The steel-plastic composite pipe is produced by a 5-layer one-step process. The four layers of plastic are all extruded, and the inner tube is extruded, heated, coated, coated with steel, heated, covered with plastic, and coated with plastic. High process requirements.
Steel-plastic composite pipe, the product is based on seamless steel pipe and welded steel pipe, and the inner wall is coated with high-adhesion, anti-corrosion, food-grade sanitary polyethylene powder coating or epoxy resin coating. The galvanized inner plastic coated composite steel pipe made by pre-treatment, preheating, inner coating, leveling and post-treatment processes is an upgraded product of the traditional galvanized pipe.
Steel-plastic composite pipe is abbreviated as steel-plastic pipe. It is based on steel pipe and coated with plastic material. Therefore, it not only maintains the high strength and toughness of steel pipe, but also has high pressure, impact and crack resistance. Compared with galvanized pipes and cast iron pipes, it is safer, more reliable, economical and environmentally friendly. It can completely replace galvanized pipes and cast iron pipes in the water supply field. The installation method of steel-plastic pipes is similar to that of galvanized pipes, and its operation is simple. In recent years, Steel-plastic pipes have been widely used in developed cities in China. With the continuous transformation of the city's direct drinking tap water projects, steel-plastic pipes will surely gain more market space.
First, the performance characteristics of steel-plastic composite pipe:
1. Corrosion resistance Excellent resistance to various concentrations of acid, alkali, salt corrosion, non-fouling service life is higher than other pipes.
2, the flame retardant performance of the product used in the plastic raw material additives, its flame retardant performance in line with national standards of its steel-plastic composite structure, flame retardant performance is better than other pipes.
3. It has strong adhesion. The inner and outer walls of steel pipe are treated by high-efficiency shot blasting and sand blasting, and the coating adhesion is ≥30N/10mm.
4, superior mechanical properties can withstand the harsh environment of use. Steel-plastic composite pipe coating has good toughness, high mechanical strength of steel pipe, and superior resistance to external impact such as impact bending. The connection is convenient and secure, and the connection can be connected by a quick connector, and the card connection is extremely interchangeable.
Second, steel-plastic composite pipe connection
1, using the quick connector connection features:
(1) Simple and convenient installation and disassembly, and improved work efficiency
(2) Allow 3-8 degrees of axial deflection, strong installation applicability
(3) Effectively reduce mechanical vibration and earthquake resistance
(4) Compensating the expansion and contraction of the pipeline system, eliminating the expansion joint and the U-shaped pipeline
(5) The diameter of the connecting piece is the same as the nominal outer diameter and pressure level of the pipe.
2, can be flanged features:
(1) Easy to connect
(2) Simultaneous coating of inner and outer walls of pipe fittings
(3) good sealing
(4) The pressure level is consistent with the pipe
3, plug-in
Place the cable sleeve into the trench, insert the plug-in pipe joint, and insert a cable sleeve at the other end of the pipe joint until the installation is completed.
4, flared tube connection
Place the flared tube into the trench, and the unexpanded end is aligned with the flared end of the other flared tube and inserted until the flared depth.
5, buckle connection
In the place where the sealing requirements are high, the rubber sealing ring can be fastened to the outside of the pipe to be connected, and then the clamp is engaged with the pre-rolled groove, and then fastened with two bolts.
Third, steel-plastic composite pipe application field
The application field of steel-plastic composite pipe is the hot and cold water pipeline in the urban construction water supply and drainage system. Hot and cold water pipes for water supply and drainage systems of residential and commercial buildings; natural gas, gas and other transportation pipelines; liquid transportation pipelines for petroleum, chemical, food, pharmaceuticals, etc. Agricultural irrigation and drainage pipes; water supply and drainage pipes in industrial papermaking and fire protection systems.
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