Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) was founded in 1993, is mainly engaged in the design and manufacturing of steel grating, railings, platforms and other light steel structures. It is a modern comprehensive enterprise integrating scientific research and design, machinery manufacturing and engineering construction.
We currently have 2 production bases in the East and North of China, there are 12 steel grating auto welding product lines, as well as complete auxiliary processing equipment and testing facilities, like robots welding, laser cutting, digital control panel tailoring etc. Our annual output of steel gratings and allied products, including trench covers, stair treads, stanchions, handrails, fences, is over 50,000 metric tons.
Since 1993, we have pioneered forge welding technologies, securing ISO9001, CE, and GHOST certifications.
Our municipal engineering center drives innovation in "Longta" steel grating, setting YB/T4001 industry standards.
Serving markets across South America, Europe, Oceania, and West Asia with high-performance structural steel.
The global industrial floor grating market is undergoing a significant transition toward forge welded technology. Unlike traditional manual welding, forge welding uses a combination of intense heat and hydraulic pressure to fuse crossbars and bearing bars into a single, permanent unit. This process eliminates internal stresses and provides superior load-bearing capacity.
Transitioning from manual fabrication to 12 self-developed automatic pressure welding equipment lines. This ensures micron-level precision and 100% weld consistency.
Integration of 6 sets of automatic banding robots and laser cutting systems for irregular grating fabrication, reducing human error and waste material.
Development of "Green Factory" initiatives. Focusing on eco-friendly hot-dip galvanizing techniques that exceed international environmental standards by 2030.
Tailored engineering for complex environments
Recommended: JG255/30/100, JG325/30/100.
Ventilation, lighting, and explosion-proof performance are critical for safety in volatile environments.
Recommended: G505/30/100, JG1008/30/100.
Heavy-duty loading capacity for equipment protection and ditch covers in high-impact zones.
Recommended: Stair Treads & Trench Covers.
Focus on anti-slippery serrated patterns and durability for public walkways and waterworks.
1. Superior Durability: The hot-dip galvanization finish after fabrication provides anti-corrosion protection that prolongs product life by up to 50 years in temperate climates.
2. Steel Efficiency: Under the same loading requirements, forge-welded grating uses less raw material than solid plating, reducing the dead weight of the supporting structure.
3. Low Windage: The open grid design makes it ideal for high-altitude platforms where wind resistance must be minimized to maintain structural integrity.
4. Rapid Installation: Our gratings are designed for "Plug-and-Play" installation using standard clips, requiring no on-site welding or specialized labor.
5. Self-Cleaning: The grid structure prevents the accumulation of grime, water, snow, and hazardous dust, reducing long-term maintenance costs.
6. High Strength-to-Weight Ratio: Our JG-series gratings offer unmatched load distribution, essential for heavy industrial machinery platforms.
NJMM combines 30 years of manufacturing experience with 12 automatic welding lines, producing 50,000 tons annually. Our E-E-A-T credentials include ISO9001, CE, and participation in drafting the YB/T4001 industry standard.
Forge welding uses high heat and pressure to fuse bars into a single unit, offering better resistance to vibration and impact. Press-locked grating relies on mechanical interlocking, which may loosen under extreme dynamic loads.
Yes, we utilize laser cutting and digital control panel tailoring alongside 2 sets of dedicated irregular fabrication platforms to meet complex architectural requirements.
With two major production bases in East and North China, we offer efficient production cycles and fast delivery via major ports to Europe, South America, and the Middle East.
Jiulong
