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API 5L X60 & X65 Line Pipes

Special Products

API 5L X60 & X65 Line Pipes

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API 5L X60 and API 5L X65 are high-strength carbon steel pipe grades used for the transmission of oil, gas, and water across long distances in onshore and offshore pipeline systems. These line pipes meet the requirements of the American Petroleum Institute (API) Specification 5L and are widely used in the oil & gas, petrochemical, and infrastructure sectors. The “X” designation denotes minimum yield strength in 1000s of psi—X60 (60,000 psi) and X65 (65,000 psi).

Key Features

  • High Yield Strength: Suitable for high-pressure and critical-service environments.
  • Excellent Weldability: Seamless and welded options offer easy fabrication.
  • Corrosion Protection: Compatible with external coatings such as FBE, 3LPE, and galvanizing.
  • Dimensional Flexibility: Available in various diameters and wall thicknesses.
  • Versatility: Used in sweet and sour service conditions depending on PSL2 compliance.

Chemical Composition

Grade

Carbon (C)

Manganese (Mn)

Phosphorus (P)

Sulfur (S) 

X60

0.28

1.40

0.030

0.030

X65

0.28

1.40

0.030

0.030

 

Mechanical Properties

Property

X60

X65

Yield Strength (min)

415 MPa (60,200 psi)

450 MPa (65,300 psi)

Tensile Strength

520–760 MPa

535–760 MPa

Elongation

≥ 21%

≥ 19%

 

Applications

  • Oil & Gas Transmission Pipelines: Used for transporting crude oil and natural gas over long distances under high pressure.
  • Petrochemical and Refinery Piping: Employed in process piping and fluid transfer systems exposed to aggressive chemicals and high temperatures.
  • Offshore Risers and Subsea Pipelines: Ideal for deepwater applications requiring high strength and corrosion resistance.
  • Water and Slurry Pipelines: Used in mining and industrial sectors for transporting abrasive and high-density fluids.
  • Foundation Piling and Structural Supports: Provides strong load-bearing capacity in bridge, marine, and civil engineering projects.
Forms Available
  • Seamless Pipe: For high-pressure and critical applications.
  • ERW Pipe: Economical and suitable for moderate-pressure systems.
  • LSAW Pipe: For large-diameter pipelines in structural and fluid transport.
  • HSAW Pipe: Used in bulk transmission projects.

PSL1 vs PSL2 Comparison

Feature

PSL1

PSL2

Mechanical Testing

Optional

Mandatory

Chemical Control

Standard

Stricter Limits

NDT for Welds

Optional

Mandatory

Traceability

Not Required

Required

SSC Resistance

Not Guaranteed

Must comply with NACE (for sour service)

 

Surface Finish and Coatings

To enhance durability:
  • Pipes are available bare, black-painted, varnished, or externally coated.
  • Compatible coatings: FBE, 3LPE, 3LPP, Coal Tar Enamel, Zinc.

Quality Assurance & Packaging

  • Certifications: API 5L, ISO 3183, ISO 9001, and NACE MR0175 (for PSL2).
  • Third-Party Inspection: Optional from SGS, BV, DNV, TUV.
  • Packaging: End caps, steel bundles, plastic-wrapped or crated for exports.

Contact Riyaarth Overseas for API 5L X60 & X65 pipes manufactured to the highest global standards—engineered for durability, inspected for quality, and delivered on time.

FAQ's

What is the difference between API 5L X60 and X65?

X65 offers higher yield strength than X60, making it suitable for higher-pressure applications or thinner wall designs.

Are both grades available in PSL2?

Yes, both API 5L X60 and X65 are available in PSL1 and PSL2, with enhanced requirements in PSL2.

Can these pipes be used in sour service?

Yes, provided they meet NACE MR0175 and PSL2 conditions with additional SSC resistance.

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