How to Reasonably Prevent Pipeline Corrosion with Foam Insulated Steel Pipes? In the transportation of urban natural gas pipelines, only the transportation through directly buried foam insulated steel pipes can enter residential homes. However, the electrolysis of the underground soil layer is in a state of weightlessness and pH value, along with the content of chloride ions, scattered electron devices, humidity, and moving friction. All of these are corrosive to the underground transmission pipelines. The corrosion depth of the underground Cl-ion concentration on the raw materials is the average corrosion efficiency of the underground raw materials, and the extension rate of partial corrosion. Data shows that with the increase of Cl-ion concentration in the soil, the increase in corrosion depth, the promotion effect of Cl-ion concentration on the extension speed of partial corrosion is significantly higher than the average corrosion depth. Polyurethane spraying and winding insulated pipes.
The 3PE anti-corrosion processing technology was introduced from overseas in the mid-to-late 1990s, a professional anti-corrosion technique with the full name of Fusion Bond Epoxy Resin/Fire Retardant Plastic High-Density Polyethylene Structural Coating. This 3PE anti-corrosion technology combines the superior qualities of epoxy coating and extruded high-density polyethylene, integrating the flatness and solvent resistance of the epoxy coating with the mechanical maintenance characteristics of extruded polyolefin anti-corrosion coatings, significantly enhancing various properties. Its features include high tensile strength, wear resistance, corrosion resistance, high-temperature resistance, cold resistance, and can be used in materials up to 150 degrees Celsius, melting in cold areas. Due to the excellent properties of the PE anti-corrosion layer, polyurethane spray-wound insulation pipes are utilized.
Foamed insulation steel pipes share similarities with 3PE reinforced anti-corrosion steel pipes and standard 3PE anti-corrosion steel pipes, both featuring a three-layer structure. These layers consist of a representative epoxy coating layer, a bonding layer, and a third layer of high-pressure polyethylene. The three materials are fused together, providing a strong bond with seamless pipes and forming an excellent anti-corrosion layer. Typically, the coating thickness of 3PE anti-corrosion steel pipes ranges from 2.0 to 2.2 millimeters, but the coating thickness of 3PE reinforced anti-corrosion steel pipes is between 2.7 to 2.9 millimeters, indicating a significantly enhanced corrosion resistance and longer service life. Generally, 3PE reinforced anti-corrosion steel pipe products.
