In recent years, with the continuous emergence of new types of pipes, plastic-coated pipes have been utilized for gas transmission. Plastic-coated pipes are specialized gas transmission pipelines capable of conveying various gases such as natural gas and biogas, making them multifunctional.
Plastic-coated steel pipes have a wide range of applications. All steel pipes with their inner and outer layers treated with chemicals fall under the category of plastic-coated steel pipes. Commonly used plastic-coating chemicals for the outer layer of steel pipes include polyethylene, epoxy resin, and other coatings. The service life of plastic-coated steel pipes is longer than that of previous pipe bodies, typically lasting up to 50 years. However, after plastic coating, the properties of the original pipe body change, so caution must be exercised during installation.
Features of plastic-coated steel pipes: They possess anti-corrosion and anti-rust properties. The inner wall of the epoxy resin-coated spiral steel pipe is extremely smooth, with minimal friction resistance, making it suitable for natural gas pipelines or drinking water pipelines. Additionally, the outer wall of the pipeline can be painted with vivid colors, enhancing its aesthetic appeal.
Compared to traditional piping materials that are prone to brittleness and rust, plastic-coated steel pipes offer a service life of over 50 years with a relatively low overall cost. They are more cost-effective than copper and galvanized pipes. As a result, they are not only used for domestic water supply pipes but also as municipal pipelines in cities. For instance, plastic-coated steel pipes serve as natural gas and oil pipelines, inheriting the hardness of traditional steel pipes while being lighter, experiencing less resistance, and allowing for faster fluid flow within the pipes.
Product Features: Mining plastic-coated pipes (hereinafter referred to as film-coated plastic steel pipes) are steel-plastic composite pipes with anti-static and flame-retardant properties. They are manufactured by applying a special polyethylene material to the inner and outer surfaces of ordinary steel pipes through a specific process.
(1) This product utilizes polyethylene coating, with its anti-static and flame-retardant components evenly distributed on the surface and inner layer of the pipe, meeting the requirements of mt181 and suitable for use in flammable and explosive environments in mines.
(2) Strong adhesion: After coating, bonding, and curing, the inner and outer surfaces of plastic-coated steel pipes exhibit an adhesion force of ≥30N/10mm, remaining undamaged after impact and tearing tests with a drop hammer.
(3) Corrosion resistance, low fouling tendency, and low fluid resistance: The pipes are highly resistant to acids and alkalis, making them suitable for mine water with high sulfur content and water containing calcium and magnesium ions. Due to their high surface smoothness, low fluid resistance, and resistance to fouling, they can reduce secondary pollution.
(4) High pressure bearing capacity: Polyethylene powder provides excellent plastic coating toughness, combined with the high mechanical strength of steel pipes, resulting in strong resistance to external impacts such as shocks and bending.
Primary Uses and Scope of Application: Plastic-coated steel pipes are versatile pipes used underground in coal mines for water supply and drainage, positive pressure ventilation, negative pressure ventilation, coal slurry spraying, gas drainage, etc. The operating pressure should not exceed the nominal pressure.
