Double-wall corrugated pipe is a new type of lightweight pipe made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, fast construction, and long life. Its excellent pipe wall structure design greatly reduces the cost compared with other structures of pipes. And because of its convenient and reliable connection, it is widely used at home and abroad. It replaces a large number of concrete pipes and cast iron pipes.

Features of HDPE double wall corrugated pipe

1. Unique product structure and strong pressure resistance;
2. Smooth inner wall and large flow rate;
3. The product is easy to connect, the interface is well sealed, corrosion-resistant, zero leakage, no scaling, avoids secondary pollution, and is an ideal "green pipe";
4. The product has good flexural properties and can adapt to uneven soil settlement;
5. Long service life, underground use can reach more than 50 years;
6. The product is light in weight and easy to construct, which can reduce construction costs and shorten construction period;
7. At a speed of 15 feet/second, the wear resistance is 3 to 5 times higher than that of ordinary or fine-grained steel pipes.

HDPE double-wall corrugated pipe has excellent chemical stability, aging resistance and environmental stress cracking resistance. HDPE double-wall corrugated pipe is a flexible pipe. Its main properties are 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 soil load. In this performance, HDPE double-wall corrugated pipe has obvious advantages compared with other pipes.
Low project cost
Under the condition of equal load, HDPE double-wall corrugated pipe only needs a thinner pipe wall to meet the requirements. Therefore, compared with solid wall pipes of the same material specifications, it can save about half of the raw materials, so the cost of HDPE double-wall corrugated pipe is also low. This is another outstanding feature of this pipe.
Easy construction
Because HDPE double-wall corrugated pipe is light in weight, it is easy to carry and connect, so the construction is fast and the maintenance work is simple. Its advantages are more obvious under tight construction period and poor construction conditions.
Small friction coefficient, large flow rate
HDPE double-wall corrugated pipes made of HDPE can pass a larger flow rate than other pipes of the same diameter. In other words, under the same flow requirement, HDPE double-wall corrugated pipes with relatively small diameters can be used.
Good low temperature resistance and impact resistance
The brittle temperature of HDPE double-wall corrugated pipes is -70℃. Under normal low temperature conditions (above -30℃), no special protective measures are required during construction, which is convenient for winter construction. Moreover, HDPE double-wall corrugated pipes have good impact resistance.
Good chemical stability
Since HDPE molecules have no polarity, they have excellent chemical stability. Except for a few strong oxidants, most chemical media do not damage them. The soil, electricity, acid and alkali factors in the general use environment will not damage the pipe, will not breed bacteria, will not scale, and its flow area will not decrease with the increase of operating time.
Long service life
Under the condition of not being exposed to sunlight ultraviolet rays, the service life of HDPE double-wall corrugated pipes can reach more than 50 years.
Excellent wear resistance
Germany has proved through experiments that the wear resistance of HDPE is even several times higher than that of steel pipes.
Appropriate deflection
A certain length of HDPE double-wall corrugated pipe can be slightly deflected in the axial direction, and is not affected by a certain degree of uneven settlement of the ground. It can be laid directly in a slightly crooked groove without pipe fittings, etc.

Application of HDPE double wall corrugated pipe

1. Municipal drainage and sewage pipeline system engineering;
2. Underground drainage and sewage in apartments and residential areas;
3. Pre-buried pipelines in highways and underground seepage pipes in golf courses;
4. Water conservancy projects such as irrigation and drainage of farmland;
5. Fluid transportation and ventilation in chemical and mining industries;
6. Protective casings for underground pipelines and protective casings for communication cables, etc.

Siffo HDPE double wall corrugated pipe production standards
International standards:
ISO 9969: Plastic pipe systems - Ring stiffness test of polyethylene (PE) pipes
EN 1401: European standard for plastic pipe systems for underground drainage and sewage
Chinese standards:
GB/T 19472: Polyethylene (PE) double wall corrugated pipe for underground use
CJ/T 225: Polyethylene (PE) double wall corrugated pipe for urban drainage