Yousef Steel, a prominent steel manufacturer and supplier located in Riyadh, Saudi Arabia, proudly offers top-notch **API 5L Grade L390 pipes**, also referred to as **X56 pipes**. These pipes are expertly designed for the safe and efficient transportation of oil, gas, water, and various other fluids in high-pressure transmission systems. Crafted in line with **API 5L specifications**, they find extensive use in pipeline construction, offshore platforms, refineries, and midstream applications. Yousef Steel is committed to upholding industry standards, providing both PSL1 and PSL2 variants tailored to meet specific project needs.
**API 5L L390 (X56)** pipes boast a **minimum yield strength of 390 MPa** along with impressive tensile strength, making them ideal for moderate to high-pressure settings. They come in both **seamless** and **welded (ERW, LSAW, SSAW)** forms, and can be customized with plain ends, beveled ends, or threaded ends. The PSL2 grade offers tighter tolerances, enhanced mechanical properties, and additional testing requirements, including notch toughness and non-destructive inspection.
| Specification | API 5L / ISO 3183 Hot Rolled . |
| API 5L Grade L390 Pipe Type | Seamless |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Outer Diameter Size | 3/8″ NB To 30″ NB (Nominal Bore Size) |
| Wall Thickness | Schedule 20 To Schedule XXS (Heavier On Request) Up to 250 mm Thickness |
| Length | 5 To 7 Meters, 09 To 13 Meters, Single Random Length, Double Random Length And Customize Size. |
| Pipe Ends | Plain Ends / Beveled Ends / Coupling |
| Surface Coating | Epoxy Coating / Colour Paint Coating / 3LPE Coating. |
| Carbon | Silicon | Manganese | Phosphorous | Sulphur | Molybdenum | Nickel | Chromium | Copper | Others |
|---|---|---|---|---|---|---|---|---|---|
| max 0.28 | – | max 1.40 | 0.03 | 0.03 | – | – | – | – | Nb+Ti+V max 0.15 |
| Yield Strength | Tensile Strength | Elongation A5 min | |||
|---|---|---|---|---|---|
| MPa min | ksi min | MPa min | MPa min | ksi min | Percentage |
| 490 | – | 71 | – | ||
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
These pipes are commonly utilized in **onshore and offshore pipeline systems**, facilitating fluid transmission over long distances while ensuring high strength and resistance to corrosion. Yousef Steel provides API 5L L390 pipes in a variety of diameters, wall thicknesses, and coating options (like FBE and 3LPE), along with comprehensive documentation that includes **EN 10204 3.1/3.2 certificates**, hydrostatic testing, and third-party inspection services tailored to client specifications.
API 5L Grade L390 pipes are applied mostly within the oil and gas sector for conveying refined products, crude oil, and natural gas over very long distances. Because of their high strength, they find applications in high-pressure conditions, particularly under severe environments. They are also employed in the manufacture of pipelines for transmission systems, petrochemical plants, and refineries. The composition of the alloy ensures outstanding corrosion resistance, thereby guaranteeing long-term durability regardless of weather. API 5L Grade L390 is also utilized in offshore pipelines and areas with extreme temperatures.
Yousef Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Riyadh, Saudi Arabia.
Copyright 2025 Yousef Steel. All rights reserved
