Ultra high molecular weight polyethylene tube

Ultra-high molecular weight polyethylene pipe uses a special extruder and a specially designed die to continuously extrusion-extrude the UHMWPE. This pipe has excellent comprehensive performance, and is wear-resistant, low-temperature resistant, corrosion-resistant, self-lubricated, and impact-resistance highest in all plastics. Wear resistance is superior to PTFE, nylon, carbon steel, etc. Working at -169 to +80°C is called "amazing" engineering plastics!

Ultrahigh molecular weight polyethylene (UHMW---PE) pipe technology is becoming more and more mature in China. More and more projects have adopted this type of pipe. It has become a new type of thermoplastic engineering plastic with excellent price performance. It has almost concentrated various The advantages of plastic, wear resistance, impact resistance, self lubrication, corrosion resistance, low temperature resistance, hygienic non-toxic, non-stick, non-absorbent and other comprehensive performance, is an ideal pipe, can be used for a variety of highly corrosive, high wear The transport of liquid or solid liquid mixture, such as various acid liquids, lye, crude oil, tailings, mud, coal water slurry and power plant ash discharge, slag discharge and so on. Compared with seamless steel tubes, UHMW-PE pipes have significant advantages, increase service life, and can increase their service life several times or even tens of times under strong corrosive and high wear conditions; due to the inner wall of such pipes. Non-stick (non-fouling) properties and low friction coefficient, can reduce the delivery pressure or reduce the diameter of the delivery pipe, which is of great significance for long-distance transportation. Because the thermal conductivity of this pipe is 10,000 times smaller than steel, it can greatly reduce The insulation cost of the transmission pipeline is of great significance for the transportation of crude oil and other materials in cold regions and in winter.

1. Impact resistance of ultra-high-polymer polyethylene pipes. Ultra-high molecular weight polyethylene pipes have the highest resistance to environmental stress, cracking and scratching resistance, among which impact strength is 10 times higher than PE100 at room temperature and 16 times higher than PE100 at -30°C; The cracking capacity is about twice that of PE100, and the lower the ambient temperature, the stronger the impact resistance. Its extraordinary flexibility makes it possible to withstand the impact of various external forces and deformation of the crust without the need for a composite steel pipe, and it is safer and more reliable than steel pipe.

2. The abrasion resistance of UHMWPE pipe is 4-7 times that of steel, 10 times that of polyethylene and polypropylene, 2-3 times that of PE, and the effect of conveying small particles such as fly ash is better. .

3, ultra-high molecular weight polyethylene pipe has superior corrosion resistance, ultra-high molecular polyethylene is a saturated molecular structure, chemical properties are very stable, resistant to a variety of corrosive media and organic solvents, than polyethylene, Polypropylene, nylon, ABS and other plastics are more resistant to corrosion.

4. The ultra-high molecular weight polyethylene pipe is non-adhesive, and its chemical and physical polarity is lower than that of ordinary plastics. For example, the polarity of polyethylene is 9, and the height is only one. It is certainly lower than metal materials, so ordinary adhesives do not work for ultra high. Also, fouling substances are difficult to attach. As long as the slurry flow rate reaches 2.3 to 4.6 meters/second, fouling is difficult to form. Even if it accumulates and forms scales slowly over a long period of time, it is not strong and is easily removed. And pickling does not need to add corrosion inhibitors, the surface is smooth after pickling, the wall is not infringed.

5. The theoretical service life of ultra-high-polymer polyethylene pipes can reach several hundred years. The aging rate and brittleness rate of ultra-high-polymer polyethylene pipes are very slow. After being used for 50 years, the mechanical properties of the ultra-high-polymer polyethylene pipes are reduced by only about 20%. The performance of high-molecular polyethylene pipe is better than that of PE100. The anti-aging performance of PE pipe is about 1/4 higher than that of PE100 pipe. The UV resistance is the same as that of PE100, and 2.5% carbon black is added according to national regulations. Fatigue strength is more than 16 times higher than PE100.

6, the ultra-high molecular polyethylene pipe friction coefficient is only 1/6 of the new steel, 1/5 of ordinary polyethylene, rubber 1/20, polypropylene 1/2. The flow coefficient "C" of the ultra-high pipeline is 160. The new steel pipe is only 130, and the old steel pipe is reduced to 95. For the bad working conditions of mortar transportation, the "C" index of steel pipe is only 60-80. In addition, ultra-high wear resistance, non-stickiness, and corrosion resistance make the pipe wall always smooth and unobstructed. The flow capacity is generally more than 50% higher than that of a steel pipe, and the transmission system maintains a low-voltage open state for a long period of time.

7, ultra-high molecular weight polyethylene pipe tensile strength and tensile strength is high, the heat distortion temperature is more than ten times that of ordinary plastic, and cold and brittle temperature has almost no lower limit, plus 100% elongation, so In a large temperature range, it is subjected to large tube stress, absorbs shock loads and shuts off water pressure fluctuations.

8, the installation of ultra-high molecular polyethylene pipe is very simple, can be flanged, but also welding. The welding process is simple, intuitive and highly efficient. The weld strength exceeds the pipe body and provides convenience and guarantee for the installation of long-distance pipelines, especially medium and high-pressure pipelines. Ultra-high-polymer polyethylene pipes need no anti-corrosion, and the pipes are light and soft, easy to move and lay, and allow to change course according to changes in the terrain.

The installation cost of ultra-high-polymer polyethylene pipes is generally about one-fifth that of steel pipes and steel-plastic composite pipes.

9, ultra-high molecular weight polyethylene pipe is relatively moderate. The total engineering cost of medium-diameter, medium- and low-pressure pipelines is even lower than that of seamless steel tubes, and is lower than that of composite tubes and alloy tubes. The service life is more than 6 times that of steel tubes and 4 times that of composite tubes, and the economic benefits are significant.

10. Ultra-high-polymer polyethylene pipes can also be used for crude oil gathering and transmission pipelines. Because most of the crude oil gathering and transmission pipelines are laid in remote areas, the land conditions are complicated, and climate change is unfavorable, so the advantage of super-high-rises is that they are lightweight. Installation and construction are convenient, low temperature resistance, and anti-aging, so the laying of crude oil gathering and transmission pipelines, its advantages are more prominent.

Ultra-high-molecular-weight polyethylene pipes are more suitable for long-distance transportation of industrial and mining enterprises and are currently the most cost-effective transmission pipelines.

The ultra-high molecular weight polyethylene pipe produced by Shandong Jinda Pipe Co., Ltd. is a high-molecular-weight polyethylene material that is extruded through a special extruder. The ultra-high molecular weight polyethylene (UHMWPE) used in the ultra-high molecular weight polyethylene pipe produced by Shandong Jinda Pipe is a linear structure polyethylene with a viscosity average molecular weight of more than 2.5 million. It concentrates the advantages of various plastics and has other plastics. Comparable properties such as wear resistance, impact resistance, self lubrication, corrosion resistance, low temperature resistance, non-adhesion, etc. Compared with ordinary PE pipe, all properties have advantages, especially the impact strength is ordinary polyethylene pipe More than four times, but it is "it's not bad, it's not broken, it's not bad." High cost performance.

1. Excellent impact performance, more suitable for the harsh environment of coal mines:

The impact resistance of ultra-high molecular weight polyethylene pipes in coal mines ranks first among plastics, and it is difficult to crack them whether it is strong external impact or internal pressure fluctuations. Its impact strength is 10 times that of nylon 66, 20 times that of polyvinyl chloride, and 8 times that of polytetrafluoroethylene. It is 4 times higher than that of ordinary polyethylene. Especially at low temperatures, the impact strength reaches the highest value. Flexibility provides extremely safe and reliable protection for conveyor systems.

Ultra high molecular weight polyethylene pipe and other materials impact performance comparison table

material

Ultra High Molecular Weight Polyethylene ( UHMWPE )

Ordinary HDPE

PA66

PC

ABS

Impact strength kJ/m 2

130

37

8

80

15

2, wear resistance:

In all current engineering plastics, the abrasion resistance of coal mine ultra-high molecular weight polyethylene pipe is the highest in plastics. The higher the molecular weight, the more wear-resistant the material is, and the service life is 4-6 times that of steel pipe under strong corrosion and high wear conditions. It is 9 times that of normal polyethylene; it also increases delivery efficiency by 20%.

3, good tensile properties:

Coal mine ultra high molecular weight polyethylene pipe tensile strength of 22 ~ 28MPa, elongation at break more than 400%.

4, corrosion resistance:

The ultra-high molecular weight polyethylene pipes in coal mines have high chemical stability. Except that some strong oxidizing acids can be slightly corroded at high temperatures, other acids and alkalis are not easily corrosive and resistant to aging.

5, very low friction coefficient, fluid resistance is small:

The coal mine ultra-high molecular weight polyethylene pipe wall has a high degree of smoothness and a small coefficient of friction.

6. Non-fouling: The ultra-high molecular weight polyethylene pipe in the coal mine has very weak surface adsorption force and strong anti-adhesion ability, so the inner and outer surfaces of the pipe material do not adhere to or foul.

7, easy connection:

The coal mine ultra-high molecular weight polyethylene pipe can be flanged directly on the mother's body, eliminating the need to weld pipe fittings, avoiding fractures due to poor welding of the pipe fittings, and saving the cost of fittings. The ordinary PE pipe flange connector easy to break.

8, flame retardant, anti-static performance is stable: coal mine ultra-high molecular weight polyethylene pipe, flame retardant, anti-static properties are good, have reached the coal safety standards.

9, ultra-high molecular weight polyethylene pipe in coal mines, long life: downhole life of more than 20 years.