What is the material of the spiral pipe?

Spiral pipes are crafted from strip steel coils, which serve as the primary material. This steel is shaped at room temperature and joined through a specialized welding process known as automatic double-wire double-sided submerged arc welding. The manufacturing process begins by feeding strip steel into the pipe forming unit. Through the action of several rollers, the steel strip is progressively formed into a circular pipe shape with a slight gap along the seam. The gap is meticulously managed to be between 1 to 3mm, ensuring that the ends of the pipe seam align perfectly.

Materials used to make spiral pipes include a variety of steel grades such as Q235A, Q235B, 10#, 20#, and Q345 (16Mn), among others. High-grade materials like L245(B) through L555(X80) and their equivalents in NB/MB grades are also utilized, catering to diverse application requirements.

The production process of spiral pipes involves several key steps:

1. Selection of high-quality strip steel coils, welding wires, and fluxes, all of which undergo rigorous testing before use.
2. Strip steel ends are joined by submerged arc welding, with additional repair welding as needed.
3. Preparation steps include leveling, trimming, planing, and cleaning the strip steel.
4. Advanced forming techniques ensure the smooth transfer and correct shaping of the strip.
5. The use of controlled welding processes guarantees a consistent and high-quality seam.
6. Continuous ultrasonic inspection detects any flaws in the welding, ensuring the integrity of the pipe.
7. Each pipe is cut, inspected, and tested thoroughly to maintain high standards of quality.
8. The finished pipes undergo hydrostatic testing and precise end machining to meet specific requirements.

Notable for its uniform deformation and minimal residual stress, spiral pipe manufacturing allows for a wide range of diameters and wall thicknesses. The advanced welding technology used in production minimizes common welding issues, ensuring superior quality. Moreover, the entire production process is closely monitored and controlled, ensuring that each spiral pipe meets stringent quality standards.

When storing spiral pipes, it’s crucial to follow specific guidelines to maintain their condition and prevent damage. These guidelines include organizing pipes by type and size, ensuring stable and safe stacking, protecting pipes from corrosive materials, and keeping them off the ground to avoid moisture and deformation. Proper storage practices, including adequate support and positioning, help preserve the quality and integrity of spiral pipes until they are ready for use.