The seamless steel pipe is a steel pipe made of a single piece of metal with no seams on its surface. According to the production method, the seamless pipe is divided into a hot rolled pipe, a cold rolled pipe, a cold drawn pipe, an extruded pipe, a top pipe, and the like. Seamless steel tubes hav

Spiral steel pipe is a spiral seam steel pipe which is made of steel coiled coil as raw material, which is often heated and extruded, and welded by automatic double wire double-sided submerged arc welding process. The advanced double-sided submerged arc welding process can achieve welding at the be

The welding pipe is a steel pipe made by welding or forming a steel plate or strip. The welded steel pipe has a simple production process and high production efficiency. And it has high strength in order to make sure the stable operation with excellent performance. It can be divided into many kinds