Description
API 5L Gr X65 PSL1 & PSL2
API 5L Gr X65 pipes are designed for the transportation of oil, natural gas, and water under high-pressure conditions. Available in PSL1 and PSL2 specifications, these pipes offer enhanced mechanical properties, corrosion resistance, and weldability to meet the demanding requirements of modern pipeline systems.
API 5L Gr X65 Chemical Composition
| Element | PSL1 Limit | PSL2 Limit |
|---|---|---|
| Carbon (C) | ≤ 0.28 | ≤ 0.18 |
| Manganese (Mn) | ≤ 1.40 | ≤ 1.70 |
| Phosphorus (P) | ≤ 0.030 | ≤ 0.025 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.015 |
| Carbon Equivalent (Ceq) | – | ≤ 0.43 |
| Carbon Equivalent (Pcm) | – | ≤ 0.25 |
API 5L Gr X65 Mechanical Properties
| Property | PSL1 | PSL2 |
|---|---|---|
| Yield Strength (MPa) | ≥ 450 | 450 – 600 |
| Tensile Strength (MPa) | ≥ 535 | 535 – 760 |
| Elongation (%) | ≥ 20 | 20 – 25 |
| Charpy Impact Test | Optional | Required for critical applications |
Manufacturing Types:
- Seamless Pipes: Manufactured without a weld seam, providing uniform mechanical properties.
- Welded Pipes:
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ERW (Electric Resistance Welded) – economical option for medium diameter pipelines.
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LSAW/DSAW (Longitudinal Submerged Arc Welded / Double Submerged Arc Welded) – suitable for large diameter pipelines.
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SSAW (Spiral Submerged Arc Welded) – used in longer pipelines and high-pressure applications
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End Types:
- Beveled ends (for welding).
- Plain ends (for mechanical joining).
- Threaded ends (for connections without welding).
Coatings & Linings:
- External: FBE (Fusion Bonded Epoxy), 3LPE (Three-Layer Polyethylene), 3LPP (Three-Layer Polypropylene).
- Internal: Epoxy or other corrosion-resistant linings to suit specific fluid transport requirements.
Applications:
- Oil & gas pipelines (onshore/offshore).
- Water transportation systems.
- Refineries and petrochemical plants.
- Power generation and industrial projects.
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