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What do you know about HDPE Drainage Pipes?

What do you know about HDPE Drainage Pipes?

HDPE drainage pipe is a general term for thermoplastic round pipes without internal pressure, HDPE drainage pipe is a replacement product for traditional steel pipe and PVC drainage pipe. It mainly undertakes the drainage tasks of rainwater, sewage, farmland drainage, and irrigation.

HDPE pipe features:

  1. Unique product structure and strong pressure resistance;
  2. Smooth 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, yes “green pipe”;
  4. The product has good flexural properties and can adapt to the uneven settlement of soil;
  5. Long service life, buried use can reach more than 50 years;
  6. The product is light in weight, easy to construct, can construct cost, and shorten the construction period;

Connection methods for HDPE pipes: hot melt welding and flange connection.

Hot melt welding is available for all HDPE pipe diameters. The connection features are rigid connection, no disassembly, and tensile strength.
Hot-melt welding is one of the easiest pipe connection methods. and it provides many convenient and favorable preconditions for the prefabrication and installation of the entire system without the need for other components.
Therefore, whether the prefabricated installation is on-site or in the workshop, the connection can be made by means of heat fusion welding.
The welding section of hot melt welding is very small, the welding edge will not interfere with the pipeline, and the internal section of the pipeline will not change at all. The thickness of the welded surface is almost the same as the thickness of the pipe wall, so no pipe is wasted. With hot melt welding, pipe lengths and elbows can be fully utilized.

Flange Connection:

non-rigid connection, disassembly, and tensile strength.
The flange connection method is usually used as a detachable connector on low-pressure transmission pipelines (factories, water pumps, storage tanks, and swimming pools). In addition, the flange connection method is also the simplest connection method with cast iron pipes and steel pipes. Flange blinds are available for inspection port openings.

Advantages of HDPE pipes:

Good chemical resistance


HDPE pipes are resistant to corrosion by various chemical media, and the chemicals present in the soil will not cause any degradation to the pipes, Polyethylene is an electrical insulator, so it does not rot, rust, or electrochemically corrode; it also does not promote algae, bacterial or fungal growth.

Good wear resistance

The wear resistance comparison test of HDPE pipe and steel pipe shows that the wear resistance of HDPE pipe is 4 times that of steel pipe. In the field of mud transportation, compared with steel pipes, HDPE pipes have better wear resistance, which means that HDPE pipes have a longer service life and better economy.

Small resistance to water flow

HDPE pipe has a smooth inner surface with a Manning coefficient of 0.009. The smooth performance and non-adhesive properties ensure that the HDPE pipe has a higher conveying capacity than traditional pipes, and also reduces the pressure loss of the pipeline and the energy consumption of water conveying.

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