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

Tensile Strength: The tensile strength of Q345B is 370~500 N/mm², whereas Q235B's tensile strength 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 yield strength is ≥195 MPa. This indicates that Q345B has a higher yield strength than Q235B.

Tensile elongation: The elongation rate of Q345B is ≥19%, while that of Q235B is ≥21%. Although the difference is not significant, it still indicates that Q345B has better plastic deformation capability.

In summary, among common spiral steel pipe materials, the strength of Q345B.

Foshan Shunde Langyao Iron and Steel Co., Ltd. was established on May 11, 2015. The legal representative is Huang Songming, and the company is engaged in the sale of steel products and domestic commercial activities.

The characteristics of spiral steel pipes mainly include the following aspects:

High strength: Spiral steel pipes are made from high-strength steel plates, offering high strength and toughness, capable of withstanding significant internal and external pressures. Excellent welding properties: Produced using continuous welding methods, spiral steel pipes have high-quality seams, ensuring strength and sealing at the welds. Additionally, the seams are of high quality, with the main stress being hoop stress, and the spiral welds at a 45-degree angle to the axis, avoiding the main stress; the longitudinal welds in straight seam pipes are perpendicular to the main stress. Versatile: Spiral steel pipes can be manufactured in various diameters, wall thicknesses, lengths, and materials to meet engineering requirements in different environments and conditions. Easy and quick installation: The diameter and length of spiral steel pipes can be adjusted as needed to meet different construction requirements. Moreover, with mature installation techniques, they can be installed manually or mechanically, ensuring rapid construction. Cost-effective: The mature production process allows the use of the same width of steel strip to produce pipes of different diameters, with adjustable forming and interchangeable specifications, facilitating mass production and achieving mechanization, automation, and continuity. Therefore, spiral steel pipes are relatively low in price and cost-effective. Smooth inner wall: The smooth inner wall of spiral steel pipes enhances transport efficiency. Large diameter range: The specifications for spiral-welded pipes range from Φ219-1420mm, even up to 3860mm. Corrosion-resistant: Spiral steel pipes have strong corrosion resistance, capable of withstanding corrosion from various chemicals. Water and vapor impermeable: The seams of spiral steel pipes are焊接 using spiral submerged arc welding technology, ensuring the sealing of the welds and preventing water and vapor permeation. In summary, spiral steel pipes possess multiple excellent characteristics such as high strength, good welding properties, versatility, ease of installation, cost-effectiveness, smooth inner wall, large diameter range, strong corrosion resistance, and water and vapor impermeability, making them widely applicable in various engineering fields.