API 5L X65 High-Strength Pipes
Premium quality API 5L X65 high-strength line pipes for high-pressure oil and gas transmission systems
Premium API 5L X65 High-Strength Line Pipes
Starlight Tubes supplies premium API 5L X65 high-strength line pipes engineered for demanding oil and gas transmission applications. API 5L X65 pipes offer minimum yield strength of 65,300 psi (450 MPa) with excellent toughness and weldability, making them ideal for high-pressure natural gas pipelines, offshore deepwater installations, and long-distance transmission systems requiring superior mechanical properties.
Our API 5L X65 pipes are produced through controlled thermomechanical rolling (TMCP) or quench and temper processes to achieve optimal microstructure and mechanical properties. Each pipe undergoes comprehensive testing including tensile testing, CVN impact testing at low temperatures, DWTT, HIC/SSC testing for sour service, and full-body ultrasonic inspection to ensure PSL2 compliance for critical pipeline projects.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — API 5L Grade X65 (L450)
Chemical composition, tensile properties, and sour service HIC resistance for API 5L X65 line pipe
| Grade / Delivery | C (max) | Mn (max) | P (max) | S (max) | V+Nb+Ti (max) | CEpcm (max) |
|---|---|---|---|---|---|---|
| X65 (Seamless) | 0.18 | 1.60 | 0.020 | 0.010 | 0.15 | 0.22 |
| X65 (Welded) | 0.16 | 1.65 | 0.020 | 0.010 | 0.15 | 0.22 |
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Your Trusted API 5L X65 Pipe Supplier
Starlight Tubes specializes in high-strength API 5L X65 line pipes for demanding pipeline applications. We provide PSL2 certified products with HIC/SSC testing for sour service.
Frequently Asked Questions on API 5L X65 Pipes
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
API 5L X65 pipes are used for high-pressure natural gas pipelines, offshore deepwater installations, and sour service applications. With 450 MPa yield strength, they are ideal for demanding long-distance transmission systems.
Request Project Quotation for API 5L X65 Pipes
Submit your required sizes, wall thicknesses, material grades, and total tonnage. Our technical sales engineers respond with complete mill pricing and lead times within 24 hours.