Structural Pipe ERW Steel Pipe DN300

For structural engineering applications, DN300 ERW pipes are commonly manufactured using S355J2H or Q355B structural steel. These materials provide a minimum yield strength of approximately 355 MPa and tensile strength typically ranging from 470 to 630 MPa, ensuring strong load-bearing capability in steel frame systems. The controlled chemical composition generally keeps carbon below about 0.20 percent, while manganese around 1.60 percent improves toughness and structural reliability.

Huayang Steel Pipe produces these structural pipes using advanced high frequency electric resistance welding technology, which forms a continuous and uniform longitudinal weld seam with stable metallurgical properties. Precise forming and calibration processes ensure accurate outside diameter and consistent wall thickness along the pipe length. Each pipe undergoes ultrasonic inspection of the weld seam, dimensional measurement, and mechanical performance verification to ensure compliance with structural engineering requirements in large-scale building and infrastructure projects.