Спиральношовная стальная труба

Spiral welded pipes (SSAW) are manufactured by forming hot-rolled steel coils into a spiral and welding both the inside and outside with submerged arc welding (SAW). This production method allows for exceptionally large diameters up to DN3620 while maintaining excellent dimensional accuracy and weld quality. Our SSAW pipes conform to API 5L and SY/T5037 standards and undergo 100% ultrasonic testing of the weld seam.

The spiral weld geometry distributes stress more evenly around the pipe circumference, providing inherent resistance to hoop stress in pressurized applications. These pipes are widely used for long-distance water transmission, sewage treatment, structural piling, and oil & gas trunk pipelines where large diameter and cost-effectiveness are primary requirements.