Contact me to order Φ90 white corrugated pipe for precast beams

Prestressed plastic corrugated duct is a high-performance波紋管 used in post-tensioned prestressed concrete structures, typically made from high-density polyethylene (HDPE) or polypropylene (PP) with a bamboo-joint-like raised surface pattern. Its core features include:

1. Product Characteristics

• High corrosion resistance: Plastic material resists acids, alkalis, and rust, suitable for humid or corrosive environments.
• Low friction coefficient: Smooth inner wall reduces friction loss during prestressing tendon tensioning.
• Excellent flexibility: Can be bent into various curves to adapt to complex structural construction.
• Strong compressive strength: Bamboo-joint design enhances ring stiffness Contact me to order Φ90 white corrugated pipe for precast beams, resisting impact during concrete pouring.
• Superior sealing: Prevents grout leakage, ensuring dense duct grouting.

2. Application Scenarios

• Bridge engineering (box girders, T-beams, etc.)
• Building structures (long-span slabs, stadiums, etc.)
• Municipal engineering (underground utility tunnels, viaducts, etc.)

3. Common Specifications

• Diameter: Φ40mm, Φ50mm, Φ60mm, Φ80mm, etc. Contact me to order Φ90 white corrugated pipe for precast beams (selected based on prestressing tendon specifications).
• Length: Typically 6m per piece, customizable.
• Color: Black, blue, etc. (some manufacturers provide color codes to distinguish models).

II. Construction Process

1. Pre-construction Preparation

• Material inspection: Ensure pipes are undamaged, undeformed, with intact bamboo-joint structure.
• Layout and marking: Mark prestressing tendon alignment according to design drawings, fix support rebar spacing Contact me to order Φ90 white corrugated pipe for precast beams (recommended ≤1m).

2. Installation Key Points

• Fixing methods:
  • Use binding wires or dedicated clips to secure the corrugated duct to support rebars, ensuring smoothness without local bending.
  • Use specialized sleeves or heat fusion for connections, sealed with tape to prevent grout leakage.
• Precautions:
  • Avoid high temperatures from direct welding that may damage the pipe.
  • Bending radius must comply with standards (generally ≥3m) to prevent sharp angles.

3. Concrete Pouring

• Avoid vibrating directly against the corrugated duct to prevent displacement or damage.
• Check duct暢通 after pouring (e.g., using a duct detector).

4. Prestressing Tensioning and Grouting

• Before tensioning: Clear debris from the duct, insert strands or rebars.
• Grouting requirements:
  • Use specialized grouting materials with water-cement ratio ≤0.4.
  • Inject from the low end, vent from the high end, ensuring full grouting.

III. Precautions

1. Storage: Avoid direct sunlight, keep away from fire sources, store flat to prevent deformation.
2. Quality acceptance: Test ring stiffness, sealing, etc., according to《GB/T 19685-2017》standards.
3. Environmental friendliness: Some products are recyclable, meeting green construction requirements.