Seamless steel pipes feature hollow sections and are extensively used as pipelines for conveying fluids, such as oil, gas, water, and certain solid materials. Compared to solid steel products like round bars, they are lighter in weight while maintaining equivalent bending and torsional strength. As an economical cross-section steel, they are widely employed in the production of structural components and mechanical parts, including oil drill pipes, automotive propshafts, bicycle frames, and steel scaffolding for construction. Manufacturing circular parts from steel pipes enhances material utilization, simplifies production processes, and saves materials and labor, making it a widely used material for pipe fabrication.