O tubo de aço sem costura é um tubo de aço feito perfurando um aço redondo inteiro sem solda na superfície, que é chamada de tubo de aço sem costura. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold drawn seamless steel pipes, extruded seamless steel pipes, top pipes, etc. Seamless steel pipes are mainly used as drilling pipes for petroleum geology, cracking pipes for petrochemicals, boiler pipes, bearing pipes, as well as high-precision structural steel pipes for Automóveis, tratores e aviação.