API 5L X52 Seamless Steel Pipe is a high-performance carbon steel pipeline product manufactured in strict accordance with the American Petroleum Institute (API) Specification 5L. Designed for the efficient and safe transportation of oil, natural gas, water, and other fluids, this pipe grade offers an optimal balance of strength, weldability, and cost-effectiveness. The "X52" designation indicates a minimum yield strength of 52,000 psi (360 MPa), making it a preferred choice for mid-pressure transmission lines in the energy and infrastructure sectors.
Products Description
| Product | API 5L X52 Seamless Steel Pipe |
| Standard | API 5L PSL1, PSL2 |
| Grade | B, X42, X46, X52, X56, X60, X65, X70 |
| Manufacturing | Hot rolling, Cold drawing, Expanding |
| Range | OD 1/2"~36"(21.3~914mm), Thickness 0.055"~2"(1.65~50mm) |
| Coating | Bare, black painting, FBE, Epoxy , 3LPE,3LPP... |
| Ends | bevel, plain, groove, threading and coupling |
| Applications | boiler, oil/gas/water piping line |
Material & Grade
1. Material Grade & Standards
Standard: API 5L (Latest Edition)
Grade: X52 (Equivalent to L360 in ISO 3183)
Product Specification Levels (PSL): Available in both PSL1 and PSL2.
PSL1: Standard quality requirements for general applications.
PSL2: Enhanced requirements including stricter chemical composition controls, higher toughness testing (Charpy V-Notch), and non-destructive testing, suitable for critical environments.
Manufacturing Process: Seamless (Hot Rolled or Cold Drawn), ensuring uniform wall thickness and superior pressure resistance compared to welded alternatives.
2. Mechanical Properties
Minimum Yield Strength: 360 MPa (52,000 psi)
Tensile Strength: 460–760 MPa (66,700–110,000 psi)
Elongation: High ductility ensures excellent formability and bending performance during installation.
3. Chemical Composition
The steel is produced using controlled carbon-manganese chemistry, often with micro-alloying elements (such as Nb, V, Ti) to enhance grain refinement and strength without compromising weldability. Strict limits on Sulfur (S) and Phosphorus (P) ensure high purity and resistance to cracking.
Hot rolled manufacturing
Raw Material Selection: High-quality steel billets are selected based on strict chemical composition standards.
Heating & Piercing: Billets are heated to a plastic state and pierced to form a hollow shell.
Rolling & Elongation: The shell is elongated and rolled over a mandrel to achieve the desired diameter and wall thickness.
Sizing & Straightening: Precision sizing ensures dimensional accuracy, followed by straightening to meet tolerance standards.
Heat Treatment: Optional normalizing or quenching and tempering may be applied to enhance mechanical properties, especially for PSL 2 grades.
Inspection & Testing: Each pipe undergoes rigorous testing, including hydrostatic testing, non-destructive testing (NDT), dimensional checks, and mechanical property verification.
Surface Treatment & End Finishes
Surface Finish: Black varnish, anti-rust oil, epoxy coating, 3LPE/3LPP coating, or hot-dip galvanized as per customer requirement.
End Types: Plain ends (PE), Beveled ends (BE) with PVC caps, or threaded ends with couplings.
quality control
* Hydrostatic Pressure Testing
* Non-Destructive Testing (Eddy Current, Ultrasonic)
* Mechanical Property Testing
* Chemical composition test
* Dimension & Visual Inspection
* Full Traceability (Mill Test Certificates 3.1 provided)
Features & Advantages
Superior Integrity: The seamless manufacturing process eliminates weld seams, reducing the risk of leakage under high pressure.
Cost-Efficient: X52 grade provides a significant strength upgrade over standard Grade B pipes at a marginal cost increase, offering better value for medium-pressure applications.
Global Compliance: Fully compliant with international standards, facilitating easy integration into global EPC projects.
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Application
Oil & Gas Transmission: Mainline pipelines for transporting crude oil and natural gas.
Water Distribution: High-pressure water supply systems.
Industrial Processing: Fluid transport in chemical and petrochemical plants.
Structural Applications: Occasionally used in structural supports where high strength-to-weight ratio is required.
Packaging & Delivery
Packaging: Pipes are bundled with steel strips, with plastic caps on both ends to prevent damage during transit.
Marking: Each pipe is clearly marked with API 5L specification, grade, size, heat number, and PSL level for full traceability.
Delivery: Standard export packaging suitable for sea freight, container loading, or bulk shipment.
Contact
Kevin
Tianjin shenzhoutong steel pipe co.,ltd
kevin@tjshenzhoutong.com
Mob/whatsapp/wechat +86 15267768016
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