API 5L Grade X70 (PSL1 / PSL2) Transmission Line Pipes
Micro-alloyed high-strength steel pipes with low carbon equivalent and excellent low-temperature fracture toughness.
API 5L X70 / ISO 3183 L485 Cross-Country Pipeline
Starlight Tubes manufactures API 5L Grade X70 (PSL1 and PSL2) seamless and Longitudinal Submerged Arc Welded (LSAW) line pipes for major energy infrastructure projects. Micro-alloyed with Vanadium, Niobium, and Titanium, X70 achieves high mechanical strength while maintaining superior field weldability and fracture arrest properties.
Our X70 pipes undergo rigorous testing including full-body ultrasonic inspection, 100% radiographic examination of welds, Charpy V-Notch impact testing at -40°C, and drop-weight tear testing (DWTT). Compatible with 3LPE, 3LPP, and FBE anti-corrosion external coatings.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — API 5L Grade X70 (PSL2)
Certified chemical limits and mechanical tensile properties for API 5L X70
| Grade | C (max) | Mn (max) | P (max) | S (max) | V+Nb+Ti (max) | CEpcm (max) |
|---|---|---|---|---|---|---|
| X70M (Seamless) | 0.12 | 1.60 | 0.020 | 0.010 | 0.15 | 0.20 |
| X70M (Welded) | 0.10 | 1.70 | 0.020 | 0.005 | 0.15 | 0.20 |
Explore Complementary Grades & Fittings
Discover matching tubular components, high-pressure fittings, and companion alloys for your piping project
API 5L X42 Pipes
High-strength pipeline steel
API 5L X52 Pipes
Premium pipeline pipes for oil & gas
API 5L X65 Pipes
High-grade pipeline steel for demanding applications
ASTM A335 Grade P11 Chrome-Moly Pipes
1.25Cr-0.5Mo seamless alloy steel pipes for high-temperature power plant steam piping
Direct Mill Supply for API 5L X70 Line Pipes
Starlight Tubes supplies API 5L X70 line pipes with certified Charpy impact test reports, DWTT compliance, and factory 3LPE/FBE coating.
Frequently Asked Questions on API 5L Grade X70 Line Pipes
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
API 5L X70 has a minimum yield strength of 485 MPa (70,300 psi) and tensile strength ranging between 570 MPa and 760 MPa for PSL2.
Request Project Quotation for API 5L Grade X70 Line 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.