The welded seam reheating treatment of the straight seam pipe is an effective methods to improve the quality of the welding quality, and the welded seam is heated to more than 800 ° C, and then naturally cooled (annealed) or forced cooling (normalizing) with a fan, which can effectively improve the ......
Read MoreStraight seam pipes contact welding : Usually, induction welding is used in the straight seam pipes production, which put the copper inductor on the needed welding open seam pipes.by using the electromagnetic induction principle,a strong high frequency current surrounding the steel tube is induced i......
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