Description
Product Introduction
XiCheng EP is a leading manufacturer and supplier of high-performance round polypropylene plastic ducts, specifically engineered for industrial exhaust gas treatment and laboratory ventilation systems. Our PP ducts are extruded from 100% virgin copolymer grade polypropylene resin, delivering exceptional chemical resistance, durability, and airflow efficiency in the most demanding corrosive environments.
Unlike traditional metal ducts that corrode rapidly when exposed to acids, alkalis, and chemical fumes, our round PP ducts maintain structural integrity for over 50 years under rated operating conditions. They are fully compatible with our complete range of PP pipe fittings including PP 45°/90° elbows, PP tees and PP butterfly valves, creating a seamless, leak-proof ventilation system.
Core Performance Advantages
Our round polypropylene ducts outperform alternative materials (steel, PVC, FRP) in every critical metric:
- Industry-Leading Chemical Resistance: Withstands corrosion from over 150 common chemicals, including high-concentration acids (pH 1) and strong alkalis (pH 14). Ideal for use in chemical plant exhaust systems paired with our PP wet scrubbers.
- Extended Service Life: Rated for 50+ years of continuous operation at temperatures up to 95℃ and pressures up to 0.6MPa. UV-stabilized options available for outdoor installations.
- Superior Mechanical Strength: Reinforced with glass fiber additives for enhanced rigidity, preventing deformation under high airflow loads and thermal stress.
- Energy-Efficient Design: Smooth, seamless inner surface reduces airflow resistance by up to 30% compared to corrugated metal ducts, lowering centrifugal fan energy consumption.
- Excellent Thermal Insulation: Thermal conductivity is only 1/200 that of steel pipes, eliminating condensation and reducing heat loss in temperature-controlled ventilation systems.
- Lightweight & Easy Installation: 80% lighter than steel ducts, reducing installation time and labor costs. Supports multiple connection methods including hot melt welding, socket connection and flanged connection.
- Sound Absorption Properties: Natural sound-dampening characteristics reduce system noise levels by 15-20dB compared to metal ducts.
Comprehensive Technical Specifications
| Parameter | Standard Options | Customization Available |
|---|---|---|
| Outer Diameter | φ20mm, φ50mm, φ63mm, φ75mm, φ90mm, φ110mm, φ160mm, φ200mm, φ250mm, φ315mm, φ400mm, φ500mm | φ500mm to φ1200mm |
| Standard Length | 3000mm, 4000mm | 1000mm to 6000mm |
| Wall Thickness | SN4 (standard), SN8 (heavy duty) | Custom thicknesses |
| Material | 100% Virgin Copolymer Polypropylene (PP) | PP-FRP composite, UV-resistant PP, food-grade PP |
| Connection Methods | Hot melt welding, socket connection, flanged connection | Custom connection types |
| Standard Colors | Gray, Beige | Any RAL color |
| Operating Temperature | -10℃ to 95℃ | Special grades for -20℃ to 110℃ |
| Pressure Rating | 0.6MPa (standard) | Up to 1.0MPa (heavy duty) |
| Certifications | CE, RoHS, ISO 9001 | FDA food grade, UL 94 V-0 flame retardant |
| MOQ | 1 piece | – |
| Delivery Time | 3-5 days (stock), 7-14 days (custom) | Expedited shipping available |
Manufacturing Process & Quality Control
Every XiCheng round PP duct undergoes a rigorous 6-step manufacturing process to ensure consistent quality:
- Raw Material Testing: All incoming PP resin is tested for melt flow rate, chemical composition and impact strength to meet our strict specifications.
- Precision Extrusion: Using computer-controlled single-screw extruders with temperature accuracy of ±1℃, we produce ducts with uniform wall thickness and perfect roundness.
- Cooling & Sizing: Precision water cooling system ensures dimensional stability and prevents warping during production.
- Visual & Dimensional Inspection: Each duct is inspected for surface defects, wall thickness variation and diameter accuracy.
- Pressure Testing: Random samples from each batch undergo hydrostatic pressure testing at 1.5 times the rated pressure for 24 hours.
- Packaging & Labeling: Ducts are wrapped in protective film and labeled with product specifications, batch number and production date for full traceability.
View our workshop and production facilities to see our manufacturing process in action.
Step-by-Step Installation Guide
Hot Melt Welding (Recommended for Permanent Connections)
- Cut the duct to the required length using a fine-tooth saw, ensuring a clean, square cut.
- Remove all burrs and sharp edges from the duct ends.
- Set the hot melt welding machine to 260℃ and allow it to reach operating temperature.
- Simultaneously heat both duct ends for the recommended time (varies by diameter).
- Remove the ducts from the heater and immediately push them together with firm, even pressure.
- Hold the joint in place until it cools completely (1-3 minutes depending on size).
- Inspect the weld bead for uniformity and absence of defects.
Flanged Connection (For Removable Sections)
- Weld PP flanges to both duct ends using hot melt welding.
- Insert a PP gasket between the two flanges to ensure a tight seal.
- Align the bolt holes and tighten the bolts evenly in a crisscross pattern.
- Check for leaks by pressurizing the system to 0.3MPa.
For detailed installation instructions and video tutorials, refer to our PP Ventilation System Installation Guide.
Typical Application Scenarios
Our round polypropylene ducts are the industry standard for:
- Chemical Processing Plants: Exhaust systems for acid mist, alkaline fumes and organic solvent vapors
- Electroplating & Metal Finishing: Ventilation for plating baths, anodizing lines and etching processes
- Pharmaceutical Manufacturing: Clean room ventilation and exhaust systems for production areas
- University & Research Laboratories: Fume hood ductwork and general laboratory ventilation
- Semiconductor Manufacturing: Exhaust systems for toxic process gases and clean room air distribution
- Wastewater Treatment Plants: Ventilation for aeration tanks, sludge processing and chemical storage areas
- Food & Beverage Processing: Ventilation systems requiring corrosion resistance and hygiene compliance
Browse our project gallery to see our PP ducts installed in real-world applications.
Matching Ventilation System Components
Complete your system with our full range of compatible products:
- PP 45° & 90° Elbows for directional changes
- PP Tees & Crosses for branch connections
- PP Pipe Reducers for size transitions
- PP Manual & Electric Butterfly Valves for airflow control
- PP Flexible Connectors to absorb vibration and thermal expansion
- PP Wet Scrubbers for exhaust gas treatment
- PP Activated Carbon Adsorption Towers for odor and VOC removal
Why Choose XiCheng EP as Your PP Duct Supplier?
With 16 years of specialized experience in manufacturing anti-corrosion plastic ventilation equipment, XiCheng EP has become a trusted partner for clients in over 50 countries worldwide.
- ISO 9001 Certified Manufacturing: All products are produced in accordance with international quality standards
- Direct Factory Pricing: No middleman markup, ensuring the most competitive prices in the industry
- Large Inventory: Standard sizes are always in stock for immediate shipment
- Custom Fabrication: In-house engineering team can design and manufacture custom ducts and fittings to your specifications
- Comprehensive Warranty: All PP ducts come with a 12-month warranty against manufacturing defects
- Global Technical Support: Our engineers are available to provide installation training and on-site service worldwide
- Flexible Payment Terms: Accept T/T, L/C and other payment methods for international orders
- Agent Program: Exclusive sales channels and support available for distributors worldwide
For bulk orders, custom specifications or technical assistance, contact our sales team today for a free, no-obligation quote.
Frequently Asked Questions (FAQ)
Q: What is the difference between PP and PVC ducts?
A: PP ducts offer superior chemical resistance, higher temperature tolerance (up to 95℃ vs 60℃ for PVC) and greater impact strength. They are also more flexible and less likely to crack under thermal stress. PVC ducts are generally less expensive and suitable for less demanding applications. For a detailed comparison, read our article: PP vs PVC: Which is Better for Industrial Ventilation?
Q: Can PP ducts be used outdoors?
A: Yes, our standard PP ducts are UV-stabilized and can be used outdoors. For prolonged exposure to direct sunlight in harsh climates, we recommend our special UV-resistant PP grade or adding a protective coating.
Q: What is the maximum airflow velocity for PP ducts?
A: The recommended maximum airflow velocity for round PP ducts is 20 m/s for general ventilation and 15 m/s for systems carrying abrasive particles. Our engineering team can provide detailed airflow calculations for your specific application.
Q: Do you offer insulated PP ducts?
A: Yes, we can provide pre-insulated PP ducts with polyurethane or rock wool insulation for applications requiring temperature control or condensation prevention.
Q: What is your minimum order quantity?
A: We accept orders as small as 1 piece for standard sizes. Custom orders have a minimum quantity of 10 pieces depending on size and complexity.
Q: What are your delivery terms?
A: We offer FOB Shenzhen, CIF and EXW delivery terms. We can also handle all aspects of international shipping and customs clearance for your convenience.
