HDPE Corrugated pipe
⑴Reliable connection: the polyethylene pipe system is connected by electric heat melting, and the strength of the joint is higher than the strength of the pipe body.
⑵Good low-temperature impact resistance: The low-temperature embrittlement temperature of polyethylene is extremely low, and it can be used safely in the temperature range of -60-60℃. During construction in winter, because the material has good impact resistance, the pipe will not be brittle.
⑶ Good stress cracking resistance: HDPE has low notch sensitivity, high shear strength and excellent scratch resistance, as well as outstanding environmental stress cracking resistance.
⑷Good chemical corrosion resistance: HDPE pipelines can withstand the corrosion of a variety of chemical media, and the chemical substances in the soil will not cause any degradation to the pipeline. Polyethylene is an electrical insulator, so it will not rot, rust or electrochemical corrosion; in addition, it will not promote the growth of algae, bacteria or fungi.
⑸Aging resistance and long service life: The polyethylene pipe containing 2-2.5% evenly distributed carbon black can be stored or used outdoors for 50 years without being damaged by ultraviolet radiation.
⑹ Good abrasion resistance: The comparison test of the abrasion resistance of HDPE pipes and steel pipes shows that the abrasion resistance of HDPE pipes is 4 times that of steel pipes. In the field of mud transportation, HDPE pipes have better wear resistance than steel pipes, which means that HDPE pipes have a longer service life and better economy.
⑺ Good flexibility: The flexibility of HDPE pipeline makes it easy to bend. In engineering, obstacles can be bypassed by changing the direction of the pipeline. In many cases, the flexibility of the pipeline can reduce the amount of pipe fittings and reduce installation costs.
⑻Small water flow resistance: HDPE pipe has a smooth inner surface, and its Manning coefficient is 0.009. The smooth performance and non-adhesive properties ensure that HDPE pipes have a higher conveying capacity than traditional pipes, and at the same time reduce the pressure loss of the pipes and the energy consumption of water transmission.
⑼Convenient handling: HDPE pipes are lighter than concrete pipes, galvanized pipes and steel pipes. It is easy to handle and install. Lower manpower and equipment requirements mean that the installation cost of the project is greatly reduced.
⑽Various new construction methods: HDPE pipeline has a variety of construction technologies. In addition to traditional excavation methods, it can also use a variety of new non-excavation technologies such as pipe jacking, directional drilling, liner, It is a good choice for some places where excavation is not allowed.
High-density polyethylene (HDPE) has excellent chemical stability, aging resistance and environmental stress cracking resistance. The HDPE double-wall corrugated pipe produced from it is a flexible pipe. Its main performance is as follows:
Strong resistance to external pressure
The outer wall has a ring-shaped corrugated structure, which greatly enhances the ring stiffness of the pipe, thereby enhancing the resistance of the pipe to soil loads. In this performance, HDP giant 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 phase pipes of the same material and specifications, it can save about half of the raw materials, so the cost of HDPE double-wall corrugated pipes is also lower. This is another outstanding feature of the pipe.
As HDPE double-wall corrugated pipe is light in weight, easy to carry and connect, so the construction is quick and the maintenance is simple. In tight schedule and construction.
Under poor conditions, its advantages are even more obvious.
Small friction coefficient, large flow
HDPE double-wall corrugated pipes made of HDPE can pass a larger flow rate than other pipes of the same caliber. In other words, under the same flow requirements, HDPE double-wall corrugated pipes with a relatively small diameter can be used.
Low temperature and impact resistance
The embrittlement temperature of HDPE double-wall corrugated pipe is -70℃. Under normal low temperature conditions (above -30℃), special protective measures are not necessary for construction. The construction is convenient in winter. In addition, HDPE double-wall corrugated pipe has 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 can't damage it. The soil, electricity, and acid-base 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.
The life of HDPE double-wall corrugated pipe can reach more than 50 years under the condition of not being exposed to sunlight and ultraviolet rays.
Excellent wear resistance
Germany has used tests to prove that the wear resistance of HDPE is even several times higher than that of steel pipes.
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 on the ground. It can be directly laid in a slightly uneven groove without pipe fittings, etc.