The production of PP plastic flange protection cover requires mold to be injection molded or cast, which has high production cost and low dimensional adaptability, and the material of the existing PP plastic is not gas permeable, which causes the pipe and the flange piece to be easily thermally expanded, thereby causing the pipe flange cover. Fall off.

The polypropylene flange protection cover has the advantages that the lower end and the bottom surface are made of polypropylene non-woven fabric or composite leather, the upper end is made of soft material and surrounds to form an open end; and the side wall is provided with a diameter for adjusting the opening end. Adjustment parts. The bottom surface of the flange protection cover and the lower end of the side wall are made of polypropylene non-woven fabric or composite leather. It has the advantages of breathable, environmental protection, wear resistance, oil proof, waterproof, anti-solar radiation aging, small specific gravity, etc., which effectively reduces the pipeline. The internal temperature and the transportation cost are greatly reduced. By adjusting the diameter of the open end, it can be applied to tubes of various diameters, which reduces the production cost.