Key Features
Line pipe is a high-strength steel pipe designed for the safe and efficient transportation of oil, natural gas, water, and other fluids over long distances. It is manufactured to meet stringent international standards, ensuring excellent mechanical properties, corrosion resistance, and weldability. Line pipes are widely used in onshore and offshore pipeline systems, where they provide reliable performance under high pressure and demanding environmental conditions. They are available in various grades, sizes, and wall thicknesses to suit different operating requirements and project specifications.
Certified:
Our line pipes are manufactured and inspected in strict accordance with internationally recognized standards, including API 5L, ASTM, and ISO requirements.
Application:
Line pipes are widely used for the safe and efficient transportation of oil, natural gas, water, and other fluids over long distances. Designed to withstand high pressure, harsh operating conditions, and corrosive environments, they are an essential component of modern pipeline infrastructure.
In the oil and gas industry, line pipes are extensively used for gathering, transmission, and distribution systems. They transport crude oil, refined petroleum products, and natural gas from production fields to refineries, storage facilities, and end users, ensuring reliable and continuous operation. Their high strength, excellent weldability, and corrosion resistance make them suitable for both onshore and offshore pipeline projects.
Line pipes are also widely applied in municipal water supply, irrigation networks, desalination plants, and wastewater treatment systems. With optional anti-corrosion coatings such as FBE, 3LPE, and 3LPP, they provide long-term durability and dependable performance in demanding environments.
In addition, line pipes are used in petrochemical plants, power stations, mining operations, and other industrial facilities for transporting process fluids, slurry, cooling water, and industrial gases. Available in seamless and welded types with various grades, diameters, and wall thicknesses, they can be customized to meet different project specifications and international standards.
Manufactured under strict quality control procedures and tested to ensure outstanding mechanical performance, our line pipes offer a reliable, cost-effective, and long-lasting solution for pipeline projects worldwide.
Specification:
| API 5L Line Pipe Technical Specifications | ||
| Technical Property | API Standard Specification | Engineering Significance |
| Product Specification Level | PSL 1 (Standard Quality) | PSL 2 is mandatory for high-pressure gas lines, sour services, and severe climatic environments, requiring mandatory impact toughness tests. |
| PSL 2 (Strict mechanical, chemical &NDT controls) | ||
| Steel Grades Range | • Normal:Grade B, X42, X46, X52 | The "X" followed by a number indicates the minimum yield strength in kilopounds per square inch (el) (e.g., X70 = 70, 000 psi minimum yield). |
| • High-Strength:X56, X60, X65, X70, X80 | ||
| Manufacturing Process | • Seamless (SMLS) Up to 28° OD | ERW and SMLS handle smaller endothelial distribution headers, while LSAW is the definitive choice for critical high-pressure, heavy-wall transmission lines. |
| • Electric Resistance Welded (ERW) Up to 24° OD | ||
| • Longitudinal Submerged Arc Welded (LSAW) 16° to 60° OD | ||
| • Spiral Submerged Arc Welded (SSAW) 20° to 100° OD | ||
| Delivery Condition | • As Rolled / Normalizing Rolled | TMCP is extensively used for high-grade steels (065/070/085) to achieve superior availability and high low-temperature impact toughness without adding excessive alloys. |
| • Thermomechanical Powder/Cropil Process (TMCP) | ||
| • Quenched and Tempered (OST) | ||
| Service Environments | • Standard Service (Non-conservative hydrocarbons) | Sour service pipes undergo HIC (hydrogen-induced Cracking) and SSC (Surface Stress Cracking) leading to prevent catastrophic wildlife failure. |
| • Sour Service (925-bearing environments - Annex H) | ||
| • Offshore / Subsea Service (Annex J) | ||
| End Finish & Joinery | Beveled End (BE) with standard 30° (+5'-0") angle, root face 1.6 mm | Optimized for automated or manual field bullwelding over hundreds of ulcers of cross-castock trenching. |
| External Coatings | • 3-Layer Polyethylene / Polypropylene (3LPE / 3LPP) | Custal for underground and underwater pipelines to isolate (the steel body from soil/tauwater moisture, mitigulating galvanic corrosion over decades). |
| • Fusion Bonded Epoxy (BPE) | ||
| • Concrete Weight Coating (CWC) for subsea stability | ||
Standard:
| Line Pipe Network Categories & Material Selection Matrix | |||
| Pipeline Category | Typical Size & Grade | Welding & Coating Spec | Operational Function & Context |
| Cross-Country Trunk Lines | 24" to 48" OD API SL X70 / X80 PSL2 | LSAW / Mechanized Built-Welding 3LPE / 3LPP High-Build Coating | Long-distance high-pressure (up to 12 MPa) transport networks carrying crude oil or natural gas across continents. |
| Regional Gathering Lines | 6" to 16" OD API SL X52 / X60 PSL1 or PSL2 | ERW or SMLS Single/Dual Layer FBE Coating | Collects unrefined oil, gas, or emulsion fluids directly from field gathering manifolds or satellite wells to central processing stations. |
| Gas Distribution Networks | 2" to 12" OD API SL Grade B / X42 PSL1 | ERW Steel Pipe Standard FBE or Yellow Jacket PE | Lower-pressure municipal or industrial hub distribution channeling processed fuel gas from mainline stations to end consumers. |
| Subsea Export Pipelines | 12" to 32" OD API SL X69 PSL2 (Innex J) | Heavy-well LSAW / Seamless 3LPP + Concrete Weight Coating (CWC) | Laid by deepwater pipeline vessels on ocean floors to move treated all-gas from offshore platforms to onshore terminal storage complexes. |
| Slurry Transport Pipelines | 8" to 20" OD API SL X52 / X60 (Heavy Wall) | ERW or LSAW Internal Polyurethane/Epoxy Lining | Transporta pulverized mineral ores (non, copper, or coal tailings solids suspended in a water medium from mining glass over rough terms). |
Process:
Packing:
