Welded pipe is using the materials, such as steel belt or plate stuff, as the steel pipe joint on the surface, which makes the welded can bend into round or triangle shape. That makes the tube shape. Welded steel pipe is formed in 1.0m for the pipe diameter and more than 10mm thick from the steel plate. In the industrial field, we can see lots of application of this welded steel pipe is being used, such as shipment delivery and the basic structural materials for building and factories, etc. Therefore, lots of customers can are satisfied in meeting this pipe. They can ask for special requirements on the quality, specifications and even the size. More originally, we are using this pipe in transporting gas, liquid and even the heating. We are using them in delivering water through the country and providing necessity for the resident.