Carbon steel pipe is a type of steel pipe made of an alloy of carbon and iron. It is mainly composed of carbon and iron, and also contains trace amounts of other elements such as manganese, silicon, sulfur and phosphorus. The carbon content in carbon steel pipe ranges from 0.04% to 2.1% by weight. Seamless carbon steel pipe is a pipe made of ingot or solid round steel, perforated into rough pipe, and then hot rolled, cold rolled or cold drawn. Carbon steel pipe occupies an important position in the steel pipe industry. Carbon steel pipe is divided into two categories: hot rolled and cold rolled (drawn) steel pipe. Hot rolled carbon steel pipe is further divided into general steel pipe, medium and low pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other steel pipes. Carbon steel pipe also has a variety of manufacturing types, which will be introduced in detail below.