Characteristics of Double-Sided Submerged Arc Spiral Steel Pipes

1. Uniform Deformation: During forming, the steel plate deforms evenly with minimal residual stress, reducing the likelihood of surface scratches.

2. Size Flexibility: Spiral steel pipes offer greater flexibility in diameter and wall thickness dimensions.

3. Advanced Welding Process: Utilizes an advanced double-sided submerged arc welding process, allowing for optimal welding positioning.

4. Quality Assurance: Undergoes 100% quality inspection with strict monitoring to ensure product quality.

Considerations for Weld Seam Handling:

1. Excessive Gap: Can decrease the proximity effect, leading to insufficient eddy current heat and poor weld quality, resulting in cracks.

2. Insufficient Gap: Increases the proximity effect, causing excessive welding heat and potential seam burn damage.

3. Heat and Extrusion: Proper heating and extrusion of the pipe edges are crucial to avoid deep pits and ensure weld seam surface quality.

4. Insufficient Extrusion Force: Leads to fewer common crystals and lower weld seam metal strength, causing potential cracks under stress.

5. Excessive Extrusion Force: Forces molten metal out of the weld seam, reducing weld strength and creating excessive internal and external burrs, potentially leading to weld overlap defects.