Measures to Avoid Warping at the End of 3PE Anticorrosive Steel Tube
The three-layer polyethylene (3PE) anticorrosive coating has been widely used in the petroleum pipeline industry due to its good corrosion resistance, water vapor permeability resistance and mechanical properties. This kind of anti-corrosion coating steel pipe end is prone to warping problems due to corrosion. It is analyzed that when the 3PE anti-corrosion layer steel pipe is grinding the groove of the polyethylene layer of the reserved section, the weld height of the pipe end is not ground or the ground is uneven, which will cause the epoxy powder at the bottom of the polyethylene bottom of the welding seam to be abraded. When the anti-corrosion pipe is stacked in the open air for a long time, the surface metal of the weld will be corroded first, which will cause the phenomenon of warping of the 3PE anti-corrosion layer. The measures to avoid warping at the end of the 3PE anti-corrosion layer are: 1. Under the condition of not affecting the welding of the nozzle, the res...