Technical Specifications

Materials and Surface Treatments

The core wire is produced from high‑carbon steel rod, drawn to the required diameter and then annealed to achieve the desired balance of ductility and strength. Two primary surface protections are offered: hot‑dip galvanization (Zn coating ≥ 275 g/m²) for corrosion resistance in outdoor environments, and a PVC over‑coat (thickness 0.3 mm – 0.5 mm) for added UV stability and color coding (green, blue, or black). Both treatments comply with ISO 1461 for galvanizing and ISO 10380 for PVC coating.

For specialized environments such as marine or industrial chemical zones, optional alloy coatings (e.g., Zn‑Al‑Mg) or stainless‑steel cores (grade 304) can be supplied, though these affect cost and lead time. The selection of coating is based on expected service life, maintenance intervals, and local regulatory requirements.

Typical Applications

• Perimeter security for warehouses, factories, and storage yards where a high‑tensile barrier deters climbing and cutting.
• Livestock enclosures requiring a robust fence that resists animal pressure while preventing injury to stock due to the uniform barb geometry.
• Temporary construction site perimeters, where rapid deployment and re‑tensioning are essential; the double‑strand design allows easier handling with standard fence‑stretching tools.
• Agricultural field boundaries where the wire must withstand exposure to fertilizers, pesticides, and varying moisture levels without rapid degradation.

Quality Control Philosophy

Each production batch undergoes inline diameter monitoring with laser micrometers (±0.01 mm tolerance) and tensile testing of random samples according to ASTM A370. Barb formation is inspected via high‑speed cameras to verify spacing uniformity and tip sharpness; any deviation beyond ±5 mm triggers automatic line stop. Coating thickness is measured using magnetic induction probes for galvanized layers and ultrasonic gauges for PVC, ensuring compliance with the specified minimum values before winding.

Finished rolls are subjected to a 48‑hour salt‑spray fog test (ASTM B117) for galvanized variants and a 200‑hour UV exposure test (ASTM G154) for PVC‑coated wire. Results are documented and made available to customers upon request, providing traceable evidence of corrosion resistance and service life expectations.

Customization Options

Customers may specify core wire diameter, barb length, barb spacing, roll length, and coating type in a single order. For projects requiring non‑standard dimensions (e.g., 3 mm core with 25 mm barbs), a minimum order quantity of 5 t applies, and tooling lead time is typically 2‑3 weeks. Custom printing or embossing of company logos on the PVC sheath is also available for branding purposes.

• Diameter: 1.8 mm – 3.0 mm (steps of 0.1 mm)
• Barb length: 10 mm – 30 mm
• Barb spacing: 50 mm – 150 mm
• Coating: Hot‑dip Zn, Zn‑Al‑Mg, PVC (various colors), or stainless steel core

Packaging and Shipping

Rolls are wound on sturdy wooden or plastic cores (diameter 150 mm) and wrapped in UV‑stabilized polyethylene film to protect against moisture during transit. Each pallet holds up to 20 rolls (depending on roll length) and is secured with steel strapping and corner protectors. For LCL shipments, rolls are placed in sturdy cardboard boxes with foam edge guards; for FCL, pallets are directly loaded into 20‑ft or 40‑ft containers.

Export documentation includes a commercial invoice, packing list, certificate of origin, and, upon request, a material test report (MTR) showing tensile strength, elongation, and coating adhesion. Standard Incoterms offered are FOB Ningbo or CIF destination port.

Lead Time and Sampling

Standard specifications (2.2 mm core, 15 mm barb, 90 mm spacing, galvanized, 100 m roll) are ex‑stock with a lead time of 3‑5 working days after receipt of purchase order. Custom configurations require 10‑15 working days for production plus 3‑5 days for quality verification. Samples (up to 5 m) can be dispatched via express courier at the customer’s expense, with sample preparation taking 1‑2 working days.

Frequently Asked Questions

• Can the barb spacing be adjusted after production? No, barb spacing is set during the twisting process; any change requires re‑manufacturing the wire.
• What information is needed for a quotation? Required details include wire diameter, barb length, barb spacing, coating type, roll length, quantity, and delivery destination.
• Are there any minimum order quantities for custom sizes? Yes, custom diameters or barb geometries typically require a minimum of 5 tons; standard sizes have no MOQ.
• How is the wire tensioned during installation? The double‑strand construction allows use of standard fence‑stretching tools; tension should be applied gradually to avoid over‑stressing the barbs.

For technical datasheets, sample requests, or to discuss a custom specification, please contact our sales engineering team.