LSAW Steel Pipe – High-Quality Longitudinal Submerged Arc Welded Pipes for Industrial Applications Discover premium LSAW steel pipes engineered for durability, performance, and compliance with international standards. These longitudinal submerged arc welded pipes are ideal for low-pressure fluid transport in oil, gas, and water systems across global infrastructure projects. Designed using advanced manufacturing techniques such as UOE (Unguided Oiling Equipment), JCOE (Joint Creation and Opening), and RB (Rolling Bending), these pipes ensure consistent quality, structural integrity, and long-term reliability. Key Features: - Manufactured under API 5L, API 5CT, ASTM A53, EN 10217, DIN 2458, and GB/T standards - Available in diameters from 8 inches to 72 inches (219.1mm to 1820mm) - Material grades include API 5L GR B, X42–X70, ASTM A53 GR A/B/C, EN S275JR/S355JRH, and GB Q195–L555 - Surface finishes customizable: Fusion Bond Epoxy, Coal Tar Epoxy, 3PE, Bitumen, Vanish Coating, or Black Oil coating per client specifications - Comprehensive testing protocols including chemical composition analysis, mechanical strength verification, flattening, bending, hydrostatic, X-ray, impact, and blow tests - Mill Test Certificate (EN 10204/3.1B) provided for full traceability and quality assurance Detailed Description: LSAW pipes are produced by welding high-strength steel plates longitudinally using a submerged arc welding process, resulting in seamless joints that offer superior pressure resistance compared to other pipe types. The manufacturing process—whether through UOE, JCOE, or double submerged arc welding (DSAW)—ensures precise control over dimensional accuracy, weld consistency, and internal structure. These pipes meet stringent requirements for corrosion resistance, tensile strength, and ductility, making them suitable for both above-ground and buried installations in harsh environments. With surface treatments tailored to environmental conditions—from coastal areas to arid regions—these pipes provide extended service life and minimal maintenance needs. Ideal Use Cases: These pipes are widely used in pipelines for transporting natural gas, crude oil, refined petroleum products, and potable water. They serve critical roles in onshore and offshore energy projects, municipal water supply networks, industrial processing plants, and cross-country transmission systems. Their compatibility with various coatings ensures adaptability to diverse soil compositions, temperature fluctuations, and chemical exposure levels. Whether deployed in pipeline construction, retrofitting existing lines, or supporting new infrastructure development, LSAW steel pipes deliver unmatched value. Customer Feedback: Users consistently highlight the exceptional weld quality, ease of installation, and robustness under variable operating pressures. Many engineers appreciate the detailed mill test reports and the ability to customize surface protection based on project-specific challenges. Clients report reduced downtime due to fewer leaks and improved flow efficiency when compared to older pipe technologies. Frequently Asked Questions: What makes LSAW pipes different from ERW or spiral welded pipes? LSAW pipes feature longitudinal welds formed under controlled conditions, offering greater uniformity, higher tensile strength, and better resistance to internal pressure than spirally welded alternatives. This makes them more suitable for demanding applications. Can I request custom coating options? Yes, customers can choose from multiple protective coatings—including 3PE, fusion bond epoxy, bitumen, or coal tar epoxy—to suit environmental conditions like soil acidity, moisture levels, or cathodic protection requirements. Are these pipes certified for international use? Absolutely. All pipes comply with globally recognized standards such as API 5L PSL1/PSL2, EN 10217, and ASTM A53, ensuring they meet the technical and safety expectations of international markets outside China and its territories.
Product Categories : Steel Pipe > Seamless Steel Pipe
