High-frequency welding process of steel tube, mainly using high-frequency current having a skin effect and proximity effect both characteristics, so that current is highly concentrated on the edge of the weld surface, so that the welding edges of the tube was heated in a very short period of time to the desired soldering temperature, and then after squeezing a tube welded tube synthesis. High frequency welding technology has many advantages, for tube and pipe sizes of materials wide adaptability. Not only high-frequency welding welding speed increase and get a small heat-affected zone and burn through good weld. Because of the high frequency weld pipe with good quality, both inside and outside a small glitch, high welding speed, lower power dissipation, etc., has been widely used and promoted. The pipe unit, usually of the opposite sex can produce pipes, and produce more square, rectangular tube, because of square, rectangular tube has a large section modulus, can withstand greater bending strength, can save a lot of metal, saving processing time and reduce the component weight, etc., and therefore increasingly being used to promote all aspects of industry and agriculture. Frequency welded pipe production equipment with no pollution, low noise characteristics, does not produce waste water, waste gas. Production by circulating water cooling, energy saving and environmental protection. Provincial labor, single shift only 5-8 people can be. Welding speed fast, φ76 unit welding speed of up to 20-70 m / min. 

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