Prestressed Corrugated Metal Ducts (PCMD): The Ultimate Solution for Modern Construction
Application Scenarios
Prestressed Corrugated Metal Ducts (PCMD) are essential in post-tensioning systems for bridges, high-rise buildings, parking structures, and nuclear containment vessels. These high-performance conduits, sometimes called PT Ducts, provide superior protection for tensioning tendons in concrete structures.
Technical Parameters
- Material: Galvanized steel (standard) or stainless steel (premium)
- Diameter range: 50mm to 300mm
- Corrugation depth: 1.5-3.0mm
- Wall thickness: 0.3-1.2mm
- Working pressure: Up to 2.5MPa
- Temperature range: -40°C to +120°C
Key Features
- Corrosion resistance: Hot-dip galvanized coating (minimum 100μm)
- Flexibility: 180° bending capability without kinking
- Durability: 50+ year service life in most environments
- Friction reduction: Optimized corrugation pattern reduces tendon friction by 30% compared to smooth ducts
Certifications & Standards
- ISO 9001:2015 certified manufacturing
- Complies with EN 523/524, ASTM A416, and GB/T 5224 standards
- Third-party tested by TÜV SÜD and Lloyd’s Register
Project Case Studies
- Hong Kong-Zhuhai-Macao Bridge: Used 12km of 200mm PCMD in the main span
- Shanghai Tower: Implemented 8,000+ meters of stainless steel PCMD for seismic protection
Installation & Replacement
Prestressed Corrugated Metal Ducts are installed before concrete pouring using specialized spacers. Replacement requires concrete cutting and should only be performed by certified technicians.
Maintenance Guidelines
- Annual visual inspections for corrosion
- Magnetic particle testing every 5 years
- Grout void detection using ultrasonic testing
Critical Considerations
- Always use compatible grout materials
- Maintain minimum 50mm concrete cover
- Avoid welding near installed PCMD
Engineering Insights
From our 20 years of field experience:
- Stainless steel PCMD performs better in marine environments
- Proper grout filling prevents 90% of maintenance issues
FAQ Section
Q: Can PCMD be used in curved applications? A: Yes, our corrugated design allows for smooth curvature up to R=3m.
Q: What’s the lead time for custom sizes? A: Typically 4-6 weeks for non-standard diameters.
Current Promotions
- 15% discount on orders over 5,000 meters (valid until 2025-12-31)
- Free technical training with purchases exceeding 10,000 meters
Prestressed Corrugated Metal Ducts remain the industry gold standard for durable, high-performance post-tensioning systems. Contact our engineering team today for project-specific solutions.
