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The internal and external liquid epoxy anti-corrosion steel pipes adopt a steel plastic composite structure, with thermosetting epoxy resin coating on the inner wall and polyethylene (PE) or three-layer polyethylene (3PE) anti-corrosion coating on the outer wall. The production process includes surface pretreatment of steel pipes, electrostatic spraying of epoxy powder, high-temperature fusion curing, and other steps, with the coating tightly bonded to the substrate. The inner wall epoxy resin coating has food grade safety standards, and the outer wall 3PE structure is formed by stacking a bottom layer of epoxy powder, an intermediate adhesive, and an outer layer of polyethylene to form a composite protective system with high impact resistance and corrosion resistance.
keyword Internal and external liquid epoxy anti-corrosion steel pipes Category Anti-coating pipe name Related products Get a quoteInternal and external liquid epoxy anti-corrosion steel pipes
Product Structure and Process Characteristics
The internal and external liquid epoxy anti-corrosion steel pipes adopt a steel plastic composite structure, with thermosetting epoxy resin coating on the inner wall and polyethylene (PE) or three-layer polyethylene (3PE) anti-corrosion coating on the outer wall. The production process includes surface pretreatment of steel pipes, electrostatic spraying of epoxy powder, high-temperature fusion curing, and other steps, with the coating tightly bonded to the substrate. The inner wall epoxy resin coating has food grade safety standards, and the outer wall 3PE structure is formed by stacking a bottom layer of epoxy powder, an intermediate adhesive, and an outer layer of polyethylene to form a composite protective system with high impact resistance and corrosion resistance.
Performance advantages and core functions
This product excels in corrosion resistance, high temperature resistance, and mechanical strength. Epoxy resin coating can resist acid, alkali, salt and microbial erosion, with a suitable temperature range of -40 ℃ to 120 ℃, and a low friction coefficient, reducing fluid resistance. The outer wall 3PE anti-corrosion layer has the ability to resist soil stress, cathodic stripping, and permeability, extending the pipeline time by 3-5 times. In addition, its solvent-free coating process is environmentally friendly and energy-saving, meeting the requirements of green engineering.
Application Fields and Engineering Cases
This type of steel pipe is widely used in petroleum, natural gas, chemical, urban water supply and drainage, and fire protection systems. For example, in long-distance water transmission projects, the food grade coating on the inner wall ensures water quality safety; In oil pipelines, 3PE external anti-corrosion coating effectively deals with soil and chemical medium corrosion. In marine engineering, this structure is used for subsea pipelines to resist seawater erosion, while the fire water supply system utilizes its high pressure resistance and flame retardant properties to enhance safety.
Market Development and Technological Trends
With the tightening of environmental policies, the demand for liquid epoxy anti-corrosion steel pipes continues to grow. The direction of technological upgrading includes optimizing the scratch resistance of double-layer FBE coatings, improving the high-temperature permeability of composite coating materials, and improving production efficiency through intelligent spraying processes. In the future, its anti-corrosion performance and structural adaptability will further expand its application scenarios in emerging fields such as hydrogen energy transportation and deep-sea pipelines.
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