Pipa baja yang mulus adalah pipa baja yang dibuat dengan menusuk baja bulat utuh tanpa lasan di permukaan, yang disebut pipa baja yang mulus. 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 Pipa untuk mobil, traktor, dan penerbangan.