L360 steel pipe belongs to the pipeline steel grade in the API 5L standard, where "L" stands for line pipe and "360" indicates a minimum yield strength of 360 MPa (52,200 psi). This material achieves a balance between high strength and good toughness through microalloying design (such as the addition of elements like Nb, V, and Ti) and controlled rolling and cooling processes. It also possesses excellent weldability and corrosion resistance, making it suitable for acidic environments containing hydrogen sulfide.
Looking for the Perfect Balance of Strength and Budget? API 5L L360 offers superior pressure containment compared to L245/L290, allowing for optimized wall thickness that reduces total steel weight and shipping costs to South American ports. Request a Comparative Quote Today
Product Dimensions & Size Specifications of API L360 pipelines for combustible fluids
| Outside Diameter (OD) | Wall Thickness (WT) | Standard Length | Production Type |
| 2" – 24" | SCH 10 – SCH XXS | 6m, 12m, DRL | Seamless (SMLS) |
| 8" – 24" | 4.0mm – 15.0mm | Up to 12.5m | ERW (Resistance Welded) |
| 18" – 56" | 6.4mm – 60.0mm | 11.8m – 12m | LSAW (Longitudinal Welded) |
| Common S.A. Specs | STD, XS, XXS | Custom Lengths | Beveled/Plain Ends |
Technical Parameters: L360 (X52) PSL1 vs. PSL2
| Property | L360 PSL1 | L360 PSL2 (Recommended) |
| Yield Strength (min) | 360 MPa (52,200 psi) | 360 - 510 MPa |
| Tensile Strength (min) | 460 MPa (66,700 psi) | 460 - 760 MPa |
| Impact Test (CVN) | Not Required | Mandatory (Ensures crack resistance) |
| Weldability (CEq) | Not Required | Strictly Controlled (≤ 0.43) |
| Full Traceability | Limited | Full Heat-to-Pipe Traceability |
Production Processes of L360 pipeline for oil and gas
Seamless Process: Continuous mandrel rolling and heat treatment to achieve a uniform grain structure, ideal for high-pressure gas injection.
ERW/HFW Process: Utilizing high-frequency induction welding with Post-Weld Heat Treatment (PWHT) of the seam, ensuring the weld zone is as ductile as the parent metal.
LSAW Process: Each pipe is formed via JCOE technology and undergoes double-sided submerged arc welding for maximum wall thickness reliability.
Inspection & Testing Items of API L360 Carbon Steel Line Pipe
Chemical & Mechanical Analysis: Verifying Yield, Tensile, and Elongation.
Hydrostatic Test: Every pipe is tested to verify pressure containment.
NDT (Non-Destructive Testing): 100% UT/RT testing of welds and pipe body.
Charpy V-notch Impact Test: Mandatory for PSL2 to guarantee toughness in seismic or low-temp zones.
Surface Protection Of L360 oil and gas pipelines
Export-Grade Anti-Rust Varnish: Every bare L360 pipe is coated with a high-performance black varnish or transparent anti-rust oil.
3PE/FBE Integrity: For coated pipes, we ensure the 3PE layer exceeds DIN 30670 thickness standards to withstand the mechanical stress of long-haul transit.
Internal Protection: Upon request, we apply internal rust inhibitors or liquid epoxy linings to prevent internal oxidation during storage at South American port facilities like Santos (Brazil) or San Antonio (Chile).
End Protection of L360 High Yield Line Pipes
Heavy-Duty Plastic Caps: For pipes under 24", we use high-impact recessed plastic caps to seal out moisture and debris.
Metallic Bevel Protectors: For large-diameter or heavy-wall L360 pipes, we install steel ring protectors to prevent "out-of-roundness" and edge damage during crane handling.
Secure Bundling & Handling (3PE Safety) of L360 Oil and gas pipe lines
Hexagonal Bundling: Pipes under 8" are tightly secured in hexagonal bundles with high-tensile steel strips for easy unloading.
No-Scratch Loading: We use wide nylon slings and rubber-padded dunnage during the loading process. We strictly forbid the use of steel wire ropes directly on 3PE/FBE surfaces to prevent coating scratches.
Internal Bracing: For large-diameter thin-wall pipes (SSAW/LSAW), we install wooden or steel "X-braces" inside the pipe ends to maintain perfect circularity during stacking.
Shipping Modes of L360 pipeline
Containerized Shipping (20ft/40ft): Ideal for standard 6m or 12m lengths. We utilize specialized "racks" to maximize space and ensure stability in heavy seas.
Breakbulk Cargo: The most cost-effective solution for large-scale infrastructure projects in Colombia (Cartagena) or Peru (Callao). We secure below-deck storage to minimize exposure to sea spray.
FCL & LCL Services: Whether you need 20 tons or 5,000 tons, we optimize the loading plan to reduce your "Freight-per-Ton" cost.
FAQ
What is L360 material equivalent to?
EN L360 is a high-strength, low-alloy pipeline steel grade designed for demanding oil and gas transmission applications. Equivalent to API 5L X52, this steel offers exceptional weldability, toughness, and corrosion resistance for long-distance pipeline systems operating under high pressure conditions.
What grade is L360 pipe?
API 5L Grade L360 is standard specification for dimensions, material and technical delivery conditions of seamless and welded steel pipe, mainly used for pipelines. This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries. API 5L is suitable for conveying gas, water, and oil.
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