Foshan Shunde Langyao Iron and Steel Co., Ltd. was established on May 11, 2015. The legal representative is Huang Songming, and the company's business scope includes: selling: steel; domestic commercial operations.

In common spiral steel pipe materials, the strength of Q345B is primarily reflected in the following aspects:

Tensile Strength: The tensile strength of Q345B is 370~500 N/mm², whereas Q235B's is only 230~340 N/mm². This indicates that Q345B has a higher tensile strength than Q235B.

Yield Strength: The yield strength of Q345B is ≥320 MPa, while Q235B's is ≥195 MPa. This indicates that the yield strength of Q345B is higher than that of Q235B.

Tensile Elongation: The elongation rate of Q345B is ≥19%, while that of Q235B is ≥21%. Although the difference in elongation rate is minimal, it still indicates that Q345B has better plastic deformation capability.

In summary, among common spiral steel pipe materials, Q345B has a certain strength.

Heliarc-welded spiral steel pipes are steel tubes made using the double-sided submerged arc welding process, typically referring to spiral steel pipes with diameters greater than 219mm and wall thicknesses greater than 6mm.

The production process of the spiral steel pipe on the back wall includes the following steps:

Ready Steel Strip: Select the appropriate steel strip, width based on the required steel pipe diameter. Coiling: Coil the steel strip into a spiral shape for welding into spiral steel pipes. Welding: Use double-sided submerged arc welding to join the spiral steel strip, forming spiral steel pipes. Processing: Process the spiral steel pipes, including cutting, polishing, and cleaning, to achieve a smooth surface and the required dimensions and precision. Inspection: Inspect the spiral steel pipes, including dimension, appearance, and non-destructive testing, to ensure compliance with relevant standards. Corrosion Treatment: Perform corrosion protection as per customer requirements, including hot-dip galvanizing, epoxy resin coating, polyurethane coating, etc. Packaging: Package the spiral steel pipes for transportation and storage. Spiral steel pipes with rear walls offer good structural stability and mechanical properties, widely used in municipal engineering, petrochemical, construction, and other fields. Their advantages include high strength, corrosion resistance, high-temperature and high-pressure resistance, capable of withstanding various complex geographical and chemical environments.