3PE anti-corrosion steel pipe refers to a heat preservation and anti-corrosion method that guarantees that the internal temperature of the steel pipe and the surface temperature together in a different working environment to reduce or prevent corrosion and deterioration due to the chemical and electrochemical action of the external medium or metabolic activities of microorganisms. The anti-corrosion method is generally to coat the surface of the metal pipe through the rust with fine coating, so that it is blocked from various corrosive media, which is also one of the closest cost methods in steel pipe anti-corrosion. The anti-corrosion coating on the inner wall is a layer of film to prevent corrosion in the pipe and reduce the forward transport of friction resistance; The anti-corrosion and heat-insulation coating is to reduce the heat dissipation from the pipeline to the soil, and a composite layer of thermal insulation and anti-corrosion is added to the outside of the medium and small-diameter heat-transporting crude oil or fuel pipeline. If the outer protective tube is a polyethylene tube, there is no need to do anti-corrosion work. Because polyethylene has excellent low temperature resistance, good chemical stability; it is often corroded by most adds and alkalis, it is insoluble in common solvents at room temperature, and has low water absorption.
Three-layer polyethylene anticorrosion is one of the primary technical systems for external anticorrosion of buried pipelines at home and abroad. It has good anti-corrosion function, low water absorption rate, and advanced mechanical strength. It has been widely used in domestic buried water gas and oil pipelines in recent years.
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Post time: Apr-16-2020