XQV Plastic Corrugated Duct – HDPE Duct for Post‑Tensioning Systems
Lightweight, Corrosion‑Resistant & Low Friction Duct for Prestressed Concrete
The XQV plastic corrugated duct can be divided into flat duct and circular duct, and is used in post‑tensioned prestressed concrete structures as a hole‑forming duct for prestressing tendons. Made from HDPE or PP, it offers excellent corrosion resistance, good physical performance, non‑conductivity (preventing stray current corrosion), and superior sealing. It does not rust, remains stable under load, and features high strength, large rigidity, and good impact resistance – not afraid of stepping or pressing. The smooth inner wall reduces friction loss during tensioning, improving prestressing efficiency.
Circular ducts are designed to meet prestressed tendon tensioning mechanics. With uniform stiffness, the compressive strength ≥80 MPa (for 100 mm diameter), they withstand concrete pouring vibration without deformation or grout leakage. The lightweight design (e.g., φ70 mm pipe weighs only 0.8 kg/m, about 1/4 of metal pipe weight) makes handling and hoisting easy. Flexible connections (hot‑melt socket or butt welding) pass 0.02 MPa water test leak‑free, and plastic fittings (joints, tees) install 50% faster than metal equivalents.
🛡️ Excellent Corrosion Resistance
HDPE/PP material withstands aggressive environments, improving prestressing bar corrosion protection.
⚡ Low Friction Loss
Smooth inner wall reduces prestress friction loss, enhancing tensioning efficiency.
💪 High Strength & Rigidity
Uniform stiffness, compressive strength ≥80 MPa, resists construction load and concrete pressure.
🔌 Non‑Conductive
Prevents stray current corrosion, ideal for electrical railway or industrial environments.
⚖️ Lightweight & Fast Installation
Only 1/4 the weight of metal ducts; hot‑melt connections save 50% installation time.
| Inner Diameter (mm) | Outer Diameter (mm) | Wall Thickness (mm) | Supporting Anchor Model |
|---|---|---|---|
| Φ50 | Φ62 | 2.5 | M15‑2‑3 |
| Φ55 | Φ67 | 2.5 | M15‑4‑5 |
| Φ70 | Φ82 | 2.5 | M15‑6‑7 |
| Φ80 | Φ95 | 3 | M15‑8‑10 |
| Φ90 | Φ106 | 3 | M15‑11‑17 |
| Φ100 | Φ117 | 3 | M15‑18‑19 |
| Φ120 | Φ137 | 3.5 | M15‑20‑24 |
| Φ130 | Φ148 | 3.5 | M15‑25‑27 |
| Long Axis (mm) | Short Axis (mm) | Wall Thickness (mm) | Supporting Anchor Model |
|---|---|---|---|
| 50 | 22 | 2.5 | BJM15‑2 |
| 60 | 22 | 2.5 | BJM15‑3 |
| 70 | 22 | 2.5 | BJM15‑4 |
| 90 | 22 | 2.5 | BJM15‑5 |
| Component | Material | Surface Treatment | Packaging | Standard |
|---|---|---|---|---|
| Corrugated Duct | HDPE / PP | — | Cardboard box or wooden case | GB/T14370‑2015, JT/T329‑2010, TB/T3193, ISO, CE, ASTM, BS |
| Coupler | HDPE / PP | — |
With corrosion resistance and flexibility as its core advantages, the XQV plastic corrugated duct is especially suitable for harsh environments (e.g., coastal areas, chemical zones) or complex curved tendon layouts. It is an optimal solution for improving durability in modern prestressing engineering. Typical applications include:
- Bridges & Highways: Post‑tensioning ducts in box girders, segmental bridges, and cable‑stayed bridges.
- Railway Prestressed Beams: Durable duct for high‑speed rail sleepers and track slabs.
- High‑Rise Buildings: Post‑tensioned slabs and transfer plates.
- Corrosive Environments: Marine structures, chemical plants, tunnels, and foundations where metal ducts would corrode.
- Complex Curved Tendons: Flexible material adapts easily to curved alignment, reducing friction losses.
※ Parameters for reference only. Custom sizes available upon request. Final interpretation right belongs to our company.
Workshop
Our Manufacturing Base – Liuzhou Xuanqiao Prestressed Machinery Co., Ltd.</p >
Located in Liuzhou, Guangxi – a key industrial hub for prestressed technology – our modern workshop covers over 10,000㎡. We operate CNC machining centers, automated assembly lines, and precision testing equipment to ensure consistent quality.</p >
Every batch of raw material is inspected, and finished products (anchors, jacks, pumps, ducts) are tested in our in‑house laboratory for mechanical performance and pressure resistance. We are certified under ISO 9001:2015 and comply with FIP international standards.</p >
Annual capacity: 6 million anchor holes and 1,000+ sets of hydraulic equipment. Our experienced technicians and engineers follow strict SOPs to guarantee reliability.</p >
We maintain sufficient raw material inventory and finished goods for fast delivery. Continuous investment in equipment and training keeps us at the forefront of prestressed manufacturing – because a strong factory means reliable products and long‑term trust.</p >
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