How to Test the Quality of Industrial Spiral Steel Pipes

1. Examine the surface of the spiral steel pipe to assess its manufacturing process. Generally, analysis of the spiral steel is necessary. Inferior spiral steel pipes often have an elliptical cross-section. This is because manufacturers save on raw materials, resulting in slightly larger reductions in the first two rollers before finishing. This significantly reduces the compressive strength of the spiral steel pipe and does not conform to the specifications of high-quality spiral steel products. High-quality spiral steel pipes have symmetrical composition, high cold shearing tonnage, and smooth, neat inner holes in the cutting head. Counterfeit and inferior materials, due to their poor quality, often result in uneven cut holes and a lack of metallic texture.

2. Tap the spiral steel pipe and listen to the sound. A crisp sound with a clear echo indicates that the spiral steel pipe is made using new material technology, rather than being a recycled product of waste spiral steel pipes.

3. Inspecting the shape of the butt weld seam of spiral steel pipes is a simple and widely applicable testing technique. It is an important aspect of finished product quality inspection, crucial for identifying defects and dimensional errors on the weld surface. Generally, testing is conducted using human eyes, relying on specialized tools such as specification models, instruments, and high magnification glasses. If there are defects on the welded surface, there will also be defects inside the weld.