas and industrial transmission systems.
Why Choose API 5L X46 PSL 2 Line Welded Pipes?
Applications of API 5L X46 PSL 2 Line Welded Pipes
Where API 5L X46 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 X46 PSL 2 Line Welded Pipes
Best Alternatives to API 5L X46 PSL 2 Line Welded Pipes
1.API 5L X46 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
- 🔸 Enhanced quality assurance and traceability
- 🔸 Standard PSL 1 quality requirements
- 🔸 Improved fracture toughness
Best for: Critical oil & gas transmission, LNG terminals, offshore facilities, petrochemical plants, and high-reliability industrial pipeline projects.
3.API 5L X52 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.