API 5L X52 Steel Pipe
API 5L X52 is a high-strength carbon steel line pipe standard (L360) for oil, gas, and water transmission. Offering a minimum yield strength of 360 MPa, it is available in PSL1 and PSL2 specifications with excellent weldability and high-pressure containment.
| Material | Carbon Steel Line Pipe (Mid-to-High Pressure) |
|---|---|
| Grade / Standard | API 5L X52 / L360 |
| Outer Diameter (OD) | NPS 1/2" - 56" (21.3mm - 1422mm) |
| Wall Thickness (WT) | Sch 10 - Sch 160 / XXS (2mm - 60mm) |
| Length | SRL (5-7m) / DRL (10-12m) / Fixed up to 18m |
| Delivery Condition | normalized / quenched_tempered / tmcp |
| Surface Treatment | galvanized |
| MOQ | 5 Tons |
| Delivery Time | 15-30 Days / In Stock |
| Loading Port | Tianjin / Shanghai / Qingdao |
Overview of API 5L X52 Steel Pipe
API 5L X52 (also designated as L360) is a high-strength carbon steel line pipe grade engineered for the efficient transportation of oil, natural gas, and water under elevated pressures. As a prominent high-yield grade within the API 5L specification, X52 provides a minimum yield strength of 360 MPa (52,200 psi), offering superior structural efficiency and pressure containment compared to standard Grade B or X42 pipes. Available in PSL1 (Standard) and PSL2 (Stringent) Product Specification Levels, API 5L X52 is the definitive choice for long-distance transmission pipelines and complex gathering systems where material toughness and reliability are paramount.
Shandong Tanglu Metal Material Co., Ltd. supplies premium API 5L X52 line pipes manufactured using advanced seamless or welded (ERW, LSAW, SSAW) processes. This grade is specifically designed to provide an optimal balance of high tensile strength, exceptional fracture toughness, and superior field weldability. For B2B energy infrastructure projects, API 5L X52 represents a globally compliant, high-performance solution that optimizes pipeline safety and reduces overall project costs through improved material performance.
Key Features and Technical Advantages
The primary advantage of API 5L X52 steel pipe is its high yield-to-tensile ratio, which allows for the design of thinner-walled pipelines without compromising safety factors, significantly reducing transport and installation costs. The material is enhanced with micro-alloying elements (such as Niobium or Vanadium) to refine the grain structure, resulting in excellent low-temperature impact toughness and resistance to brittle fracture. It is engineered to perform reliably under the rigorous demands of hydrostatic testing and field bending required for cross-country installations.
Our API 5L X52 pipes are supplied in a vast range of specifications, from NPS 1/2″ up to NPS 56″, covering all standard schedules and heavy-wall requirements. For high-stakes or corrosive environments, we supply PSL2 X52 pipes featuring mandatory Charpy V-Notch (CVN) testing, tighter chemical controls, and higher non-destructive examination (NDE) protocols. To ensure maximum environmental durability, we offer specialized protective coatings including 3PE, FBE, and liquid epoxy linings, tailored to withstand extreme soil chemistry or maritime conditions.
Main Applications of API 5L X52 Line Pipe
API 5L X52 steel pipe is the foundational material for mid-to-high pressure midstream infrastructure. It is extensively utilized in the construction of large-scale cross-country oil and natural gas transmission pipelines, where its high strength ensures efficient flow over vast distances. In the upstream sector, it serves as the essential conduit for gathering lines and high-pressure flowlines connecting wellheads to central processing facilities and storage terminals.
Beyond hydrocarbons, X52 is widely utilized for major municipal water transmission projects and high-pressure slurry pipelines in the mining and industrial sectors. It is also an indispensable component in offshore platform piping, subsea transmission lines, and refinery process systems. Its versatility and reliable mechanical profile make it a staple for EPC contractors and pipeline operators involved in the world’s most critical energy and industrial fluid transport deployments.
Why Choose Us for API 5L X52 Steel Pipe
Shandong Tanglu Metal Material Co., Ltd. supplies high-grade API 5L X52 steel pipe sourced from Tier-1 API-certified mills with integrated continuous casting and high-precision rolling technology. We provide comprehensive Mill Test Certificates (MTC) for every order, documenting full compliance with the 46th edition of API 5L, including precise chemical analysis, mechanical property verification, and mandatory hydrostatic pressure test results.
Our logistical expertise ensures flexible pipe lengths (SRL, DRL, or Fixed) and specialized seaworthy packaging designed to protect beveled ends and anti-corrosion coatings during international transit. With a stable monthly supply capacity of 15,000 tons and dedicated technical support for both PSL1 and PSL2 specifications, we provide B2B clients with the material consistency, technical transparency, and logistical reliability required for high-stakes energy infrastructure.
📐 Dimension & Size Table
| NPS (Inch) | OD (mm) | Schedule | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|
| 4" | 114.3 | Sch 40 (STD) | 16.07 | |
| 6" | 168.3 | Sch 40 (STD) | 28.26 | |
| 8" | 219.1 | Sch 40 (STD) | 42.55 | |
| 10" | 273.1 | Sch 40 (STD) | 60.31 | |
| 12" | 323.8 | Sch 40 (STD) | 79.73 | |
| 16" | 406.4 | Sch 40 (STD) | 125.17 | |
| 24" | 610.0 | Sch 40 (STD) | 257.06 | |
| 42" | 1067.0 | Sch 40 (STD) | 517.22 |
* Custom sizes available upon request. Tolerances per relevant international standards.
🔬 Chemical Composition
| Element | Min | Max | Display Value | Note |
|---|---|---|---|---|
| C | - | 0.26 | ≤0.26 | For PSL1 (L360) |
| Mn | - | 1.40 | ≤1.40 | |
| P | - | 0.030 | ≤0.030 | |
| S | - | 0.030 | ≤0.030 | |
| Nb+V+Ti | - | 0.15 | Ref ≤0.15 | Micro-alloyed for strength |
* Chemical composition may vary by heat, thickness and specification. Please refer to the actual mill test certificate.
⚙️ Mechanical Properties
| Property | Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength | ≥360 | MPa | 52,200 psi (L360) |
| Tensile Strength | ≥460 | MPa | 66,700 psi |
| Elongation (A50mm) | ≥21 | % | Calculated base |
| Hydrostatic Test | Passed | - | Mandatory testing |
| Impact Toughness (CVN) | Required | J | For PSL2 orders |
* Values shown are minimum requirements unless otherwise stated.
📦 Commercial Information
| Packaging | Seaworthy export standard packaging. Pipes are tightly bundled with high-strength steel straps for smaller diameters, while large diameters are shipped loose with protective end caps to prevent internal contamination. For anti-corrosion coated pipes (3PE/FBE), bundles are protected with waterproof woven bags or plastic wrapping, and handled with specialized non-metallic slings to ensure zero damage to the coating surface during international transit. |
|---|---|
| Payment Terms | T/T (Telegraphic Transfer),L/C (Letter of Credit),D/P (Documents against Payment),Western Union |
| Price Term | FOB,CFR,CIF,DDP |
| Supply Capacity | 15,000 Tons/Month |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our API 5L X52 Steel Pipe?
High-Pressure Performance
360 MPa minimum yield strength (L360) allows for elevated operating pressures and optimized pipeline efficiency over long-distance networks.
Enhanced PSL2 Structural Safety
PSL2 specification level provides mandatory impact testing and tighter chemical control, essential for high-risk offshore and subsea applications.
Superior Field Weldability
Micro-alloyed chemistry ensures consistent, high-integrity welding performance and reliable structural joints during cross-country assembly.
100% Hydrostatic Assurance
Every length of pipe is subjected to mandatory mill pressure testing to guarantee leak-free performance and structural stability under extreme service.
Excellent Anti-Corrosion Substrate
Provides the ideal clean surface for 3PE, FBE, and liquid epoxy coatings, ensuring maximum durability in corrosive soil and maritime environments.
🏭 Applications of API 5L X52 Steel Pipe
API 5L X52 steel pipe is the definitive choice for mid-to-high pressure energy infrastructure, essential for high-volume oil and gas transmission pipelines and oilfield gathering flowlines. It is the primary material for large-scale municipal water transmission projects and high-pressure slurry pipelines in the mining sector. In the offshore industry, it is widely utilized for platform piping and subsea transmission lines. API 5L X52 also serves as the trusted standard for refinery process piping, airport fuel distribution, and high-integrity industrial fluid engineering projects.
📋 Quality & Certification
Our Certifications
- ✅ ISO 9001:2015
- ✅ CE Marking
- ✅ ABS
- ✅ DNV GL
- ✅ Lloyd's Register (LR)
- ✅ Bureau Veritas (BV)
- ✅ SGS Certified
- ✅ NK
- ✅ RINA
Mill Certificate Type
- 📋 EN 10204 3.1
- 📋 EN 10204 3.2
- 📋 Original Mill Certificate
- 📋 Third Party Inspection Available
- 📋 Certificate of Origin
❓ Frequently Asked Questions
What is the yield strength of API 5L X52 pipe?
The minimum yield strength is 360 MPa (52,200 psi). The 'X' in X52 represents high-strength line pipe, and '52' represents the minimum yield strength in kilopounds per square inch (ksi).
What is the difference between X52 and Grade B?
X52 has a much higher yield strength (360 MPa) compared to Grade B (245 MPa). This allows for higher pressure ratings or reduced wall thicknesses in pipeline construction while maintaining safety factors.
Can X52 pipe be used for sour service (H2S)?
Yes, but it must be specifically ordered to comply with Annex H of API 5L, which includes HIC and SSC testing. Standard X52 is not inherently rated for sour service without these additional certifications.
What are the common welding methods for X52 pipe?
API 5L X52 is highly weldable and is typically joined using Shielded Metal Arc Welding (SMAW), Gas Metal Arc Welding (GMAW), or Submerged Arc Welding (SAW) depending on the project requirements.
What is the lead time for 3PE coated X52 pipe?
For standard sizes in stock, the coating and preparation process typically adds 7-10 days, with a total delivery time of 15-30 days from major ports like Tianjin or Qingdao.
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API 5L X52 Steel Pipe
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