358 anti climb fence, also known as high security clear view mesh fence, is widely used for airports, prisons, power stations, railway perimeters and industrial secure zones. Named from its specification: 3 inch × 0.5 inch opening with 8-gauge steel wire (76.2mm ×12.7mm, 4.0mm wire diameter), this mesh design removes footholds to stop climbing and tampering.
Many buyers only focus on final panel price, but understanding the full 358 fence manufacturing workflow helps you judge product quality, verify factory capability and avoid substandard products. This guide walks through every production stage, from raw steel wire incoming inspection to finished panel packaging and pre-shipment QC.
Step 1 – Raw Material Selection & Incoming Inspection
The foundation of durable 358 fence starts with raw low carbon steel wire, usually Q195 grade. Before entering the production line, every coil undergoes strict inspection.
QC technicians test wire diameter, tensile strength, surface defects and metal composition. Unqualified wire with uneven thickness or surface rust will be rejected directly. For high corrosion resistance projects, factories select wire for hot dip galvanizing, while standard orders use pre-galvanized steel wire.
Key inspection items:
- Wire diameter tolerance check
- Tensile strength test
- Surface scratch and rust inspection
- Material certification verification
Step 2 – Wire Drawing, Straightening and Cutting
Qualified steel coils go through wire drawing to reach the target diameter. This process improves tensile strength, making the wire harder to cut with ordinary hand tools.
Next, automatic straightening machines eliminate bending and deformation from storage and transport. Then the straight wire is cut into fixed lengths for horizontal and vertical mesh wires. Precision cutting guarantees consistent mesh spacing, which is critical for the anti-climb performance of 358 fence.
Step 3 – Automatic Resistance Welding (Core Production Stage)
Automatic mesh welding machines are the heart of 358 fence production. Horizontal and vertical steel wires cross at fixed intervals and are resistance welded at every intersection.
The machine precisely controls welding current, pressure and time to ensure each weld point is solid. Weak welds will separate under impact or prying, which ruins the security function. After welding, the whole mesh sheet is flat, without loose wires or deformed openings.
Step 4 – Panel Trimming, Deburring and Bending
After welding, large mesh sheets are cut into custom panel sizes according to client orders. Common panel heights range from 2.2m to 3.3m, width 2.0m to 2.5m.
Workers trim edges and remove sharp burrs to prevent injury during installation. For curved 358 fence panels, hydraulic bending machines create V-bends to boost panel rigidity and anti-impact performance. This step also checks mesh opening dimensions to keep the 76.2 ×12.7mm standard.
Step 5 – Surface Preparation and Anti-Corrosion Treatment
This stage decides outdoor service life. Two mainstream processes:
- Hot dip galvanizing: Panels are immersed in molten zinc at around 450°C. A metallurgical zinc layer bonds with steel, offering long term rust protection. Zinc coating thickness is measured to meet ISO 1461 standards.
- Pre-galvanized wire + powder coating: Welded mesh is cleaned to remove grease and dust, then electrostatic powder spraying is applied. Polyester powder coating provides UV resistance and custom RAL colors, such as RAL6005 green and RAL9005 black.
High-end projects adopt double protection: hot dip galvanizing first, then powder coating, for coastal and high humidity environments.
Step 6 – Finished Product Quality Control Testing
After surface treatment, every batch enters final QC inspection.
- Mesh size and wire diameter measurement with calipers
- Weld strength pull test
- Coating thickness and adhesion test
- Visual check for pinholes, uneven coating and deformation
- Impact resistance sampling test
Panels failing any test will be reworked or scrapped before packing.
Step 7 – Cleaning, Labeling and Packaging for Shipment
Qualified 358 fence panels are cleaned and dried. Each panel gets a product label with batch number, specification and production date.
Panels are wrapped with protective plastic film and stacked firmly on wooden pallets. Stretch film secures the whole pallet to avoid scratching during sea or land transport. Custom marking for container loading is available for bulk orders.
Why Production Process Matters for 358 High Security Fence
Poor manufacturing leads to safety risks. If wire diameter is reduced, weld points are weak or coating is thin, the fence can be climbed, cut or rust quickly. Professional factories maintain QC at every checkpoint to guarantee the anti-climb and anti-tamper function required for high security sites.
FAQ
Q1: What is the standard wire diameter for 358 fence?
A1: The classic 358 fence uses 4.0mm (8 gauge) steel wire. 3.2mm wire is available for low-security projects, while thicker wire can be customized for extra high security demands.
Q2: What surface treatment lasts the longest?
A2: Hot dip galvanized plus polyester powder coating offers the longest service life, up to 20-30 years outdoors. It works well in coastal salt spray and chemical plant environments.
Q3: Can 358 fence panels be customized in size and color?
A3: Yes. Factories can adjust panel height, width and choose any RAL color. Custom V-bend panels and matching security posts, gates and brackets are available.
Q4: What quality certificates can 358 fence obtain?
A4: ISO 9001, CE, SGS and BV test reports are available for most high security 358 fence batches.
Conclusion
The full 358 anti climb fence manufacturing process is a tightly controlled multi-stage workflow. From raw material inspection, automatic welding, anti-corrosion treatment to final QC and packaging, every step directly affects security performance and service life. When sourcing 358 fence, ask your supplier for production process records and test reports to confirm product quality before order confirmation.