Stainless steel seamless pipes are generally treated before leaving the factory, and there will be no rust on the surface. However, some rust stains that are difficult to remove may appear when they are used for a long time and the use environment is harsh.

Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, extruded at regular temperature, and welded by automatic double-wire double-sided submerged arc welding process.