The main technical points of spiral steel pipe:

The main technical points of spiral steel pipe:

1. The steel plate deforms uniformly during the forming process, resulting in small residual stress and a scratch-free surface. The processed spiral steel pipe offers greater flexibility in diameter and wall thickness range, particularly for high-grade thick-walled pipes, especially small and medium-diameter thick-walled pipes. This process has advantages that other methods cannot match and can meet user needs. The spiral steel pipe specifications have more requirements.

   
   

  2. Advanced double-sided submerged arc welding technology allows for optimal position welding, reducing the likelihood of issues such as edge errors, welding deviations, and defects, and facilitating better control of welding quality.

  3. To ensure product quality, steel pipes undergo 100% quality inspection throughout the production process for effective detection and monitoring.

  4. The equipment in the production line is designed to network with the computer data collection system for real-time data transmission. The central control room controls the technical parameters in the production process.

  5. The raw materials are coiled pipe, wire and flux. Strict physical and chemical inspections are required before entry.

  6. Remove the steel head and tail butt joints, use single or double wire submerged arc welding to roll it into a steel pipe, and perform automatic submerged arc welding repair.

  7. Before forming, the strip is leveled, trimmed, planed, surface cleaned, transported and pre-bent.

  8.  Use electrical contact pressure gauges to control the pressure on both sides of the conveyor to ensure smooth transportation of the steel belt.

  9. Use external control or internal control of roll shape.

10. To ensure that the welds meet the welding requirements, it is recommended to use welding control devices. Additionally, strict control of the pipe diameter, dislocation, and welds is necessary.

11. To achieve consistent welding quality, the American Lincoln welding machine utilises single-wire or double-wire submerged arc welding for both internal and external welding.