Pipe - Steel | Tunnel India

Definition:

Steel pipes are cylindrical hollow tubes made primarily from steel, a strong and durable material. In the context of tunneling and underground structures, steel pipes are used for various applications, including drainage, ventilation, water supply, and conveyance of utilities. They are designed to withstand the demanding conditions underground, providing structural integrity and reliable performance.

Uses/benefits:

Drainage: Steel pipes are used for underground drainage systems, effectively carrying away surface and groundwater to prevent flooding and maintain stable tunnel conditions.
Ventilation: Steel pipes are employed for ventilation systems, facilitating the flow of fresh air into tunnels and underground structures, ensuring adequate air quality and promoting a safe working environment.
Water supply: Steel pipes can be utilized for water supply systems within tunnels and underground facilities, providing a reliable and efficient means of delivering water for various purposes, such as firefighting, construction activities, and facility operation.
Utility conduits: Steel pipes serve as conduits for various utilities, including electrical cables, telecommunication lines, and fiber optics. They protect these utilities from external elements and provide a secure pathway for their installation and maintenance.

Specifications:

Diameter: Steel pipes come in various diameters, ranging from small diameters for drainage and ventilation purposes to larger diameters for water supply and utility conduits.
Wall thickness: The thickness of the steel pipe walls can vary depending on the intended use and the structural requirements. Thicker walls provide increased strength and durability.
Coatings: Steel pipes used in tunneling and underground structures may have protective coatings to enhance corrosion resistance and prolong their lifespan. Common coatings include epoxy, polyethylene, and zinc coatings.
Connection methods: Steel pipes can be connected using different methods such as welded joints, flanged connections, or mechanical couplings, ensuring secure and leak-proof connections.

Types:

Seamless steel pipes: These pipes are manufactured without any seams or welds, providing excellent strength and integrity. They are commonly used in high-pressure applications or where smooth flow is critical.
Welded steel pipes: These pipes are made by welding steel plates or coils together. They are cost-effective and suitable for a wide range of applications, including drainage, ventilation, and utility conduits.
Galvanized steel pipes: These pipes are coated with a layer of zinc to enhance corrosion resistance. They are commonly used in applications where corrosion protection is essential, such as water supply and underground drainage.
Ductile iron pipes: Although not made of steel, ductile iron pipes are commonly used in tunneling and underground structures due to their durability and strength. They are resistant to external loads and provide reliable performance for drainage and utility applications.

The selection of steel pipes for tunneling and underground structures depends on factors such as the intended use, operating conditions, required strength, and local regulations.