Internally and externally coated spiral steel pipes are a new type of pipeline material developed after years of research and testing. These pipes are based on spiral steel pipes, with modified epoxy resin powder applied to their inner and outer walls. The coated layer has a strong bond with steel, excellent corrosion resistance, and functions such as reducing friction, corrosion prevention, pressure resistance, and antibacterial properties. They offer good chemical stability and water resistance. Generally, they are not restricted by the transported medium and do not have concerns about leaks, drips, or cracks. They are widely used in fluid transportation for construction water supply, fire protection, oil, gas, chemicals, sewage, mining, and agricultural irrigation, replacing traditional materials like cast iron pipes and steel pipes that are energy-intensive, prone to rust, scaling, have short lifespans, and are heavy to transport. Technical parameters of internally and externally coated composite steel pipes: Coating Material: Epoxy resin Common Color: White Coating Thickness: 200um—500um Coating Method: Internal and external spraying or external galvanized internal spraying Product Specifications: DN15—DN1200 Environmental Temperature: -30℃ to 80℃ Standard Pressure: 0.1Mpa—2.5Mpa (Note:钢管's material, wall thickness, dimensions, and pressure-bearing capacity can also be customized according to customer requirements) Connection Methods: Threaded, socket, spigot, grooved, flanged connections, etc. Application Fields: Municipal, water supply and drainage, sewage, chemicals, thermal power, reclaimed water transportation pipelines, etc. Product Features of internally coated steel pipes with epoxy resin: These composite pipes use thermosetting fused epoxy resin powder to coat the steel pipe surface, resulting in a smooth and aesthetically pleasing appearance. The coating itself has strong corrosion and water resistance. The smooth inner wall prevents microbial growth during use, reducing the resistance of the transported fluid.
Coating Spiral Steel Pipe (Epoxy Coating Spiral Pipe, Polyethylene Coating Spiral Pipe, etc.) effectively prevents the damage caused by plant roots and soil environmental stress from long-term underground installation. After surface frost-proof treatment, it can be used in an environment as low as -30°C. Its service life is 1 to 2 times longer than that of similar products. Steel-plastic composite pipe (Epoxy Coating Spiral Pipe, Polyethylene Coating Spiral Pipe, etc.) - News on the application of coated steel pipe with internal and external epoxy coating follows the Ministry of Construction's notice, which bans the use of galvanized steel pipes as water supply pipes and promotes the application of new plastic pipe materials. There are many types of plastic water supply pipes on the market. Over the years, plastic pipes have exposed some problems and shortcomings. Due to the high linear expansion coefficient of plastic pipes, some soft plastic pipes are not suitable for indoor exposed installation, as they can deform due to thermal expansion and contraction, affecting aesthetics. Their temperature and pressure resistance gradually decreases with the rise in the temperature of the transmitted medium and the increase in service life. Plastic water supply pipes are not suitable for outdoor exposed installation, as they are easily affected by sunlight and ultraviolet radiation, accelerating aging. Some large-diameter plastic pipes are neither suitable nor economical due to the difficulty in material consumption and connection quality control. Steel-plastic composite pipes have outstanding advantages in the field of water supply.
