How to judge the quality of spiral steel pipe commonly used in projects

1. Inspect the surface of the spiral steel pipe to determine if the production process is sophisticated. This generally requires analysis of the spiral steel. Counterfeit and inferior spiral steel pipe has an oval cross-section. This is because the manufacturer saves on raw materials, using slightly less reduction on the first two rollers before the finished product is finished. This significantly reduces the compressive strength of the spiral steel pipe and does not meet the specifications and dimensions of spiral steel products.

High-quality spiral steel pipe has symmetrical components, high cold shearing capacity, and a smooth, uniform internal bore. Counterfeit and inferior material, however, suffers from these inferior materials, and, due to frequent use, the bore of the cut head can be uneven and lack a metallic texture.

2. Tap the spiral steel pipe and listen for the sound. If the sound is crisp and the echo is not chaotic, it indicates that the spiral steel pipe is made with new materials and technology, rather than recycled or discarded spiral steel pipe.

3. Inspecting the shape of spiral steel pipe butt welds is a simple, universally applicable inspection method and a key component of finished product quality testing. The key is to identify surface defects and dimensional deviations in the welds of the spiral steel pipe. Generally, the test is based on human visual inspection and relies on special tools such as specification models, meters, and high magnifying glasses. If there are defects on the weld surface, there will also be defects inside the weld.