HDPE water pipe and PVC water pipe are two common plastic water pipes. They have certain differences in material, performance and application fields. The choice of which water pipe depends on the specific usage scenario and needs. This article mainly introduces HDPE vs pvc water pipe.
The advantages of HDPE water pipe mainly include:
1. Low temperature resistance: The brittle temperature of HDPE water pipe is -70℃. No special protection measures are required when constructing under low temperature conditions, which is suitable for winter construction.
2. Good sealing: It can effectively prevent liquid or gas leakage.
3. Anti-aging: It can be used for a long time in outdoor environment without being easily affected by ultraviolet rays, oxidation and other factors.
4. Good chemical stability: Since HDPE molecules have no polarity, they have excellent resistance to most chemical media.
5. Excellent wear resistance: The wear resistance of HDPE is even several times higher than that of steel pipes, which is suitable for occasions requiring wear resistance.
6. Lightweight: Light weight, easy to carry and install, and fast construction speed.
The advantages of PVC water pipes mainly include:
1. Corrosion resistance: It has good chemical corrosion resistance and can resist erosion by a variety of media.
2. Good flame retardancy: It has a high flame retardancy rating, is not flammable, and can effectively prevent the spread of fire.
3. Electrical insulation: It has good insulation performance and is suitable for occasions requiring electrical insulation.
4. Lower cost: Compared with HDPE water pipes, PVC water pipes are usually cheaper.
Material and characteristics:
HDPE water pipes are made of high-density polyethylene (HDPE), which has good low-temperature resistance and can be used in the range of -70℃ to 40℃, with excellent low-temperature resistance. HDPE water pipes also have high strength and hardness, smooth inner wall, low friction coefficient, low fluid resistance, no scaling, can reduce pipeline pressure loss and water delivery energy consumption, and have obvious economic advantages.
PVC water pipes are made of polyvinyl chloride (PVC), which has non-flammability, high strength, climate change resistance and excellent geometric stability. PVC water pipes have strong resistance to oxidants, reducing agents and strong acids, but are easily corroded by concentrated oxidizing acids, so they cannot come into contact with concentrated sulfuric acid, concentrated nitric acid, aromatic hydrocarbons, chlorinated hydrocarbons, etc.
Applications:
Due to its excellent properties, HDPE water pipes are commonly used in water supply, gas pressure and other occasions. PVC water pipes are more suitable for home decoration wire protection due to their good insulation and flame retardancy, especially in narrow space wiring such as ceilings.
Connection method:
HDPE water pipes and accessories are universal and can be prefabricated and installed, while PVC water pipes usually use TS (gluing) interfaces. The adhesives used may contain substances that are harmful to the human body and may affect the taste and quality of water.
Processing difficulty:
HDPE water pipes are odorless and non-toxic, and feel like wax. The melting temperature during processing is an important process parameter. If the melting temperature of PVC water pipes is improper during processing, the material will decompose, its flow characteristics are poor, and the process range is narrow, especially high molecular weight PVC materials are more difficult to process.
Price:
The price of HDPE water pipe is relatively high, mainly because of its excellent performance and high production cost. The price of PVC water pipe is relatively low, which is one of the reasons why it is still widely used.
HDPE vs PVC water pipe each has its advantages and disadvantages. The choice of which water pipe depends on the specific usage scenario and needs. For example, for occasions that require wear resistance and low temperature resistance, HDPE water pipe is a better choice; while for cost-sensitive occasions or those that require wire protection, PVC water pipe may be more suitable.
