Explore our core range of high-performance galvanized stair treads and structural walkway gratings, engineered for maximum load-bearing and corrosion resistance.
Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) — Established 1993
NJMM is a modern comprehensive enterprise integrating scientific research, high-tech design, automated machinery manufacturing, and engineering construction. For over three decades, we have defined the standard for Galvanized Walkway Grating across Asia and beyond. Our facilities utilize state-of-the-art AI-integrated robotics for precision welding, ensuring every cross-bar and bearing bar is fused with structural integrity that exceeds international requirements.
Full adherence to ISO9001:2015, ISO45001, CE, and GHOST standards. Our products meet or exceed the YB/T4001-2019 national steel grating standard.
Utilizing laser cutting and digital control panel tailoring to provide high-tolerance gratings for complex offshore and petrochemical platforms.
Exporting over 20,000 tons annually to South America, Europe, Oceania, and the Middle East with localized engineering support.
The global demand for industrial flooring is shifting toward sustainability and modularity. As a leading manufacturer, NJMM is at the forefront of this transition. Our hot-dip galvanization process is now optimized for minimal environmental impact while providing superior anti-corrosion protection that lasts up to 50 years in mild environments.
Key trends we observe include the increasing use of serrated bars for enhanced anti-slip safety in oil and gas projects, and the rise of I-bar grating in the aerospace and marine sectors to reduce weight without compromising strength-to-weight ratios.
The "China Advantage" is no longer just about cost; it is about scale, speed, and sophistication. NJMM's 12 automated lines allow us to handle massive wholesale orders—such as for entire port terminals or refineries—with a lead time that is 40% faster than regional competitors. Our internal quality control lab monitors every batch for coating thickness, load capacity, and weld penetration, providing a comprehensive "MTC" (Mill Test Certificate) with every shipment.
From deep-sea platforms to urban infrastructure, our products provide the "foundation of safety."
JG325/30/100 gratings provide high ventilation and heat dissipation, critical for high-temperature refinery environments.
Corrosion-resistant heavy-duty G505/30/100 gratings withstand saline environments and high-load traffic at shipping terminals.
Aesthetic and functional ceilings, ditch covers, and ventilation screens for parking lots and sewage disposal plants.
Solving the most common challenges for global procurement managers.
In standard outdoor environments, our galvanization (minimum 610g/m²) provides 20-50 years of protection. In highly corrosive coastal zones, we recommend thicker coatings or stainless steel options.
Yes. While we follow the Chinese YB/T4001, we regularly manufacture to ASTM A123 (USA), BS4592 (UK), and AS1657 (Australia) standards based on client requirements.
Absolutely. NJMM offers full engineering services, including detailed CAD drawings, load calculations, and installation guides for complex walkway systems.
Plain grating is ideal for standard walkways. Serrated grating features a "toothed" surface on the bearing bars for superior anti-slip performance in oily or icy conditions.
Continuous innovation in steel structure manufacturing since 1993.
Jiulong