Ultra high molecular weight polyethylene pipe is a thermoplastic engineering plastic with an average molecular weight of more than 2 million, which is polymerized by ethylene and butadiene monomers under the action of catalyst. It has impact resistance, low temperature resistance, wear resistance, chemical corrosion resistance, self lubrication and impact absorption energy. What are the advantages of UHMWPE pipe compared with PE pipe?

1. Super compressive strength and pressure bearing capacity

The compressive strength of UHMWPE pipe is 2.5 times that of PE80, 2 times that of pel00, 5 times that of PE100, and more than 30 times that of PE100.

2. High impact resistance and flexibility

The impact resistance and absorption performance of UHMWPE pipes are the first in plastics. It is difficult for them to crack under strong external impact or internal pressure fluctuation. Its impact strength is 10 times of nylon 66, 20 times of U-PVC and 5 times of PE. In the low temperature environment, the impact resistance is more excellent and has strong flexibility.

3. High wear resistance

The friction coefficient of UHMWPE pipe is only 0.07-0.2, and its molecular chain is very long, which makes the wear resistance of pipe material 4-7 times higher than that of steel pipe and metal pipe, 10 times higher than that of PE100, and about 10 times higher than that of U-PVC.

Among many pipe materials, the wear index is the smallest. The wear resistance is 4-7 times higher than that of steel pipe and stainless steel pipe, and more than 10 times higher than that of PVC pipe and polyethylene pipe, which greatly improves the service life of the pipe.

4. Corrosion resistance

UHMWPE pipe is a kind of saturated molecular group structure, so its chemical stability is very high. It can resist the corrosion of various corrosive media (acid, alkali, salt) and organic solvents in a certain range of temperature and concentration.

High stability of molecular structure; no electrochemical corrosion; resistant to a variety of chemical media.

5. Liquidity

UHMWPE pipe has self lubrication and non adhesion, and its friction coefficient is small. The inner wall of the pipeline produced by the special process is resistant to corrosion, friction and scaling, so the flow resistance is very small, and the flow rate and flow rate can be maintained for a long time. Therefore, the inner diameter of the steel tube can be reduced by 15% - 20%.

① Medium flow rate reaches 2.3 m / s without scaling

② Greatly reduce the cleaning cost and avoid secondary pollution

③ The roughness is 1 / 6 of that of steel pipe, the flow resistance is small, and the design of inner diameter can be 15.4% less than that of steel pipe.

6. Weatherability and aging resistance

Ultra high molecular weight polyethylene pipe has good weatherability and anti-aging properties. Because it is a kind of saturated molecular group structure, and the addition of carbon black ultraviolet absorbers greatly enhances the service life of ultra-high pipes.

7. Non toxic and tasteless, highly environmentally friendly.

Polyethylene material is a national certified environmental protection material, no toxicity, any anti pollution and anti moth. Because the surface is smooth, it will not be eaten by shellfish, bacteria and other microorganisms in the sea or sewage, will not produce scale and microbial growth, will not increase the roughness, and ensure the stability of water quality.

8. Good electrical insulation.

UHMWPE pipeline is a non-conductor with excellent electrical insulation. Its insulation resistance is 1012-1015m Ω (1016-1018), which is most suitable for dense areas of power transmission and telecommunication lines and multi thunder areas. The heat transfer coefficient of UHMWPE pipeline is very small, only 0.13, which is 2 ‰ of steel. The thermal insulation performance of pipeline is excellent.

9. No leakage of pipe network.

Leakage of water supply and drainage pipe network has always been a difficult problem for urban water supply and drainage in China. In 1999, the average leakage rate of urban water supply enterprises in China was 15.14%, the leakage per unit pipe length was 3.41m3/km/h, and the leakage of pipe network was quite serious. The root of the problem lies in the leakage of the selected pipe and the leakage of the pipe joint, especially the leakage of the joint, which causes the foundation to sink and the pipe joint to crack. UHMWPE pipeline completely solves the problem of pipeline leakage. The electric melting connection makes the pipe network free of leakage points.

10. Low construction cost.

① The construction working face is smaller than the prestressed steel concrete pipe, cast iron pipe and glass steel pipe of the same caliber. The working face is two-thirds less, which can reduce the compensation for land occupation by 70%. Taking the 800mm inner diameter pipe as an example, the working face of prestressed steel reinforced concrete pipe, cast iron pipe and FRP is required to be 25m wide, and the working face of UHMWPE pipe is required to be 8m wide. The compensation for land occupation has been reduced.

② The laying of UHMWPE pipeline does not need 3:7 lime soil foundation and sand filling. It is only necessary to connect the pipeline along the ditch edge and push it into the fill for compaction. While the laying of prestressed steel reinforced concrete pipe, cast iron pipe and glass steel pipe requires 3:7 lime soil foundation or brick concrete foundation, which needs sand filling. Therefore, the construction cost is only one fifth of that of other pipes

③ Compared with steel pipes and cast iron pipes, UHMWPE pipes do not need anti rust and anti-corrosion treatment, and buried pipes do not need cathodic protection, which can save more than 70% of the project cost.

11. Low maintenance costs.

Due to the anti-corrosion, wear-resistant, anti freezing and anti pollution properties of UHMWPE pipes, there is no leakage, so after decades of operation, the pipeline does not need to carry out anti rust, anti pollution, insulation, insulation and other measures and maintenance, which can save more than 95% of the operation and maintenance costs.

12. The long-term comprehensive benefit is good and the use cost is low.

Comprehensive benefits refer to the long-term benefits formed by construction investment, installation cost, operation and maintenance cost, service life, energy saving and other factors. The comprehensive benefit of UHMWPE pipeline is desirable. Especially, the larger the pipe diameter, the lower the cost. The buried pipeline can be used for more than 150 years without annual maintenance, and it can give full play to its superior comprehensive benefits.

13. Other features

It is difficult to break UHMWPE pipe material after forming