Carbon steel pipe is a pipe made of carbon steel as raw material, with high strength, good toughness, can withstand a certain pressure, widely used in industrial production to transport water, oil, natural gas and other fluid media, as well as in construction, machinery manufacturing and other fields as a structural support, its specifications are diverse, can be welded, threaded connection and other ways to install, because of its excellent versatility, become one of the indispensable basic materials in many engineering projects.