What are the causes of wear on flat welding flanges in Hebei Shengtian Pipe Fitting Group Co., Ltd.? Before inquiring about how to reduce the wear on flat welding flanges, we should first understand the causes of their wear. As pipe fittings roll within the cylinder, friction between the material and both surfaces gradually wears them down: the diameter of the pipe fittings gradually decreases, and the inner diameter of the cylinder gradually increases.

As the diameter gap between the fittings and the pipe gradually increases, the fit between them will gradually become looser. This phenomenon also increases the material's residence time in the extruder barrel, contributing to material variations. In the case of polyvinyl chloride (PVC), the increased concentration of hydrogen chloride gas will exacerbate corrosion of the pipe fittings and barrel. It is expected that fillers such as calcium carbonate and glass fiber will accelerate the wear of the fittings and barrel.

Due to uneven plasticization of the material or the presence of metallic foreign objects, the sudden increase in the pipeline's rolling torque occurred. This torque exceeded the pipeline's strength limit, resulting in distortion and fracture. This is a regular type of accident damage that may affect wear conditions. The pipeline components should be considered for distortion based on the actual inner diameter of the cylinder, and the outer diameter error of the new pipe should be assigned according to the normal clearance with the cylinder, in order to halt production.

The threaded surface of worn pipes with reduced diameters is treated, followed by thermal spraying with wear-resistant tungsten carbide alloy, and then ground to the required size. Local welding of wear-resistant tungsten carbide alloy is applied to the worn pipe threads. Depending on the horizontal weld wear of the pipe fittings, a thickness of 1-2mm is applied, and then the fittings are ground to a certain size. This wear-resistant tungsten carbide alloy is composed of materials such as C, Cr, Vi, Co, W, and B, enhancing the pipe fittings' wear and corrosion resistance.