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  4. The difference between HDPE double-wall ...

The difference between HDPE double-wall corrugated pipe and PVC double-wall corrugated pipe

The difference between HDPE double-wall corrugated pipe and PVC double-wall corrugated pipe


1. UPVC double-wall corrugated pipe


UPVC double-wall corrugated pipe, also known as PVC-U double-wall corrugated pipe, is a special pipe made of polyvinyl chloride as the main raw material, with smooth inner wall, corrugated outer wall and hollow inner and outer walls. The pipe has beautiful appearance, unique structure, high strength, smooth inner wall, low friction resistance, large circulation, no need for concrete foundation, light weight, easy handling and installation, fast construction; rubber ring socket connection, reliable method, construction Easy quality assurance; flexible interface. Strong anti-uniform settlement ability; good anti-leakage effect, UPVC double-wall corrugated pipe can resist the erosion of various chemical media; there is no scaling in the pipe, basically no dredge, and the buried service life is more than 50 years.


Physical performance


The connection seal test does not break, and the leakage impact test TIR≤10% ring stiffness S1≥4KN / ㎡, S2≥8KN / ㎡ ring flexibility does not break, the two walls do not disengage from the oven test, there is no splitting, cracking, bubble Manning roughness n = 0.010.


2. HDPE double-wall corrugated pipe




HDPE double-wall corrugated pipe, also known as polyethylene double-wall corrugated pipe, is a new type of lightweight pipe material made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, fast construction and long service life. It is excellent Compared with other structural pipes, the cost of the design of the pipe wall structure is greatly reduced. And because of the convenient and reliable connection, it is widely used at home and abroad. Substantially replace concrete pipes and cast iron pipes. Performance characteristics:


HDPE double-wall corrugated pipe has excellent chemical stability, aging resistance and environmental stress cracking resistance. The HDPE double-wall corrugated pipe produced from it as a raw material is a flexible pipe. Its performance is as follows:


Strong resistance to external pressure: the outer wall has an annular corrugated structure, which greatly enhances the ring stiffness of the pipe, thereby enhancing the resistance of the pipe to the soil load. In this aspect, HDPE double-wall corrugated pipe has obvious advantages compared with other pipes Advantage. Low project cost: Under equal load conditions, HDPE double-wall corrugated pipe only needs a thinner wall to meet the requirements. Therefore, compared with solid wall pipes of the same material specifications, about half of the raw materials can be saved, so the cost of HDPE double-wall corrugated pipes is also lower. This is another very prominent feature of the pipe.


Convenient construction: Due to the light weight of HDPE double-wall corrugated pipe, it is convenient to carry and connect, so the construction is fast and the maintenance work is simple. In the case of tight construction period and poor construction conditions, its advantages are more obvious. Good low temperature resistance and impact resistance: The embrittlement temperature of HDPE double-wall corrugated pipe is -70 ℃. Under low temperature conditions (above -30 ℃), special protection measures are not necessary during construction. It is convenient to construct in winter, and HDPE double-wall corrugated pipes have good impact resistance.


Good chemical stability: Since HDPE molecules have no polarity, MPVE double-wall bellows has excellent chemical stability. Except for a few strong oxidants, most chemical mediators are not destructive. Generally, the soil, power, acid and alkali factors of the environment will not damage the pipeline, and will not breed bacteria or scale, and its flow area will not decrease with the increase of operating time.


long lasting:


The HDPE double-wall corrugated pipe can be used for more than 50 years without being exposed to sunlight and ultraviolet rays. A certain length of HDPE double-wall corrugated pipe can be slightly deflected in the axial direction, and is not affected by the uneven settlement of the ground to a certain extent. It can be directly laid in a slightly uneven groove without using pipe fittings. Advantage:


1. The structure is unique, the strength is high, the impact resistance is compressed, the wall is smooth, the friction of the UPVC double-wall corrugated pipe is excessive flow; the communication is convenient and the joint is sealed without leakage.


2. Light weight, fast construction speed, low operating cost and lower cost.


3. Polyethylene hydrocarbon polymer molecules have lived in extremely acidic and alkaline buried ground for more than 5 years, and are green, non-toxic, non-corrosive, and non-scaling.


4. Light weight, fast construction and lower cost.


5. The service life of the buried ground is more than fifty years.

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