The coating at the interface has very strict technical requirements. Under the pressure of. 0 MPa, it will not leak, and the function of anti-leakage is firmly ensured. Plastic-coated pipe is used for cable threading and plastic-lined steel pipe is composed of two layers. Even if the bonding force of polyethylene lining pipe is far less than that of plastic-coated pipe, the plastic-coated pipe for cable threading will simply occur stratification under the condition of thermal expansion and cold contraction. The connection between plastic pipe and steel pipe will corrode the steel pipe, which constitutes the whole pipeline anti-failure and greatly reduces the service life. Due to the different processing methods and materials used for plastic coated pipe and plastic lined pipe, the difference of service life and price is formed. The function target of plastic coated pipe is far better than that of plastic lined pipe. Because of the high price of the coatings used in the plastic pipe. The processing method is messy and the cost is high, so it is slightly higher than the market price of plastic-lined steel pipe. The quality of plastic-coated pipe is better, the failure rate is lower, and the service life is longer than that of plastic-lined pipe.
In order to increase welded steel pipe or seamless pressure steel pipe composite structure, the exterior and interior plastic pipe manufacturer chooses the exterior and interior plastic coating maintenance layer, overcomes the shortcomings of the steel pipe itself, such as easy rusting, high pollution, low degree of plastic pipe and easy deformation, integrates the same advantages of steel pipe and plastics, and attributes to the environmental protection of implementation and application. Plastic coating pipe is now widely used in municipal construction, real estate profession, fire fighting body. It can be used in water supply, drainage, cable laying, oil and gas transportation and discharge of key construction projects such as communication, power, petroleum, chemical industry, gas, coal mine and highway, and can also be used in daily transportation pipelines of desulfurization system, boiler system and seawater circulation system in thermal power plants. With seamless steel pipe and welded steel pipe as the base pipe, the inner wall is coated with high adhesion, anti-corrosion, food-grade sanitary polyethylene powder coating or epoxy resin coating. The exterior coated plastic pipe manufacturer is a new type developed independently by introducing foreign technology and skills. It is the first domestic modified epoxy powder to coat the inner and outer walls of steel pipes. The coatings have excellent heat resistance. They can be used for a long time at the bar temperature of 0-00 C without burning or softening.
Fire water (gas) coating pipe is steel-plastic combination, with the advantages of steel pipe and plastic pipe, its degree is high, just, high pressure; because of the inner wall plastic coating, so the surface and inner surface is smooth, fluid resistance is small, flow rate is large. Fire-fighting water (gas) coating pipeline has chemical resistance, water resistance and solubility resistance, protein, high multiple foam activator, which can deal with metal pipelines due to water transportation, burial and acid, alkali and salt, thus greatly advancing the service life of pipelines. Drainage plastic-coated pipe is a new type of composite pipe developed for water supply and drainage. It summarizes the characteristics of various pipes, including steel and hardness of pipes, wear resistance, resistance and small coefficient of plastic pipes. It is a green energy-saving pipe with a very high price ratio. It is widely used in industrial water supply and drainage, daily water supply and drainage, seawater treatment, HVAC circulating water and chemical fluid transportation. It is called "high quality green building materials". There are three common methods for the connection of plastic-coated pipes, which are threaded connection, flange connection and groove connection.