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BEIHAI YUEDA FRP PRODUCTS
Analysis of the Corrosion Resistance and Water Resistance of Fiberglass Woven Winding Pipes
Release time:
2021/08/13
In recent years, with the vigorous development of urban power grid renovation work, urban power grids have gradually shifted from overhead lines to underground cable forms, leading to the increasingly widespread use of cable protective conduits. With the rapid development of underground power cable laying projects, higher requirements have been placed on cable conduits. Due to the extensive coverage area of cable laying, it inevitably passes through humid saline-alkali areas, such as marshes and coastal regions, which imposes very high requirements on the corrosion resistance and water resistance of cable protective conduits. Traditional pipe materials, especially steel pipes, often suffer from rust and corrosion after long-term use due to their material properties.
In recent years, with the vigorous development of urban power grid renovation work, urban power grids have gradually shifted from overhead lines to underground cable forms, thus the application of cable protective casings has become increasingly widespread. With the rapid development of underground power cable laying projects, higher requirements have been placed on cable casings.
Due to the wide coverage area of cable laying, it inevitably passes through humid saline-alkali areas, such as marshes and coastal regions, which places very high demands on the corrosion resistance and water resistance of cable protective casings. Traditional pipe materials, especially steel pipes, often suffer from rust and even damage after long-term use due to their material properties, leading to the entry of silt, water, and other substances into the pipeline, severely affecting the service life and operational safety of the cables.
Pipeline corrosion is mainly divided into two major categories: internal corrosion and external corrosion.
Internal corrosion varies depending on the nature of the fluid flowing inside the pipeline. This includes acidic corrosion, corrosion caused by chloride ions, microbial corrosion, stress corrosion, welding corrosion, and so on.
External corrosion is mainly caused by the corrosion of the pipeline material at the interface with external environments such as soil, seawater, and the atmosphere. Additionally, some pipelines have insulation layers on the outside, which may cause moisture to accumulate under the insulation layer due to other factors (sometimes even heating external moisture due to the high temperature of the internal medium), creating highly corrosive areas that lead to corrosion beneath the insulation layer.
Glass fiber reinforced winding pipes are extruded and formed under high temperature and high pressure, resulting in high product density and excellent water resistance. They use unsaturated polyester resin and high-performance fiber composite materials, which have better acid and alkali resistance than traditional pipe materials. Therefore, glass fiber reinforced winding pipes are an ideal choice for underground power cable laying projects.
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