Engineered for durability and precision. Explore our flagship range of industrial gratings and stair treads.
Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM), established in 1993, has evolved into a titan of the steel grating industry. As a comprehensive enterprise integrating scientific research, design, and precision manufacturing, we specialize in high-load compound steel gratings, railings, and light steel structures. Our mission is to be the leader in the global market, serving as a preferred supplier and a responsible corporate citizen.
Currently, NJMM operates two massive production bases in East and North China, spanning 450,000 square meters. With 12 automated pressure welding lines and advanced robotics, we achieve an annual output exceeding 50,000 metric tons.
Our commitment to quality is backed by international standards:
SQM Manufacturing Area
Auto Welding Lines
Annual Tons Produced
Global Export Markets
A deep dive into supply chain resilience, global procurement trends, and the technological evolution of structural steel.
In the current global industrial landscape, the shift towards modular construction and sustainable materials has skyrocketed the demand for compound steel grating. From offshore oil rigs in the North Sea to massive logistics hubs in Southeast Asia, engineers are prioritizing materials that offer maximum strength-to-weight ratios. Compound gratings—combining the load-bearing capacity of steel with the surface stability of checkered plates—are now the industry standard for preventing small object falls while maintaining structural integrity.
NJMM’s transition to Factory 4.0 represents the cutting edge of Chinese manufacturing. By integrating robot welding, laser cutting, and digital control panel tailoring, we provide what we call "Information Gain" in production—transparent, precise, and highly efficient. This digital backbone ensures that every custom order, whether for a petrochemical plant or a municipal drainage system, meets 0.1mm tolerance levels while reducing material waste by 15%.
Procurement officers today value resilience over mere cost. NJMM’s dual-base strategy (East and North China) mitigates regional logistical risks. Our deep integration into the global logistics network allows us to provide "detailed engineering drawings" and "installation support," moving from being a mere manufacturer to a full-cycle solutions partner.
Compound steel grating is a product of high-tech symbiosis. It consists of a steel grating with a specific load-bearing capacity and a sealed surface, usually a checkered plate. This configuration is essential in environments like Refineries and Chemical Plants where liquid spillage must be controlled or where pedestrians require a solid walking surface over open structures.
Versatility across heavy industry, urban infrastructure, and specialized engineering.
Designed to withstand extreme atmospheric corrosion. Our hot-dip galvanized finishes provide 50+ years of life in saline environments.
Anti-explosion and anti-skid properties are paramount. NJMM gratings are used in refineries globally for safe platform walkways.
High-load capacity for heavy equipment protection. Recommended products: JG705/30/100, JG1008/30/100 for maximum stress handling.
1. Material Efficiency: Under the same loading requirements, steel grating uses less material, reducing the total load on supporting structures.
2. Economic Superiority: Save on labor, maintenance, and construction time. The open-grid design prevents the accumulation of snow, rain, and grime.
3. Modern Aesthetics: Neat lines and a professional finish provide a contemporary industrial look for ceilings and screens.
4. High Durability: Fabrication followed by hot-dip galvanization ensures a superior anti-corrosion barrier.
5. Safety First: Serrated profiles provide industry-leading anti-slip functionality, essential for high-altitude walkways.
6. Easy Installation: Fastened with clips or welding, no on-site complex processing required.
Compound steel grating offers a sealed surface (checkered plate) that prevents small items from falling through, provides a smoother walking surface for high-traffic areas, and maintains the massive load-bearing capacity of the underlying steel bars. It is the gold standard for industrial safety.
We utilize 12 automated pressure welding lines that ensure consistent weld integrity. Every batch undergoes rigorous testing for load capacity and galvanization thickness (ISO 1461 compliant) before shipping. We also provide full BIM/CAD drawing support for easy integration into your project.
Absolutely. We have 2 specialized irregular grating fabrication platforms and use digital tailoring to create gratings that fit perfectly around pipes, columns, and equipment, minimizing the need for on-site cutting.
Thanks to our Industry 4.0 efficiency and dual-base production, we offer some of the fastest turnaround times in the industry. Lead times vary by volume, but our annual 50,000-ton capacity ensures we can prioritize large-scale projects without bottlenecking.
Find the perfect specifications for your engineering requirements.
Jiulong
