China Durable Double Barbed Wire Wholesale Supplier
Double barbed wire consists of two low‑carbon steel strands helically twisted together, with sharp barbs formed by cutting and welding short lengths of wire onto the core at regular intervals. This
China Durable Double Barbed Wire Wholesale Supplier
Double barbed wire consists of two low‑carbon steel strands helically twisted together, with sharp barbs formed by cutting and welding short lengths of wire onto the core at regular intervals. This geometry creates two parallel barb lines that increase the likelihood of snagging and deter climbing or cutting attempts compared with single‑strand designs.
Common core wire diameters range from 2.0 mm to 3.0 mm, while barb lengths are usually between 12 mm and 18 mm. Barb pitch (distance between barbs along the strand) is often set at 75 mm, 100 mm, or 150 mm depending on the required security level. The overall diameter of the finished product, including barbs, typically falls between 4.5 mm and 6.0 mm.
The core wire is produced from low‑carbon steel (grade Q195 or equivalent) with a carbon content below 0.12 % to ensure ductility during drawing and twisting. After forming, the wire undergoes hot‑dip galvanizing, delivering a zinc coating weight of 100 g/m² to 275 g/m², which corresponds to a coating thickness of approximately 7 µm to 20 µm. For environments with higher corrosion exposure, PVC‑coated or aluminized variants are available, adding a polymer layer of 0.5 mm to 1.0 mm or an aluminum‑zinc alloy coating.
Wire drawing reduces the rod to the target diameter, followed by cleaning and annealing to relieve internal stresses. The two strands are then twisted in opposite directions at a lay length of 100 mm to 150 mm, creating a balanced torque‑free cable. Barbs are produced by cutting short lengths of wire, positioning them perpendicular to the core, and resistance‑welding each barb to both strands to ensure mechanical retention. Final inspection includes visual checks for uniform barb placement, tensile testing of a sample length, and coating adhesion tests using the knife‑knife method.
In perimeter security for industrial sites, the double barb configuration raises the effective cutting resistance because a shear force must overcome two interlocking barb points simultaneously. For livestock containment, the spacing of 75 mm to 100 mm prevents animals from pushing their heads through while still allowing visibility and airflow. High‑security facilities such as prisons or military bases often specify a 150 mm barb pitch combined with a 3.0 mm core to achieve a tensile strength exceeding 550 MPa, which delays breach attempts. The product is also used on temporary construction fencing where rapid installation and low weight (approximately 1.1 kg/m for a 2.5 mm core) are advantageous.
| Parameter | Typical Value | Unit | Remarks |
|---|---|---|---|
| Core wire diameter | 2.0 – 3.0 | mm | Standard range; custom sizes available |
| Barb length | 12 – 18 | mm | Length of each barb |
| Barb pitch | 75, 100, 150 | mm | Distance between barbs along strand |
| Tensile strength | 450 – 550 | MPa | Depends on wire grade and diameter |
| Zinc coating weight | 100 – 275 | g/m² | Hot‑dip galvanizing |
| Coating thickness | 7 – 20 | µm | Approx. equivalent to coating weight |
| Weight per meter | 0.9 – 1.3 | kg/m | For 2.0 mm to 3.0 mm core |
Customization options include adjusting the wire diameter from 1.8 mm to 3.5 mm to meet specific load requirements. Barb length and pitch are variable; common lengths range from 10 mm to 22 mm, while pitch can be set between 50 mm and 200 mm in 25 mm increments. Coating options include hot‑dip galvanizing (Zn), galvannealed (Zn‑Fe), PVC coating (various colors), and aluminum‑zinc alloy (Zn‑Al) for enhanced corrosion resistance. Lengths are supplied in standard coils of 25 kg or 50 kg, but custom spool weights and lengths are available upon request.
Frequently Asked Questions
Can the wire diameter be customized? Yes, the core wire can be drawn to any diameter between 1.8 mm and 3.5 mm; outside this range requires a special tooling review.
What information is required for a quotation? Required details include desired core diameter, barb length, barb pitch, coating type, coil weight, and delivery destination.
Which coating types are offered? Standard hot‑dip galvanizing, galvannealed (Zn‑Fe) for paint adhesion, PVC‑coated in black, green, or gray, and aluminum‑zinc alloy (Zn‑Al) for marine environments.
How is the product packaged? The wire is wound on steel or plastic spools, wrapped in stretch film, and placed on pallets with corner protectors for safe handling.
Typical production lead time is Typically 10 to 15 working days after receipt of confirmed order and deposit, depending on coating choice and order volume.
For technical inquiries or to request a quotation, please contact our sales team.