How to anti-corrosion the expansion joint products of sewage plant

How to carry out anti-corrosion to the expansion joint products of sewage plant? How to ensure the safe and effective operation of the pipeline?

Sewage plant expansion joints are generally manufactured by Q235A, and high-quality anti-corrosion treatment is used in the manufacturing process, which can effectively prevent various corrosion phenomena of sewage plant expansion joints, extend the service life of sewage plant expansion joint products, and reduce pipeline maintenance costs. , To ensure the safe and effective operation of the pipeline. Anti-corrosion coating of expansion joints in sewage plants: a film applied to the inner wall of the pipe in order to prevent corrosion in the pipe, reduce frictional resistance, and increase throughput Commonly used coatings are amine cured epoxy resin and polyamide epoxy resin, the coating thickness is 0.038 ~ 0.2 mm. In order to ensure the coating adheres firmly to the pipe wall, the inner wall of the pipe must be surface treated. Since the 1970s, it has tended to use the same material for the inner and outer wall coatings so that the inner and outer wall coatings can be applied simultaneously. Anti-corrosion and heat-insulation coating: On the medium- and heat-transporting crude oil or fuel oil pipelines, in order to reduce the heat radiation from the pipeline to the soil, a composite layer of thermal insulation and anti-corrosion is added outside the pipeline. The commonly used insulation material is rigid polyurethane foam, and the applicable temperature is -185 ~ 95. This material has a soft texture. To increase its strength, a layer of high-density polyethylene is added to the outside of the insulation layer to form a composite structure to prevent groundwater from seeping into the insulation layer.
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