Different ways of making steel pipes
Steel pipes are classified into two types: seamless steel pipes and welded steel pipes according to their manufacturing methods. The seamless steel pipe is made of high-quality carbon steel or alloy steel and has hot rolling and cold rolling (extraction). The welded steel pipe is formed by welding a steel plate rolled into a tubular shape by a seam or a spiral seam. In terms of the manufacturing method, it is further divided into a welded steel pipe for low-pressure fluid transportation, a spiral-welded electric steel pipe, a direct-wound welded steel pipe, an electric welded pipe, and the like. Seamless steel tubes can be used in a variety of liquids, gas pipelines, and the like. Welded pipes can be used for water pipes, gas pipes, heating pipes, etc. 1. Welded steel pipe 1.1 Welded steel pipe and galvanized welded steel pipe for low pressure fluid transportation The welded steel pipe for low-pressure fluid transportation is made of carbon soft steel. It is the most com...