Technical Specifications for Wire Fence Manufacturing and Installation
Section 1: General Welding Quality Standards In the production of mesh and structural components, welding must strictly adhere to current national standards to ensure mechanical integrity and corrosion resistance. 1. Classification and Evaluation of Welding Defects Standard: GB/T 6417.1-2005 (Classification of geometric imperfections in metallic materials - Fusion welding). Technical Note: Focus should be placed on preventing undercuts, burn-through, cold joints, and weld beads. Any crack-related defects are strictly prohibited as they compromise structural safety. 2. Mechanical Testing of Welded Joints Hardness Testing: Conducted per GB/T 2654-2008 to evaluate the hardness gradient across the Heat Affected Zone (HAZ) and prevent brittle failure. Impact Testing: Conducted per GB/T 2650-2022 (Charpy V-notch) to determine the toughness of welds in low-temperature environments—crucial for highway safety in cold regions. Bend Testing: Conducted per GB/T 2653-2008 to verify the ductility of the weld face and root, ensuring the wire fence absorbs energy rather than snapping upon impact. Section 2:
