Luzhongbao ductile iron manhole cover and frame system is a high-performance protective solution specifically designed for modern urban infrastructure. Precision-cast from QT500-7 high-strength ductile iron, it strictly complies with GB/T 23858 national standards and EN124 international standards. Through precision-matching design between the cover and frame, the system forms a complete load-transfer mechanism that effectively disperses vehicle impact forces to the road base, ensuring reliable protective performance in various road environments. The product series includes multiple specifications such as round and square shapes, with sizes ranging from 300mm to 900mm, meeting load-bearing requirements from sidewalks to port terminals. It provides comprehensive manhole protection solutions for municipal engineering, transportation, industrial parks, and other fields.
The frame adopts reinforced rib structure and wide-flange design, significantly enhancing system stability and anti-settlement capability. The cover surface features anti-slip patterns and multiple surface treatment processes, ensuring traffic safety while providing excellent corrosion resistance. With advanced production processes and strict quality control, Luzhongbao ensures that each cover and frame system achieves long service life and stable protective performance, making it an indispensable guardian for urban underground pipeline networks.
