Product Introduction
POLYGON Tunnel Duct (PE Fresh Air Shield Pipe) represents a breakthrough in underground ventilation technology, specifically engineered for pressurized environments where traditional ducts face limitations. Tunnel Duct ranges from132x52 to 163x68 specifications.
Product Description
Tunnel Duct features a unique shield structure that provides superior pressure resistance while reducing floor height requirements. Manufactured through high-density PE-HD extrusion molding, it eliminates the need for toxic adhesive bonding required in traditional PVC systems. The double-wall hollow structure ensures excellent noise reduction and thermal insulation, while the corrugated design maintains flexibility for easy bending around structural obstacles. The quick plug-in connection system enables seamless assembly without specialized tools, and the smooth interior wall minimizes air resistance for efficient long-distance airflow.
Product Information
Material: High-density HDPE with anti-mold and anti-static additives
Certifications: ISO management system certification, CNAS laboratory tested
Production Technology: Automated shield tunnel pipe production line (China's exclusive)
Patents: Multiple utility patents for shield structure and connection system
Compression Resistance: Up to 7kN/m² compression strength
Product Specification
| Model | Outer Diameter | Inner Diameter |
| 132×52(20m×2) | 132×50 | 122×41 |
Quality Control Process
POLYGON implements a rigorous 3 quality assurance system
Raw Material Validation:
Screening for density consistency, additive dispersion, and environmental compliance
In-Process Monitoring:
Real-time extrusion thickness control, joint integrity verification, and dimensional accuracy checks
Finished Product Testing:
Compression resistance validation, airflow performance testing in CNAS laboratory, and leak-proof certification
Performance Advantages
Underground Superiority: Tunnel duct Unique shield structure withstands ground pressure while maintaining minimal height profile; compression resistance is up to 7kN/m2 with compression strength.
Environmental Safety: Glue-free connection system eliminates VOC emissions and chemical hazards
Dual Protection: Anti-mold and anti-static properties prevent secondary pollution in both humid and dry conditions
Acoustic Performance: Double-wall structure reduces noise transmission compared to conventional ducts
Installation Efficiency: Quick-plug system reduces installation time by 40% compared to traditional methods
Maintenance Friendly: Smooth interior surface prevents dust accumulation and allows easy cleaning
Applicable Scenarios
Underground HVAC Systems: Subway tunnels, basement ventilation, and underground parking facilities
Pressurized Environments: Shield tunnel projects, underground commercial spaces, and submerged applications
High-Moisture Areas: Swimming pool ventilation, basement dehumidification systems, and underground laboratories
Space-Constrained Installations: Low-ceiling environments, retrofitting projects, and architectural preservation sites
Large-Scale Distribution: Municipal ventilation projects, industrial air handling systems, and commercial complex ventilation
Hot Tags: tunnel duct, China tunnel duct manufacturers, suppliers, factory, flexible ventilation pipe, hvac flex duct, plastic hvac duct, pvc hvac duct, solid vent pipe, ventilation duct pipe
