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Core principles of hot-rolled seamless pipe production: Heating and piercing a solid steel billet → rolling into a hollow tube shell → multi-pass wall reduction and sizing → cooling and finishing. The process involves no weld seams, resulting in superior overall pressure-bearing performance.

Features of spiral welded pipes: It can produce large-diameter, thick-walled steel pipes, has strong pressure-bearing capacity, long single pipe length, and the cost is suitable for large pipe diameters. The welding seam is spiral. It mainly focuses on medium and large pipes above DN300, and is mostly used for burial, long-distance transportation, and large steel structures.

Produced via continuous forming from hot-rolled or cold-rolled steel strip coils, the process ensures high raw material utilization and a streamlined workflow. Costs per ton are 10%–30% lower than those of seamless or spiral-welded pipes, offering significant advantages for bulk procurement.