Brief introduction of PE non-excavation crossing pipe
The appearance of the original HDPE is milky white, and it is translucent to a certain extent in the thin section. PE non-excavation crossing pipes must withstand a certain pressure. Usually, PE resins with large molecular weight and good mechanical properties, such as HDPE resins, must be used. HDPE resin has a small melt viscosity, good fluidity, and easy processing, so the range of choice of its melt index is also wide, usually MI is between 0.3-3g / 10min.
PE non-excavation crossing pipes need to work in a low temperature environment. The low temperature brittleness temperature of polyethylene is extremely low, and it can be safely used in the temperature range of -60-60 ° C. During construction in winter, due to the good impact resistance of the material, the pipe will not be brittle. At the same time, resistance to stress cracking is good, and the effect of temperature changes is small.
PE non-excavation pipe can withstand the corrosion of various chemical media, and the chemicals in the soil will not cause any degradation to the pipeline. Polyethylene is an electrical insulator, so it does not rot, rust, or electrochemically corrode; it also does not promote the growth of algae, bacteria, or fungi.
PE non-excavation crossing pipes have a long service life. Polyethylene pipes containing 2-2.5% uniformly distributed carbon black can be stored or used outdoors for 50 years without being damaged by ultraviolet radiation.
To sum up, the non-excavation crossing pipe made of PE is an important material for non-excavation pipes.