hardware cloth skeleton polyethylene Composite pipe With high strength steel wire The left and right spiral wound reticular framework is used as reinforcement, and high-density polyethylene (HDPE) is used as matrix, and high-performance bonding is used resin The layer closely connects the steel mesh skeleton with the inner and outer high-density polyethylene. This adhesive resin is a high-performance adhesive material, which belongs to HDPE modified material. It can be completely fused with HDPE under heating conditions. At the same time, its polar bond has extremely strong bonding performance with steel. Due to the use of adhesive resin, the problem of no connection factor between steel and HDPE has been successfully solved, with better composite effect.
      Plastic polyethylene composite pipe with steel mesh framework is our company's combination of the characteristics of domestic steel mesh polyethylene composite pipe products, and learn from foreign Pipe An improved product developed by combining technologies. Due to the use of high-quality materials and advanced production technology, it has higher pressure resistance.
At the same time, the composite pipe has excellent flexibility, and is more suitable for long-distance buried water supply, gas transmission pipeline systems and mining Air duct Pipes for gas drainage and shotcreting.
 
Application field:
Municipal works: urban building water supply, drinking water, and water consumption waterproof , heat supply network return water, gas natural gas Transportation, highway buried drainage and other channels.
Oilfields and gas fields: oily sewage, gas field sewage, oil and gas mixture, secondary and tertiary oil recovery and gathering and transmission process pipes.
Chemical industry: acid, alkali and salt manufacturing industry, process pipes and discharge pipes for transporting corrosive gases, liquids and solid powders in petroleum, chemical industry, fertilizer, pharmacy, textile, printing and dyeing, rubber and plastic industries.
Power engineering: transmission pipelines for process water, return water, water supply, fire water, dust removal, waste residue, etc.
Metallurgical mine: for Non ferrous metals Corrosive medium conveying and slurry, tailings, ventilation pipes and process pipes in smelting.
Seawater transportation: seawater transportation in desalination plants, seaside power plants, and seaport cities.
Shipbuilding: sewage pipe, drainage pipe, ballast water pipe, ventilation pipe, etc.
Agricultural sprinkling irrigation: deep well pipes, filter pipes, underground channel pipes, drainage pipes, irrigation pipes, etc.
Product * * Features:
Steel mesh skeleton plastic (polyethylene) composite pipe has anti-corrosion and no scaling The common characteristics of plastic pipes, such as smooth, low resistance, heat preservation without wax, wear resistance, light weight, etc., and their unique structure also create the following characteristics:
(1) Good creep resistance and high durable mechanical strength
As plastic will creep under normal temperature and stress, and brittle fracture will occur under high persistent stress, the allowable stress and bearing capacity of pure plastic pipes are very low (generally within 1.0Mpa). The mechanical strength of steel is about 10 times that of thermoplastics, and it is very stable without creep within the temperature range of plastics. After the mesh steel wire skeleton is compounded with the plastic, the steel wire mesh skeleton can effectively restrain the creep of the plastic and greatly improve the durable strength of the plastic itself. Therefore, the allowable stress of the steel mesh skeleton plastic composite pipe is twice that of the plastic pipe.
(2) Good temperature resistance
The strength of plastic pipe generally decreases with the increase of temperature within its use temperature range, and the strength decreases by more than 10% for every 10 ℃ increase in temperature. Due to the strength of steel mesh skeleton plastic composite pipe is about 2/3 is borne by the steel wire mesh skeleton, so its strength decreases less with the increase of service temperature than any pure plastic pipe. The experimental results show that the strength of plastic composite pipe with steel mesh framework decreases below 5% when the temperature is increased by 10 ℃.
(3) Rigidity, good impact resistance, good dimensional stability, moderate flexibility, and combination of rigidity and flexibility
    The elastic modulus of steel is usually about 200 times that of high-density polyethylene. The rigidity, impact resistance and dimensional stability of plastic composite pipe with steel mesh framework are superior to any pure plastic pipe due to the reinforcement of steel mesh framework. At the same time, because the reticulated steel framework itself is a flexible structure, the composite pipe also has certain flexibility in the axial direction. Therefore, the pipe has the characteristics of rigid and flexible combination, and has excellent adaptability in loading and unloading, transportation, installation and operation reliability. Installation on the ground can save the number of bearings, and the cost is low; Underground installation can effectively bear the sudden impact load caused by settlement, sliding, vehicles, etc. Small diameter pipes can be properly bent and arranged according to terrain fluctuation or serpentine layout to save pipe fittings.
     
(4) Small thermal expansion coefficient
   Since the linear expansion coefficient of steel wire for plastic pipe is 10.6~12.2 × 10-6 (1/℃), and that of pure plastic pipe is 170 × 10-6 (1/℃), the thermal expansion of composite pipe with steel mesh framework is greatly improved under the constraint of mesh steel framework, which is lower than any commonly used plastic pipe, The expansion coefficient of steel skeleton plastic composite pipeline is 35.4~35.9 × 10-6 (1/℃), which is only 3~3.4 times that of ordinary carbon steel pipe. The experimental results show that the thermal compensation device is generally not required for buried installation, and the pipeline can be absorbed (or released) by meandering laying, thus reducing the installation cost.   
(5) No rapid cracking
    Pure plastic pipes, especially large-diameter pure plastic pipes, are prone to rapid cracking caused by local defects and stress concentration under the effect of persistent circumferential stress at low temperature (hundreds of meters to kilometers in an instant). Therefore, at present, the international community has put forward high requirements on the rapid cracking resistance of pipe plastics, while low-carbon steel does not have brittle fracture problems, The plastic deformation and stress will not reach the critical point of rapid cracking due to the existence of steel mesh. Therefore, in theory, there is no rapid cracking in the plastic composite pipe of steel wire grid.
6) The composite of steel and plastic materials is uniform and reliable
     At present, the steel plastic composite pipe on the market is easy to delaminate under the action of alternating stress due to the continuous and regular interface between steel and plastic, which leads to leakage at the connection, bottleneck shrinkage and blockage in the interior and failure. Compared with the steel wire mesh framework plastic composite pipe, the steel wire mesh framework plastic composite pipe is a mesh structure, and the plastic and steel wire mesh are closely combined and integrated through special hot melt adhesive (modified HDPE). The two materials have large and uniform binding force and small stress concentration.
7) Double sided anti-corrosion
    The steel wire mesh framework is compounded in the plastic through * * hot melt adhesive layer. The inner and outer surfaces of the pipes have the same anti-corrosion performance, wear resistance, smooth inner wall, small transmission resistance, no scaling, no wax, obvious energy-saving effect, and more economical and convenient for underground transportation and corrosive environmental conditions.
  
(8) Good self tracing
    Due to the existence of the steel mesh skeleton, the plastic composite pipe with steel mesh skeleton buried underground can be located by the usual magnetic detection method to avoid damage caused by other excavation projects. This kind of damage is caused by pure plastic pipes and other non-metallic pipes.
(9) Convenient and flexible adjustment of product structure and performance
    The structure and performance of the product can be adjusted by changing the steel wire diameter, mesh spacing, plastic layer thickness, plastics and types to meet different pressure, temperature and corrosion resistance requirements.
(10) * * Electric fusion joints, with various varieties, are very fast and reliable in installation
    The steel skeleton plastic composite pipe is connected by electrothermal fusion connection and flange connection. Electrothermal melting connection is to insert the composite pipe into the electrothermal melting pipe fitting, and energize the electric wire embedded on the inner surface of the pipe fitting to heat it 。 First, melt the inner surface of the pipe fittings to produce melt, and the melt expands and fills the gap between the pipe fittings until the outer surface of the pipe also produces melt. The two melts are fused together. After cooling and molding, the pipe and the pipe fittings are closely connected as a whole.