Duplex URD Cable

Raw Material Test is the critical first step in manufacturing the Duplex URD Cable. Incoming AA8000 aluminum alloy rods undergo detailed chemical composition analysis to confirm precise alloy elements and purity levels. Mechanical testing verifies tensile strength, elongation, and hardness meet ASTM B800 requirements. XLPE and polyethylene compounds are rigorously tested for thermal stability, dielectric strength, UV resistance, and moisture resistance. Surface quality inspection and dimensional measurements detect any defects or variations in rod and compound materials. Metallographic examination confirms uniform grain structure. Only raw materials that fully pass every stringent criterion are approved for wire drawing, stranding, and extrusion in the production of the Duplex URD Cable.

Process Inspection during the manufacturing of the Duplex URD Cable maintains precise control at every stage. After precise wire drawing of the AA8000 alloy, continuous monitoring verifies dimensional tolerances and surface quality. The stranding and assembly process uses real-time tension control to achieve uniform duplex configuration with phase conductors and concentric neutral. XLPE insulation and polyethylene sheath extrusion are carefully controlled for thickness uniformity and strong adhesion. Online diameter measurement systems and frequent visual checks prevent defects such as uneven lay or insulation imperfections. Key process parameters, including temperature and speed are strictly logged. Mid-process sampling includes partial electrical and mechanical tests. Any deviation triggers immediate corrective action. These rigorous in-process controls safeguard the structural integrity and electrical properties of the Duplex URD Cable, delivering a high-quality underground service cable.

Finished Product testing ensures every reel of Duplex URD Cable meets the highest quality standards. Comprehensive dimensional verification confirms overall diameter, conductor alignment, insulation thickness, and sheath uniformity. DC resistance and high-voltage tests validate electrical performance. Mechanical tests measure tensile strength and elongation of the AA8000 alloy. Full visual and tactile inspections check for surface defects or sheath imperfections. All examinations follow UL 854 and ICEA standards with detailed records for full traceability. Packaging and marking accuracy are also verified. Only the Duplex URD Cable that successfully passes 100% of these final inspections receives approval for shipment. This rigorous final quality gate assures customers of outstanding conductivity, flexibility, corrosion resistance, and reliable performance in underground residential applications.