The steel mesh skeleton polyethylene composite pipe has the common characteristics of plastic pipe, such as corrosion prevention, no scaling, smooth low resistance, heat preservation, no wax deposition, wear resistance, light weight, etc., and its unique structure also creates the following characteristics: because the plastic will creep under normal temperature and stress, and brittle fracture will occur under high lasting stress.
Therefore, the allowable stress and pressure 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 the strength of plastic pipes used in plastics 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. Since about 2/3 of the strength of the steel mesh skeleton polyethylene composite pipe is borne by the steel mesh skeleton, its strength decreases less with the increase of service temperature than that of any pure plastic pipe.
The experimental results show that the strength of the steel mesh skeleton polyethylene composite pipe decreases below 5% when the temperature is increased by 10 ℃. The elastic modulus of steel is usually about 200 times that of high-density polyethylene. The rigidity, impact resistance and dimensional stability of the steel mesh skeleton polyethylene composite pipe are superior to any pure plastic pipe due to the reinforcement of the steel mesh skeleton. 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.
