Ultra-high molecular weight polyethylene (UHMWPE) is a new kind of engineering thermoplastics with more than 3 million viscosity-average molecular weight. Ultra-high molecular weight polyethylene pipe has superior performance over conventional HDPE pipe such as very high wear resistance, impact resistance, excellent resistance to internal pressure strength, resistance to environmental stress cracking, intrinsically self-lubricating, anti-adhesion, low temperature resistance and excellent chemical resistance.
Ultra-high molecular weight polyethylene (UHMW-PE) is the role of special catalyst, polymerization of viscosity-average molecular weight greater than 2.5 million engineering thermoplastics . Ultra high molecular weight polyethylene pipe with high wear resistance, friction coefficient is extremely small , impact resistance , corrosion resistance, non-scaling , the excellent anti- pressure strength , resistance to environmental stress cracking resistance, good self-lubricating , anti-stick attached , unique low temperature resistance , excellent chemical stability, superior performance , is the most cost-effective pipeline was wearable , long-term at -269 degrees to +80 degrees working conditions , are widely used in metallurgical and mining beneficiation , power plants, grain silos , acid and alkali transport , tailings, slurry and coal transportation , terminals, shipyards, oil, natural gas , textiles, paper , food, chemical , mechanical, electrical and other industries.
Can be a lot of use in wastewater treatment , pipelines , there are pipeline external corrosion requirements for long-distance transmission of great significance ; due to the thermal conductivity of this pipe is not ten thousand times smaller pipe , can greatly reduce the cost of transporting pipe insulation for the winter in cold regions and transportation of crude oil and other materials are of great significance , can be replaced by stainless steel, wear-resistant alloy tube , plastic composite pipe and other special pipe.
1 wear characteristics
Ultra-high molecular weight polyethylene pipe molecular weight of up to 250 million more than the tube , the friction coefficient is extremely small , it has a high resistance to sliding friction capability. Wear six times higher than normal alloy steel , stainless steel, 29 times . Is 19 times the phenolic resin , nylon six seven times , five times polyethylene , greatly improve the life of the pipeline.
2 the corrosion resistance
UHMW-PE is a saturated molecules structure, so its high chemical stability, corrosion resistance of the product can be harsh chemicals , strong acids except for some slight corrosion at high temperatures , as in other lye , acid in from corrosion. Can be used in a concentration of less than 85% of concentrated hydrochloric acid at a concentration of less than 80% sulfuric acid , nitric acid concentration of less than 20% of the performance is quite stable.
3 anti- impact resistance
In the existing engineering plastics highest impact toughness of ultrahigh molecular weight pipeline , many materials in serious or repeated shock of the explosion would crack , damaged, broken or surface stress fatigue . The product according to GB1843 standards, Izod impact test without damage, and strong to withstand external shocks, internal overload and pressure fluctuations.
4 self-lubricating
Since the ultrahigh molecular weight polyethylene tube containing a waxy substance , and good self-lubricating . Friction coefficient (196N, 2.5 hours) only 0.217MN / m (GB3960). Oil lubricated sliding properties than their steel or brass . Especially in harsh environments , dust, sand and more places , the product itself more fully dry lubricating properties displayed . Not only freedom of movement and protection of related artifacts do not wear or strain.
5 low temperature resistance
Ultrahigh molecular weight polyethylene pipe excellent in low temperature resistance , impact resistance , abrasion resistance of minus 269 degrees when substantially constant . Is a kind of plastic is currently the only operating at near absolute zero temperature. Meanwhile, the optimum temperature of UHMWPE pipe width , long-term work at a temperature of -270 ℃ to 80 ℃ .
6 easy scaling of
Because of ultra high molecular weight polyethylene pipe friction coefficient is small and non-polar , so it has good adhesion to the surface of non- pipe finish . Existing materials in general PH value of 9 or more media in both scale , ultra-high molecular weight polyethylene pipe is not scaling, this feature is used for the power plant fly ash system has great significance. In crude oil, mud and other pipelines is also very applicable .
7 long service life
UHMWPE molecular chain unsaturated genes less fatigue strength of more than 50 million times , optimal resistance to environmental stress cracking resistance , resistance to environmental stress cracking > 4000h, is more than 2 times the PE100 , buried about 50 years of use , still maintain more than 75% of the mechanical properties.
8 easy to install
Ultra-high molecular weight polyethylene (UHMW ---- PE) pipe unit pipe length accounts for only one-eighth the weight of steel , making loading and unloading, transportation, installation more convenient , and can reduce labor intensity of workers , UHMW-PE pipe aging resistance strong , 50 years aging. Whether on the ground erection, or can be buried underground . When installing either welded or flanged connections are safe, reliable, convenient , no corrosion, saving labor , which fully reflects the use of ultra high molecular weight polyethylene pipe "energy , environmental, economic , and efficient" superiority.
9 other features
Ultra high molecular weight polyethylene pipe can still suck , suck noise , antistatic, electronic shielding capability , non-absorbent , light weight, easy machining , coloring and other prominent features.