LSAW Steel Pipe

Tianjian Xinyue Steel Group manufactures LSAW steel pipes using longitudinal submerged-arc welding processes, including UOE, JCOE, and RBE forming methods. These pipes are engineered for heavy-wall, large-diameter applications, with outer diameters ranging from 355.6 mm to 1626 mm and wall thicknesses between 8 mm and 50 mm. The standard length is up to 12 m, making them suitable for long-distance, high-pressure fluid delivery systems in oil and gas transmission, water supply, and structural projects. The material grades span API 5L GR B through X80, as well as ASTM A53 GR A, B, and C, ensuring compatibility with diverse industrial requirements.

The pipes conform to API 5L, ISO 3183, and GB/T 9711 standards, with chemical compositions and mechanical properties rigorously tested. For example, API 5L X70 grade pipes have a minimum yield strength of 485 MPa and a tensile strength of 570 MPa, with elongation of at least 21% in 2 inches. Surface coatings include fusion bond epoxy, coal tar epoxy, 3PE, vanish coating, bitumen coating, and black oil coating, tailored to environmental conditions. Typical industry standards for LSAW pipes also include hydrostatic testing at 1.5 times the nominal pressure and non-destructive testing such as X-ray and ultrasonic inspection to ensure weld integrity.

These pipes are primarily used in oil and gas transmission networks, water pipelines, and large-scale structural projects where durability and pressure resistance are critical. Buyers typically include EPC contractors, pipeline operators, and infrastructure developers sourcing for high-capacity fluid transport. Tianjian Xinyue Steel Group offers customization in steel grades, dimensions, and coatings, with mill test certificates issued to EN 10204/3.1B. The pipes are delivered in bundles with protective packaging, and buyers are advised to confirm specific certifications, such as API 5L PSL1 or PSL2, as well as additional testing requirements like flattening, bending, or impact tests.

Tianjian Xinyue Steel Group is based in the Daqiuzhuang Industrial Area, Tianjin, China, a region known for its concentration of steel manufacturing and heavy industry. The company specializes in the production of large-diameter LSAW steel pipes, leveraging advanced submerged-arc welding technologies to serve global markets, particularly in oil and gas transmission and structural applications. Its harbor trust tier signals a baseline level of verification, though the response rate and average response hours are currently not available, indicating a need for buyers to proactively reach out for detailed inquiries.

The supplier’s profile confirms its focus on LSAW pipes meeting international standards such as API 5L and GB/T 9711, with certifications including API 5L PSL1 and PSL2. The company provides mill test certificates in compliance with EN 10204/3.1B, ensuring traceability and quality assurance for each batch. While the profile does not specify production capacity or client history, the technical depth of its product specifications and adherence to recognized standards positions it as a reliable source for large-scale pipeline projects.