1.Chlorinated polyvinyl chloride plastic pipe (CPVC)
Advantages:
High heat resistance: CPVC pipes increase the chlorine content through certain processes on the basis of PVC resin, thereby enhancing the material's heat resistance.
Corrosion resistance: It enhances the material's resistance to acids, alkalis, salts, oxidants, etc.
Applicable to high-voltage cables: Due to the improvement of its heat resistance and mechanical properties, CPVC pipes are more suitable for high-voltage cable conduits.
Disadvantage:
Higher cost: CPVC increases the chlorine content of PVC resin through chemical methods, so its cost is higher than that of UPVC.
2. Modified polypropylene solid-wall pipe (MPP)
Advantages:
Excellent electrical insulation: MPP power pipes have excellent electrical insulation, ensuring the safety of installers.
High tensile and compressive strength: The tensile and compressive strength of MPP power pipes is higher than that of CPVC.
High-temperature resistance: The long-term operating temperature range of MPP pipes is -5 to 70℃, featuring high-temperature resistance.
Easy to install: The pipe is light in weight, smooth, has low frictional resistance, and can be welded by heat fusion, making the installation convenient.
Disadvantage:
Relatively high cost: Although MPP pipes have many advantages, their cost may be higher than that of some other materials.
3. High-density Polyethylene pipe (HDPE)
Advantages:
Lower cost: HDPE pipes have a lower cost than MPP pipes.
Easy to connect: The hot-melt connection method is the same as that of MPP pipes, making construction convenient.
Disadvantage:
Poor heat resistance: The strength of HDPE pipes drops significantly when the temperature exceeds 40℃, and decreases by two-thirds at 70℃. They soften and deform under the influence of external forces.
4. Hot-dip plastic-coated steel pipe
Advantages:
Anti-corrosion: Coated with a nano-scale plastic anti-corrosion layer, it has excellent anti-corrosion performance.
Disadvantage:
Not suitable for single-core cables: Due to the generation of eddy currents, the steel pipe will heat up, affecting the cable's current-carrying capacity. In severe cases, it may even cause a fire.
5. Fiber cement pipe
Advantages:
High strength: It features high strength, is resistant to acid and alkali corrosion, and can withstand high temperatures (not deteriorating above 1500℃).
Good heat dissipation: The thermal cathode coefficient is less than 1.0, it has a large current-carrying capacity, is non-magnetic, and single-core cables do not generate eddy currents.
Disadvantage:
Heavier: Compared with plastic pipes, fiber cement pipes are heavier and may require more manpower during construction.
In conclusion, different types of power cable protection conduits each have their own advantages and disadvantages. When making a choice, a comprehensive consideration should be given to specific engineering requirements, environmental conditions, and budget factors.
