Steel tube manufacturers reminds us welded steel pipe prior to a special pre-treatment of the steel surface to enhance corrosion resistance and adhesion to steel and plastic steel to improve the peel strength. In addition, there is welded construction elements: ① check before welding the pipe to be welded at both ends of the cutting surface is smooth (if the end face is not flat, it should be repaired). ② welding electrodes used in pipe production plant infrastructure should normally be provided, require the production of pipes and polyethylene material used in the same or blending good material and pipe welding. ③ welding area must be clean, dry, trim work can be carried out from the outside of the tube or pipe (φ800 pipe above). ④ welding electrodes used in pipe production plant infrastructure should normally be provided, require the production of pipe and steel pipe materials used in the same or a blending of good material and pipe welding. In general, when carrying out welding steel tube manufacturers, hot air must be installed disposal pipe welding seam terminated polyethylene preheating, so that the extruded molten polyethylene can be integrated with the pipe. This article is taken from: http: //www.sdzpkmgy.com