1. The Anatomy of Concertina Razor Wire
Concertina coil is a barrier composed of high-tensile core wire and a cold-rolled steel strip featuring sharp, symmetrical barbs. Unlike traditional barbed wire, the helical "accordion" structure provides a three-dimensional obstacle that is extremely difficult to traverse or neutralize with hand tools. Pauleen employs a continuous manufacturing process ensuring consistent coil pitch and uniform blade sharpness across all batch sizes.
2. Model Spotlight: BTO-22 (Barbed Tape Obstacle - 22 Inch)
The BTO-22 is the international standard for high-security perimeters. The "22" designation refers to the nominal coil diameter of 22 inches (approx. 550mm) . This model is favored for its balance between material economy and robust barrier density.
Technical Specifications of Pauleen BTO-22:
Coil Diameter: 550mm (22") ± 10mm tolerance.
Coil Loops: Standard 33 loops per coil (customizable upon request).
Coverage Length: Approximately 10-12 linear meters per coil (depending on stretch ratio and installation tension).
Blade Profile: BTO Type (Barbed Tape Obstacle) with symmetrical barbs.
Blade Dimensions: 0.5mm nominal thickness, 21mm width, 15mm barb length.
Core Wire: High-carbon spring steel wire, diameter 2.5mm ± 0.05mm.
Tensile Strength: Core wire 1,600 - 1,800 N/mm².
Weight: Approx. 10-12 kg per coil (based on galvanized finish).
Pauleen Performance Edge:
The BTO-22 manufactured by Pauleen undergoes a specialized thermal stress-relief process. This prevents the coil from "springing back" or sagging during long-term deployment. Our proprietary stamping die ensures that the barbs possess a micro-serrated edge rather than a simple sharp cut, significantly increasing snagging potential against clothing and soft tissue.
3. Model Spotlight: CBT-65 (Concertina Barbed Tape - 65 cm)
The CBT-65 is a larger diameter variant designed for rapid deployment and layered perimeter reinforcement. The "65" denotes a 65 cm (approx. 25.6 inch) coil diameter. This model is often deployed in front of main fences to create a "stand-off" distance, or stacked in multiple rows to create a formidable wall.
Technical Specifications of Pauleen CBT-65:
Coil Diameter: 650mm (65cm).
Coil Loops: Standard 33 or 56 loops per coil (customizable to meet FEMA or MIL-spec requirements).
Coverage Length: 12-15 linear meters per coil (due to larger circumference).
Blade Profile: CBT Type (often featuring a slightly wider pitch between barbs to accommodate the larger coil radius).
Blade Width: 22mm.
Core Wire: Galvanized spring steel, 2.7mm diameter for enhanced rigidity against wind shear.
Barb Configuration: 4-point double-edge barbs per link.
Application Specifics:
While BTO-22 is the standard for fence-top outriggers, the CBT-65 is the preferred choice for ground deployment. Its wider footprint makes it stable on uneven terrain (desert sand, rocky soil) and more resistant to being crushed by vehicles. Pauleen CBT-65 coils are frequently specified for military forward operating bases (FOBs) and UN peacekeeping encampments due to their rapid retrievability and reusability.
4. Material Science & Anti-Corrosion Technology
Pauleen offers both models in three distinct metallurgical finishes to match environmental conditions:
| Finish Type | Coating Weight / Grade | Service Life Expectancy | Recommended Environment |
|---|---|---|---|
| Electro Galvanized | Min 12 g/m² Zinc | 5-7 Years | Low humidity, inland fencing, temporary sites. |
| Hot-Dipped Galvanized | Min 275 g/m² Zinc (ASTM A123) | 15-20 Years | Coastal areas, high salinity, humid tropics. |
| SS304 / SS316 | Austenitic Stainless Steel | 30+ Years | Petrochemical plants, chemical storage, extreme marine. |
Note: Pauleen strongly advises against electro-galvanized finishes for CBT-65 ground coils exposed to soil moisture; hot-dipped is the minimum standard for that application.
5. Comparative Analysis: BTO-22 vs. CBT-65
| Feature | BTO-22 (22") | CBT-65 (65cm) |
|---|---|---|
| Primary Use | Fence-top augmentation | Ground barrier / Mobile deployment |
| Stability | Requires wire tie to fence support | Free-standing on ground |
| Climbing Deterrence | High (overhead threat) | Very High (sprawling, unstable footing) |
| Installation Speed | Moderate (requires bracket mounting) | Fast (pulled from pallet and staked) |
| Pauleen SKU Code | PW-BTO22-HDG | PW-CBT65-HDG |
6. Packaging & Logistics: Factory to Site
As a factory-direct manufacturer, Pauleen understands that secondary damage during shipping compromises the coil's memory and performance. We utilize the following packaging standards for both BTO-22 and CBT-65:
Compression: Coils are compressed to approximately 1/5th of their free height to maximize container loading (approx. 500-600 coils per 20ft container).
Protection: Each coil is individually wrapped in UV-stabilized stretch film and then palletized with steel banding.
Custom Marking: Pallets are clearly labeled with Pauleen, Model Number, Finish Type, and Batch Number for ISO 9001 traceability.
7. Conclusion & Procurement
Selecting between BTO-22 and CBT-65 is a matter of tactical application. The BTO-22 provides a clean, vertical deterrent line; the CBT-65 provides a brutal, ground-level sprawl.
At Pauleen, we do not merely roll steel-we engineer denial. With our factory-direct model, we offer competitive volume pricing, consistent supply chain reliability, and technical advisory for complex perimeter design.
To request a technical data sheet (TDS), inquire about MIL-spec testing certificates, or to arrange a factory visit (virtual or in-person), please contact our sales team via our independent website.
Secure Your Perimeter with Pauleen Precision.