Product Overview –API 5L X70 PSL 2 Line Welded Pipes
API 5L X70 PSL 2 Line Welded Pipes are high-strength carbon steel welded line pipes developed for demanding transmission systems where increased mechanical strength, controlled chemistry, reliable weld performance, and enhanced inspection requirements are essential. Manufactured in accordance with API Specification 5L Product Specification Level 2 (PSL 2) these pipes are suitable for transporting crude oil, natural gas, petroleum products, water, and other industrial fluids.
The X60 grade provides a minimum yield strength of 483 MPa (70 ksi) and a minimum tensile strength of 565 MPa (82 ksi). This higher strength level allows X70 to provide greater load-bearing capability than X52 and X56, making it suitable for appropriately engineered transmission systems where strength and material efficiency are important considerations.
API 5L X70 PSL 2 Line Welded Pipes can be manufactured using Electric Resistance Welding (ERW) or Longitudinal Submerged Arc Welding (LSAW) techniques depending on the pipe diameter, wall thickness, manufacturing route, and project requirements. LSAW construction is particularly suitable for large-diameter pipeline sections, while ERW provides an efficient manufacturing solution for applicable smaller and medium pipe dimensions.
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Material Specification -API 5L X70 PSL 2 Line Welded Pipes
Technical Specifications –API 5L X70 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 X70 PSL 2 Line Welded Pipes
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C) | 0.24% |
| Manganese (Mn) | 1.65% |
| Phosphorus (P) | 0.025 |
| Sulphur (S) | 0.015 |
Note: Actual chemical limits are subject to the applicable API 5L edition, manufacturing process, product type, dimensions, and delivery condition. Final heat chemistry should be verified from the Mill Test Certificate and against the purchaser's approved specification.
Mechanical Properties of API 5L X70 PSL 2 Line Welded Pipes
| Property | Value (Min) |
|---|---|
| Yield Strength | 483 MPa (70 ksi) |
| Tensile Strength | 565 MPa (82 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 :The 483 MPa minimum yield strength gives X70 greater mechanical capacity than X60 and X65. The PSL 2 classification adds enhanced testing and quality controls, making the grade suitable for demanding transmission systems where strength, toughness, inspection, and material traceability are important.
Why Choose API 5L X70 PSL 2 Line Welded Pipes?
Applications of API 5L X70 PSL 2 Line Welded Pipes
Where API 5L X70 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 X70 PSL 2 Line Welded Pipes
Best Alternatives to API 5L X70 PSL 2 Line Welded Pipes
1.API 5L X65 PSL 2 Line Welded Pipes
- This process provides:
- 🔸 Strength: 448 MPa (65 ksi) minimum yield strength
- 🔸 Suitable for: Standard transmission and industrial pipeline projects where PSL 2 is specifically permitted
- 🔸 Why consider it: Provides a lower-strength option when X70's additional yield strength is not required by the pipeline design
Best for:High-pressure process piping, refinery systems, power plants, hydraulic services, and critical industrial fluid transportation.
2. API 5L X70 PSL 1 Line Welded Pipes
- 🔸 Higher minimum yield strength of 483 MPa (70 ksi)
- 🔸 Suitable for: Transmission and industrial pipeline projects where PSL 1 is specifically permitted
- 🔸 Why consider it: Retains the X70 strength class while offering a PSL 1 specification route
Best for: Long-distance transmission pipelines, high-pressure process systems, refinery projects, and demanding industrial applications.
3.API 5L X80 PSL 2 Line Welded Pipes
- 🔸 Strength: 552 MPa (80 ksi) minimum yield strength
- 🔸 Why consider it: Provides an increased strength level for pipeline designs requiring performance beyond X70
- 🔸 Key consideration: Higher-strength grades require careful evaluation of welding, toughness, fabrication, construction, and applicable design requirements
Best for: High-pressure transmission pipelines, offshore developments, LNG infrastructure, and major energy projects.