◎ Tri-colored sub-ducts offer advantages such as light weight, high strength, impact resistance, corrosion resistance, and cost-effectiveness;
◎ The smooth inner wall and low friction coefficient facilitate easy cable pulling and ensure high construction efficiency;
◎ They feature excellent electrical insulation properties and a long service life (50 years for buried applications), ensuring durable, safe, and reliable line operation;
◎ Available in coiled form, allowing for long continuous sections, fewer joints, and simplified installation;
◎ Can be manufactured in various colors for easy identification;
◎ Uniform coloration; sub-ducts typically come in red, green, and white, though other colors can be specified by mutual agreement between supplier and buyer;
◎ Appearance: The duct walls are free from bubbles, cracks, discoloration streaks, or visible impurities, with smooth inner and outer surfaces that facilitate installation;
◎ Superior physical and mechanical properties ensure a h