1, impact resistance of super executives. Environmental stress resistance, cracking resistance and scratch resistance rank first among all kinds of plastics, among which the impact strength is more than 0/0 times of PE 100 at room temperature and 0/6 times of PE 100 at -30℃. The crack resistance is about twice that of PE 100, and the lower the ambient temperature, the stronger the impact resistance. Its extraordinary flexibility enables it to resist all kinds of external shocks and crustal deformation without composite steel pipes, which is safer and more reliable than steel pipes.
2. The wear resistance of ultra-high grade pipe is 4 ~ 7 times that of steel, 65,438+00 times that of polyethylene and polypropylene, and 2.3 times that of pe. It is best to transport small particle slurry such as fly ash.
3. Ultra-high management pipe is a kind of saturated molecular structure with very stable chemical properties, which can resist the corrosion of various corrosive media and organic solvents, and is more corrosion-resistant than polyethylene, polypropylene, nylon, ABS and other plastics.
4. Ultra-high-grade pipe is non-sticky, and its chemical and physical polarity is lower than that of ordinary plastic. For example, the polarity of polyethylene is 9, while that of super-high-grade polyethylene is only 1. Of course, it is lower than metal materials, so ordinary adhesives have no effect on superelevation. Similarly, scaling substances are difficult to attach. As long as the slurry flow rate reaches 2.3 ~ 4.6 m/s, it is difficult to form scaling. Even if the scale layer accumulates slowly for a long time, it is not firm and easy to remove. Moreover, there is no need to add corrosion inhibitor during pickling, and the surface after pickling is as smooth as before and does not infringe the pipe wall.
5. The theoretical service life of super senior managers can reach hundreds of years, and the aging speed and embrittlement speed of super senior managers are very slow. After being buried for 50 years, its mechanical properties only decreased by about 20%. The aging resistance of ultra-high pipe is better than that of PE 100, that of polyethylene pipe is higher than that of PE 10014, and its ultraviolet resistance is the same as that of PE65438+. Please refer to "53 Inspection Report" for fatigue strength. The fatigue strength is about 100 times higher than PE 100.
6. The friction coefficient of ultra-high grade pipe is only 1/6 of new steel pipe, 1/5 of ordinary polyethylene, 1/20 of rubber and 1/2 of polypropylene. The flow coefficient "c" of superhigh pipeline is 160. The new steel pipe is only 130, and the old steel pipe is reduced to 95. For the harsh working conditions of mortar transportation, the "C" index of steel pipe is only 60 ~ 80. Moreover, it has ultra-high wear resistance, non-adhesion and corrosion resistance, can always keep the pipe wall smooth and flat, and its circulation capacity is generally more than 50% higher than that of steel pipes, so that the transportation system can keep a low-pressure and smooth state for a long time.
7. The tensile yield strength and tensile fracture strength of ultra-high-rise pipes are relatively high, and the thermal deformation temperature is more than ten degrees higher than that of ordinary plastics, while the cold brittle temperature has almost no lower limit, plus the elongation 100%. Therefore, the super-high-rise pipe can bear large pipeline stress in a wide temperature range and absorb the impact load and water pressure fluctuation during shutdown.
8. The welding process of super high-rise management is simple, intuitive and efficient, and the weld strength exceeds that of the pipe body, which provides convenience and guarantee for the installation of long-distance pipelines, especially medium and high-pressure pipelines. Ultra-high-rise buildings do not need anti-corrosion, and the pipes are light and soft, which is convenient for handling and laying, and allows to change direction according to terrain changes.
The installation cost of super executives is generally only about one-fifth of that of steel pipes and steel-plastic composite pipes.
9. The price of super executives is moderate. The total engineering cost of medium-diameter, medium-pressure and low-pressure pipes is even lower than that of seamless steel pipes, even lower than that of composite pipes and alloy pipes, but their service life is more than 6 times higher than that of steel pipes and 4 times higher than that of composite pipes, and the economic benefits are very remarkable.
10, super high-level management is applicable to crude oil gathering and transportation pipelines. Because most crude oil gathering and transportation pipelines are laid in remote areas, the terrain is complex and the climate changes greatly. The advantages of super-high-rise management are light weight, convenient installation and construction, and strong resistance to low temperature and aging, so the advantages of laying crude oil gathering and transportation pipelines are more prominent. (Not suitable for use above 35℃)
Through analysis and comparison, it can be seen that UHMWPE pipe is indeed an industrial transmission system more suitable for enterprises, with ideal performance index, obvious advantages, safety, reliability, economy and practicality. The performance of UHMWPE pipe is higher than PE 100, and it is the fourth generation plastic pressure pipe.
Shandong jinda pipeline industry co., ltd