ERW Steel Pipe DN168 API 5CT J55 For Casing And Tubing Applications

Engineered for the rigorous demands of enhanced oil recovery (EOR), Huayang's DN700 API 5L X42 pipes feature a balanced carbon-manganese chemistry that facilitates superior field weldability while maintaining high internal pressure ratings. The 711.2mm ERW sections are manufactured using state-of-the-art high-frequency induction welding, resulting in a consistent longitudinal seam that undergoes 100% ultrasonic testing to ensure zero-leak performance. Unlike smaller diameter lines, our DN700 units are specifically optimized for large-volume water throughput, minimizing frictional head loss across expansive injection grids. As a premier manufacturer, Huayang subjects these pipes to stringent hydrostatic verification and dimensional calibration, providing a durable, corrosion-resistant solution for sub-surface pressure maintenance and centralized water distribution in mature oilfield developments.