Standard: API 5L / ISO 3183
Grade: X70 / L485 (also available: GR B, X42, X52, X60, X65 )
Specification Level: PSL2 (with mandatory impact testing)
As a leading api 5l psl2 pipe supplier in China, Yuan Steel offers high-quality api 5l x70 psl2 steel line pipe for critical oil, gas, and offshore pipeline projects worldwide. Our x70 line pipe delivers exceptional strength and toughness, meeting the most demanding requirements of modern energy infrastructure.
The api 5l x70 steel pipe (also known as L485 or api 5l grade x70) is manufactured to the stringent api 5l x70 psl2 specification, ensuring consistent performance in high-pressure environments. With a minimum yield strength of 70,300 psi (485 MPa), our api 5l x70 pipe represents the ideal balance of strength, weldability, and cost-efficiency.
Api 5l x70 psl2 refers to high-strength line pipe manufactured to the api 5l psl 2 specification level. Unlike PSL1, api 5l psl2 pipe requires:
Mandatory Charpy V-Notch (CVN) impact testing at 0°C or lower
Stricter chemical composition limits
Enhanced tensile strength requirements
Improved fracture toughness for sour service applications
Our api 5l x70 psl2 seamless pipe and welded options are ideal for arctic pipelines, offshore installations, and high-pressure gas transmission systems where reliability is critical.
API 5L X70 PSL2 Pipe Specifications
API 5L X70 PSL2 line pipe Chemical and Mechanical Properties
We supply api 5l x70 seamless pipes and welded pipes in the following dimensions:
| Steel Grade (Steel Name) | Mass Fraction, Based on Heat and Product Analyses | ||||
| % max | |||||
| C | Si | Mn | P | S | |
| API 5L X70 PSL2 Seamless Pipe | |||||
| L290Q or X42Q | 0.18 | 0.45 | 1.4 | 0.025 | 0.015 |
| L320Q or X46Q | 0.18 | 0.45 | 1.4 | 0.025 | 0.015 |
| L360Q or X52Q | 0.18 | 0.45 | 1.5 | 0.025 | 0.015 |
| L390Q or X56Q | 0.18 | 0.45 | 1.5 | 0.025 | 0.015 |
| L415Q or X60Q | 0.18 | 0.45 | 1.70 | 0.025 | 0.015 |
| L450Q or X65Q | 0.18 | 0.45 | 1.70 | 0.025 | 0.015 |
| L485Q or X70Q | 0.18 | 0.45 | 1.80 | 0.025 | 0.015 |
| L555Q or X80Q | 0.18 | 0.45 | 1.90 | 0.025 | 0.015 |
| L625Q or X90Q | 0.16 | 0.45 | 1.9 | 0.02 | 0.01 |
| L690Q or X100Q | 0.16 | 0.45 | 1.9 | 0.02 | 0.01 |
| API 5L X70 PSL2 Welded Pipe | |||||
| L290M or X42M | 0.22 | 0.45 | 1.3 | 0.025 | 0.015 |
| L320M or X46M | 0.22 | 0.45 | 1.3 | 0.025 | 0.015 |
| L360M or X52M | 0.22 | 0.45 | 1.4 | 0.025 | 0.015 |
| L390M or X56M | 0.22 | 0.45 | 1.4 | 0.025 | 0.015 |
| L415M or X60M | 0.12 | 0.45 | 1.6 | 0.025 | 0.015 |
| L450M or X65M | 0.12 | 0.45 | 1.6 | 0.025 | 0.015 |
| L485M or X70M | 0.12 | 0.45 | 1.7 | 0.025 | 0.015 |
| L555M or X80M | 0.12 | 0.45 | 1.85 | 0.025 | 0.015 |
| L625M or X90M | 0.1 | 0.55 | 2.1 | 0.02 | 0.01 |
| L690M or X100M | 0.1 | 0.55 | 2.1 | 0.02 | 0.01 |
| L830M or X120M | 0.1 | 0.55 | 2.1 | 0.02 | 0.01 |
Mechanical Properties OF API 5L X70 PSL2 Steel Line Pipe
| Pipe Body of Seamless and Welded Pipe | ||||
| Pipe Grade | Yield Strength | Tensile Strength | ||
| Rt0.5 | Rm | |||
| MPa (psi) | MPa (psi) | |||
| min | max | min | max | |
| L485Q or X70Q L485M or X70M | 485 | 635 | 570 | 760 |
| (70300) | (92100) | (82700) | (110200) | |
API 5L X70 PSL2 Pipe Types & Availability
1. By Manufacturing Process:
API 5L X70 PSL2 Seamless Pipe – Hot rolled seamless, ideal for high-pressure applications
API 5L X70 Seamless Pipes – Available in various schedules (SCH 40, SCH 80, SCH 160)
API 5L X70 PSL2 Welded Pipe – LSAW (JCOE) for large diameters, SSAW for cost-effective solutions
2. Related Grades We Supply:
API 5L Gr B PSL2 Pipe – For standard applications requiring impact testing
API 5L X65 PSL2 – Medium-high strength alternative
API 5L PSL2 X70 – Available in seamless and welded forms
API 5L X70 PSL2 Line Pipe Advantages:
a. High strength
b. High resistance to dynamic tearing
c. High low temperature impact toughness
d. Low ductile-brittle transition temperature
e. Acid service suitability
f. Economy and long lasting
High-Strength Performance
With 70,300 psi minimum yield strength, api 5l x70 pipe allows for thinner wall thicknesses, reducing material costs and transportation weight while maintaining safety margins.
Superior Low-Temperature Toughness
Our x70 line pipe undergoes rigorous CVN impact testing, making it suitable for api5l x70 applications in arctic and subsea environments where brittle fracture must be avoided.
Excellent Weldability
The controlled chemistry of api 5l x70 psl2 steel line pipe ensures excellent field weldability without preheating in most conditions, accelerating pipeline construction.
Sour Service Options
For environments with H₂S, our api 5l psl2 x70 can be supplied with additional SSC (Sulfide Stress Cracking) testing per NACE MR0175/ISO 15156.
Full Traceability
Each api 5l grade x70 pipe comes with complete mill test reports (MTRs) and material certification.
1. Customized Technical Solutions
We offer comprehensive customization including OD, WT, and length adjustments, supplemented with specialized end finishing and anti-corrosion coatings. This technical flexibility makes our line pipe ideal for various project specifications.
2. Rigorous Quality Assurance
Implementing strict quality control from material selection to final inspection, each API 5L X70 pipe undergoes multiple NDT tests and hydrostatic testing, guaranteeing consistent compliance with industry standards and project requirements.
3. Professional Technical Support
Our engineering team provides end-to-end technical services, from product selection to installation guidance, ensuring optimal performance of every API 5L pipe in your operations.
4. Proven Product Excellence
Our X70 line pipe strictly complies with API 5L pipe standards, delivering superior strength and pressure capacity while maintaining excellent toughness in low-temperature environments. The enhanced corrosion resistance ensures reliable performance even in demanding service conditions.
5. Optimized Cost Efficiency
Through vertical integration and streamlined supply chain management, we maintain competitive pricing while ensuring product quality, providing clients with superior value line pipe solutions.
Applications of API 5L X70 PSL2 Line Pipe
Our api 5l x70 psl2 seamless pipe and welded products serve critical infrastructure worldwide. As a trusted China api 5l x70 psl2 pipe supplier, we deliver high-performance solutions across diverse industries where api 5l grade x70 reliability is essential.
Oil & Gas Industry
Api 5l x70 pipe is the preferred choice for high-pressure natural gas transmission pipelines, where its 70,300 psi yield strength enables efficient long-distance transport. Our api 5l x70 psl2 steel line pipe is extensively used in long-distance crude oil trunk lines, providing the durability needed for decades of service. For offshore applications, api 5l x70 seamless pipes serve as offshore platform risers and flowlines, where the combination of strength and corrosion resistance is critical.
Marine & Offshore
Api 5l x70 psl2 seamless pipe excels in challenging marine environments. Subsea pipeline installations rely on our api 5l x70 steel pipe for its excellent weldability and resistance to hydrostatic pressure. Deep-water export pipelines demand the enhanced toughness of api 5l psl2 x70, particularly in Arctic and cold-region developments where low-temperature impact performance (CVN testing) is mandatory. For these extreme conditions, api 5l x70 psl2 delivered as api 5l x70 seamless pipes ensures operational safety.
Industrial Infrastructure
In high-pressure water injection systems, api 5l x70 pipe handles elevated pressures with reduced wall thickness, lowering material costs. Power plant steam lines benefit from the creep resistance of api 5l gr x70 psl 2, while mining slurry transport applications utilize the abrasion resistance of our api 5l x70 psl2 steel line pipe. For general industrial use, api 5l grade x70 offers an excellent strength-to-weight ratio compared to lower grades.
Please share information as below if you request for quote:
Contact us today for competitive pricing on api 5l x70 steel pipe and related grades. Please provide the following information for a customized quotation:
| Title | API 5L X70 Line Pipe |
| Qty | Pcs/Mtrs/Tons |
| Size | NPS (Outside Diameter) and Schedule No. (Wall Thickness) and Length |
| PSL Level | PSL 1 or PSL 2 |
| Grade | Grade A, Grade B, X42, X46, X52, X60, X70, X80, etc |
| Manufacturing process | Seamless or Welded |
| Surface finish | Bare, Black |
| Ends finish | Plain Ends, Beveled Ends, Threaded Ends |
| Marking | If different from the API 5L Specification |
| Protective Coatings & Linings | 3LPE, 3LPP, FBE, Akzo Nobel, Epoxy Zinc-rich Primer, Liquid Epoxy Resin, etc |
| Manufacturer | Approved Manufacturer List (AML), or Country of Origin restrictions |
| Sour service | Yes / No |
Hainan Yuan Steel Pipe Supply Chain Co.,Ltd is one of the leading API 5L X70 PSL2 Line Pipe distributors.
If you want to buy or import best high-quality API 5L X70 PSL2 Line Pipe, please kindly feel free to contact us.
