a. During the forming process, the steel plate deforms uniformly with minimal residual stress and no surface scratches are produced. The spiral steel pipes processed offer greater flexibility in diameter and wall thickness specifications. They have unparalleled advantages in producing high-grade thick-walled pipes, especially medium and small diameter thick-walled pipes, and can meet users' more diverse requirements for spiral steel pipe specifications.

b. Utilizing advanced double-sided submerged arc welding technology, welding can be achieved in place, reducing the likelihood of defects such as misalignment, welding offset, and incomplete fusion, and ensuring easy control over welding quality.