What is the High-frequency Welding?

High-frequency welding is a welding method that using resistance heat produced by high-frequency current flowing through workpiece serial interface to heat, and in the case of applying forging force, makes the workpiece metal to be interconnected. It is similar to ordinary resistance welding, but there are also many important differences. High-frequency welding for carbon steel pipe production has been 40 years of history. With a larger power supply, high-frequency welding can achieve a higher welding speed (higher than the maximum welding speed of TIG welding more than l0 times) for the different materials, caliber and wall thickness of the steel pipe. So high-frequency welding has a high productivity in the production of general-purpose steel pipe. But high frequency welding speed usually makes removing the burrs difficult. This is also one of the reason why high-frequency welded steel pipe is not accepted yet by the chemical industry and the nuclear industry currently.