Processing and production of φ100mm galvanized metal concrete prestressed corrugated pipes

Processing and Production of φ100mm Galvanized Metal Concrete Prestressed Corrugated Pipe

Prestressed galvanized metal corrugated pipe is a key material commonly used in post-tensioned prestressed concrete structures, primarily for forming and protecting ducts for prestressing tendons (such as steel strands or rebars). Below is a detailed introduction:

1. Basic Features

• Material: Made from high-quality galvanized steel strips, offering excellent rust and corrosion resistance.
• Structure: Spiral corrugated design, combining flexibility and compressive strength for easy bending during construction.
• Function: Maintains duct shape during concrete pouring and integrates with prestressing tendons through grouting in later stages.

2. Core Advantages

• Corrosion Resistance: The galvanized layer effectively resists moisture, chloride ions, and other corrosive elements, extending service life.
• High Stiffness: The corrugated structure enhances compressive capacity, preventing deformation during concrete vibration.
• Construction Convenience: Lightweight and bendable, adapting to complex reinforcement layouts.

3. Application Scenarios

• Bridge Engineering: Prestressed ducts for large-span beams and box girders.
• Building Structures: Prestressed slabs or beams in high-rise buildings, stadiums, etc.
• Others: Special structures such as nuclear power plants and large storage tanks.

4. Technical Parameter Reference

• Diameter: Commonly 50-120mm (selected based on prestressing tendon specifications).
• Wall Thickness: Typically 0.25-0.4mm (after galvanization).
• Standards: Complies with national standards such as GB/T 19687 and JT/T 529.