Double-layer polypropylene corrugated pipe is made of high-performance polypropylene (PP) material and is manufactured through an inner and outer double-layer co-extrusion molding process. The outer wall of the product has a spiral corrugated structure, which enhances the pressure resistance and flexibility of the pipe body; the inner wall is smooth, which improves the threading efficiency and reduces friction damage to the cable. It is widely used in industrial equipment, mechanical automation, power threading, underground communications, cable protection and other fields.
2. Product Features
✅ Double-layer structure design: the outer corrugation enhances the compression resistance, and the inner layer is smooth for easy threading
✅ Good chemical resistance: acid and alkali resistance, salt spray resistance, corrosion resistance
✅ Environmentally friendly materials: halogen-free, non-toxic, in line with RoHS environmental standards
✅ Good mechanical properties: impact resistance, wear resistance, long service life
✅ Moderate heat resistance: long-term working temperature can reach -20℃ to +100℃
✅ Light weight, high cost performance: easy to transport and install, excellent cost control
3. Applicable fields
Cable harness protection in power engineering
Cable protection system in mechanical equipment
Industrial automation, equipment wiring
Municipal underground cable and communication pipeline system
Building wall wire casing system
General indoor/outdoor electrical installation engineering
4. Product specifications (example)
Model specification Inner diameter (mm) Outer diameter (mm) Bending radius (mm) Operating temperature (℃) Packing method
PP-DW16 12.0 16.0 ≥30 -20 ~ +100 100m/roll
PP-DW20 16.5 20.0 ≥35 -20 ~ +100 100m/roll
PP-DW25 21.2 25.0 ≥40 -20 ~ +100 50m/roll
PP-DW32 26.8 32.0 ≥50 -20 ~ +100 25m/roll
PP-DW40 36.0 40.0 ≥60 -20 ~ +100 25m/roll
More specifications Support customization Support customization Support customization Upgradeable to heat-resistant flame-retardant type Customizable
V. Optional functions (customization service)
📌 Flame retardant grade upgrade (optional UL94 V-2)
📌 Color customization: black, gray, red, blue, etc.
📌 Printing service: customer name/batch/parameter identification
📌 Thickened/heavy-duty pressure-resistant version
📌 Matching connectors: straight/elbow/waterproof fixed head
VI. Summary of product advantages
✔ Double-layer structure is more pressure-resistant and more protective
✔ Smooth inner wall, smoother threading
✔ PP material is cost-effective and suitable for large-scale engineering applications
✔ Various functions can be customized to meet the needs of different industrial scenarios
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