High-frequency welded pipe equipment is welded by High-frequency currents in welding induction coil which create a strong electromagnetic field. Under the environment of electromagnetic field, Because of the skin effect and kindred effect, the V-region of the welded steel pipe would reach the melting temperature. After melting the welded steel pipe would be shaped by the pressure of squeeze roller. The products widely used in some metal pipes inductive melding such as Bike tube, furniture tube, water pipes, gas pipes. It also applies to Aluminum tube and stainless steel pipe