Pipe molding can only follow two specific techniques that result in either seamless steel or welded pipe. Crude raw material such as ore or scrap metal cast into ingots is the first step. The last step of the fabrication process is to shape the pipes by extending the seamless tube.The seamless steel and welded pipes manufacturing process are different, and both have got other properties. Study the table below to determine which steel pipe you will choose to help you get the desired outcome.