HFW Welded Pipe DN500 API 5L X60 PSL2 For Natural Gas Pipeline

API 5L X60 PSL2 is a high-strength pipeline steel with a minimum yield strength of approximately 415 MPa and tensile strength ranging from about 520 to 760 MPa. The chemical composition is tightly controlled, typically limiting carbon to around 0.22 percent while maintaining manganese levels between 1.30 and 1.60 percent. Microalloying elements such as niobium and vanadium are often added to refine grain structure and improve toughness. Compared with PSL1, PSL2 imposes stricter limits on sulfur and phosphorus, along with mandatory impact testing and non-destructive examination, ensuring higher reliability and fracture resistance in gas transmission systems.

Huayang Steel Pipe manufactures DN500 HFW pipes using advanced high-frequency welding technology, forming a uniform and continuous longitudinal weld seam with stable metallurgical properties. Precision forming ensures accurate outer diameter and consistent wall thickness along the pipe body. Each pipe undergoes weld seam ultrasonic inspection, hydrostatic pressure testing, and full dimensional verification. For natural gas applications, external anti-corrosion coatings such as 3PE or FBE are commonly applied to enhance resistance to soil corrosion and ensure long-term service stability.