High densityPolyethylene (HDPE) has excellentChemical stability, aging resistance and resistanceEnvironmental stress crackingperformance. It is produced as a raw materialHDPE double-walled bellowsIt belongs to flexible tubes. The key features are as follows:
Strong resistance to external pressure
The outer wall has a circular corrugated structure, which is greatly enhancedTubesThe ring stiffness enhances the resistance of the pipe to soil loads, and in this regard, HDPE double-walled bellows has obvious advantages compared with other pipes.
The project cost is low
Under the same load conditions, HDPE double-walled bellows only needs a thinner pipe wall to meet the requirements. Therefore, compared with solid-walled pipes of the same material specifications, about half of the raw materials can be saved, so the cost of HDPE double-walled bellows pipes is also lower. This is another outstanding feature of this pipe.
Easy to construct
Because HDPE double-walled bellows are lightweight, easy to handle and connect, so the construction is fast and the maintenance work is simple. During the tight construction period, the construction was tight
In poor conditions, its advantages are even more obvious.
The friction coefficient is small and the flow rate is large
HDPE double-walled bellows with HDPE as material can pass a larger flow rate than other pipes of the same caliber. In other words, under the same flow requirements, HDPE double-walled bellows with a relatively small diameter can be used.
Low temperature and impact resistance
HDPE double-walled bellowsEmbrittlement temperatureIt is -70°C. Generally, there is no need to take special protective measures during construction under low temperature conditions (above -30°C), which is convenient for construction in winter, and HDPE double-walled bellows has good impact resistance.
Good chemical stability
Since HDPE molecules are not polar, they have excellent chemical stability. Except for a few strong oxidants, most chemical media have no destructive effect on it. The soil, electricity, acid and alkali factors of the general use environment will not damage the pipeline, will not breed bacteria, will not scale, and its circulation area will not decrease with the increase of operating time.
Long service life
Under the condition of not being exposed to sunlight and ultraviolet rays, HDPE's double-walled bellows can last up to more than 50 years.
Excellent wear resistance
Germany has proved that the wear resistance of HDPE is even better than that of HDPESteel pipeIt is several times higher.
Proper flexure
A certain length of HDPE double-walled bellows can be slightly flexed axially, and it is not affected by a certain degree of uneven settlement of the ground, so it can be dispensed withPipe fittingsIt is directly laid in a slightly unstraight trench and so on.
