Pipe - HDPE | Tunnel India

Definition:

High-Density Polyethylene (HDPE) pipe is a type of plastic pipe made from high-density polyethylene material. It is known for its excellent strength, durability, and resistance to chemicals and corrosion. In tunneling and underground structures, HDPE pipes are widely used for various applications such as drainage, sewage conveyance, and water supply.

Uses/benefits:

Drainage systems: HDPE pipes are commonly used for underground drainage systems in tunnels and underground structures. They provide effective water management, carrying away excess water and preventing flooding or waterlogging.
Sewage conveyance: HDPE pipes are suitable for sewage conveyance due to their resistance to chemical attack and corrosion. They can transport sewage safely and efficiently without the risk of pipe degradation or leakage.
Water supply: HDPE pipes are used for water supply pipelines in tunneling and underground structures. They are suitable for carrying potable water due to their resistance to biological growth, chemical deterioration, and leaching.
Geothermal systems: HDPE pipes are used in geothermal applications for the transportation of heated or cooled fluids underground. They offer excellent thermal conductivity and can withstand high temperatures, making them ideal for geothermal heat exchange systems.

Specifications:

Diameter: HDPE pipes are available in various diameters to accommodate different flow rates and project requirements.
Pressure rating: HDPE pipes are manufactured with different pressure ratings, indicating their capacity to withstand internal pressure. Common pressure ratings include SDR 11, SDR 17, and SDR 26.
Wall thickness: The wall thickness of HDPE pipes depends on the pressure rating and diameter. Thicker walls are used for higher pressure applications.
Jointing methods: HDPE pipes can be joined using various methods such as butt fusion, electrofusion, or mechanical couplings, depending on the project requirements and installation technique.

Types:

Solid-wall HDPE pipes: These pipes have a solid, continuous wall throughout the pipe length and are suitable for various applications.
Structured-wall HDPE pipes: These pipes have a profiled outer surface that provides additional strength and stiffness while reducing overall weight.

HDPE pipes are versatile and offer numerous benefits for tunneling and underground structures, including their lightweight nature, flexibility, chemical resistance, and long service life.