Abstract: Briefed in the paper are the basic principles of contact welding and induction welding，and compared are their advantages and disadvantages.Based on the analysis of defects shown in single-tip contact welding，the techonology of double-tip contact welding for HFW pipe is introduced，concerning the selection of electrode material，the development of double-electrode contact mode installing system and cooling system，and the development of the strip steel edge descaling device.The practical application results indicate that CuCrZr is a suitable material for making electrodes for double-tip contact welding.When double-tip contact welding is being applied，no spark occurs and the welding quality is stable with the weld quality in compliance with API Spec 5L—2012 specification.