HDPE double-walled bellows

HDPE double-walled bellows, as an innovative model in the field of pipes, uses high-density polyethylene (HDPE) as raw material to create a structure with a unique circular corrugated outer wall and a smooth and flat inner wall through advanced technology. This exquisite design makes it an ideal choice for pipes in many fields, such as performance, cost, and construction.

1. Product structure

The pipe wall of HDPE double-walled bellows is composed of two layers, inner and outer. The inner layer is as smooth as a mirror, which can greatly reduce the resistance during fluid transportation, ensure the smooth passage of water flow or other media, and effectively improve the transportation efficiency. The outer layer has a regular circular corrugated shape, which is like a strong armor for the tube. This corrugated structure significantly enhances the ring stiffness of the pipe, allowing it to easily withstand heavy pressure from the outside, whether it is buried deep underground under the enormous pressure of the soil or facing loads generated by ground vehicles, etc., it can remain stable and not easily deformed or damaged.

2. Performance advantages

Ultra-high strength and impact resistance: With its unique outer wall corrugated structure, the ring stiffness of HDPE double-walled bellows is greatly improved, and it can withstand several times more external pressure than ordinary pipes. In the face of extreme situations such as sudden ground subsidence and large-scale mechanical rolling, it can still maintain structural integrity, show strong impact resistance, and provide a solid guarantee for the safe operation of the pipeline system.

Excellent Corrosion Resistance: HDPE material itself is highly chemically stable with no polarity in its molecular structure, which makes it highly resistant to most chemical media. Whether it is the strong acid and alkali in industrial wastewater or the corrosive substances that may exist in the soil, it is difficult to erode it. Compared with metal pipes that are prone to rust and concrete pipes that are easily corroded by acid and alkali, the corrosion resistance of HDPE double-walled bellows greatly extends its service life without frequent replacement, reducing maintenance costs.

Excellent aging resistance: Under normal use, HDPE double-walled bellows are not prone to aging, even if they are exposed to the natural environment for a long time. Its UV resistance is good, which can effectively resist ultraviolet radiation in sunlight and slow down the aging rate of materials. With a service life of more than 50 years under buried conditions protected from direct sunlight and UV rays, it provides a long-term reliable piping solution for engineering projects.

Good low-temperature resistance: The tube has a brittleness temperature as low as -70°C, which means it maintains good flexibility and mechanical properties even in cold winters, even in extremely cold regions. When constructing in a low temperature environment, there is no need to take complex special protection measures, and the construction personnel can operate normally, which greatly broadens the construction time window and ensures that the project progress is not affected by low temperature weather.

Excellent hydraulic performance: The smooth inner wall allows HDPE double-walled bellows to have a minimal coefficient of friction, allowing for greater flow than other pipes of the same caliber. Under the same flow requirements, HDPE double-walled bellows with a relatively small diameter can be selected, which not only saves pipe costs, but also reduces the space occupied by the piping system, providing more flexibility in engineering design. At the same time, good hydraulic performance can also reduce energy consumption in the conveying process, achieving energy conservation and environmental protection.

3. Environmental protection characteristics

Green and environmentally friendly materials: HDPE is a non-toxic, odorless, and environmentally friendly material that will not cause any pollution to the environment during production, use, and disposal process. Compared with traditional cast iron pipes and concrete pipes, it does not contain harmful heavy metals, will not leach harmful substances into the soil, and is not harmful to groundwater resources and soil environment, which meets the strict requirements of modern society for green building materials.

Recyclable: HDPE double-walled bellows can be recycled and reprocessed into various plastic products or tubes at the end of their service life. This recyclability not only helps reduce resource waste and dependence on raw materials but also effectively reduces the pressure of waste on the environment, making positive contributions to sustainable development.

4. Convenience of construction

Light weight and easy handling: Compared with cast iron pipes and concrete pipes, HDPE double-walled bellows are significantly lighter, which greatly reduces the manpower and machinery required during the handling, loading and unloading of pipes. Construction personnel can easily transport it to various locations on the construction site, especially in narrow spaces or areas with inconvenient transportation, its weight advantage is more prominent, greatly improving construction efficiency and reducing labor intensity.
Simple and reliable connection method: The pipe usually adopts an elastic sealing ring socket connection or an electrofusion connection. The elastic sealing ring socket connection is easy to operate, just insert the socket end of the pipe into the socket end with the elastic sealing ring to achieve a quick connection, and the connection has good sealing performance, effectively preventing leakage. The electrofusion connection is through special electrofusion equipment to melt and fuse the plastic at the pipe connection part to form a solid connection joint. No matter which connection method, there is no need for complex construction technology and professional equipment, and ordinary construction personnel can master it proficiently after simple training.

Short Construction Cycle: Due to its light weight and easy connection, HDPE double-walled bellows can be quickly installed during construction, reducing construction time. Compared with traditional pipes, it can greatly shorten the construction period of the entire pipeline system, so that the project can be put into use faster, saving time costs for the owner and improving the efficiency of capital use.

5. Application scenarios

Municipal drainage and sewage systems: In the streets and alleys of cities, HDPE double-walled bellows undertake the important task of collecting and discharging rainwater and sewage. Its strong compressive resistance and corrosion resistance can adapt to the complex underground environment of the city, ensure the long-term stable operation of the drainage and sewage system, and effectively avoid urban waterlogging and environmental pollution caused by pipe rupture and leakage.

Construction Engineering: In various construction projects, whether it is underground drainage pipes in residential complexes or stormwater drainage systems in commercial buildings, HDPE double-walled bellows can play its advantage. It can not only meet the needs of internal drainage of buildings, but also smoothly connect with the municipal drainage pipe network to ensure the efficient operation of the building drainage system.

Traffic engineering: In the construction of transportation infrastructure such as highways and railways, HDPE double-walled bellows can be used for road drainage and underground communication, as well as the protection of power pipelines. Its good flexibility and anti-settlement properties can adapt to slight deformation and settlement that may occur during road use, ensuring smooth drainage and pipeline safety.

Water conservancy engineering: In the field of water conservancy projects such as farmland irrigation, water conservancy transmission and drainage, HDPE double-walled bellows also play a big role. It can be flexibly laid according to the topography of the farmland, and its corrosion resistance makes it less likely to be damaged in long-term contact with water and soil, providing a reliable guarantee for the normal operation of agricultural production and water conservancy facilities.

Industrial field: In industrial enterprises such as chemical industry and mining, HDPE double-walled bellows can be used to transport various corrosive industrial wastewater, exhaust gas, and ventilation. Its excellent chemical stability and high strength can meet the strict requirements for safe and reliable operation of pipelines in industrial production, effectively prevent the leakage of industrial pollutants, and protect the environment and production safety.