In the modern era of heavy industry and urban infrastructure, Open Steel Grating has transitioned from a basic structural component to a high-precision engineering solution. As a leading manufacturer, Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) stands at the forefront of this evolution, merging 30 years of metallurgical expertise with AI-driven manufacturing optimizations.
NJMM operates 12 automated pressure welding lines across 45,000 square meters. Our robotics-led production ensures that every weld point on our bar gratings meets the rigorous ISO9001:2015 standards, producing over 50,000 metric tons annually.
Located in the heart of China’s industrial hub, we leverage localized raw material access and world-class logistics. This allows us to offer Information Gain through cost-transparent pricing and rapid delivery cycles to Europe, the Americas, and Southeast Asia.
Our authority is backed by CE, GHOST, and ISO certifications. We didn't just follow the rules; NJMM participated in drafting the 2019 YB/T4001 steel grating standards, cementing our role as industry leaders.
Recognized as a "Green Factory" in 2021, our hot-dip galvanizing process minimizes environmental impact while maximizing the life cycle of the product, often exceeding 30 years of service in corrosive offshore environments.
The global shift toward High-Quality Open Steel Grating sourcing from China is driven by more than just cost. It is about the "Cluster Effect" of technology, skill, and infrastructure.
Our JG255/30/100 series provides essential ventilation and explosion-proof performance for high-risk oil and gas platforms. The open design prevents the accumulation of hazardous gasses and liquids.
Designed to withstand extreme salinity, our heavy-duty gratings (JG705/30/100) are the preferred choice for shipyards and offshore drilling rigs where corrosion resistance is paramount.
From ceiling panels to trench covers in smart cities, NJMM’s aesthetic yet functional steel grating offers a modern industrial look with superior drainage and anti-slip properties.
Purchasing managers today prioritize Reliability (R) and Information Gain (IG). To optimize your procurement cycle, consider the following trends:
The industry is moving toward providing gratings as digital assets. NJMM offers detailed CAD and 3D drawings that integrate directly into your Building Information Modeling (BIM) workflows, reducing on-site installation errors to nearly zero.
Sustainable engineering demands materials that provide maximum strength with minimum steel consumption. Our forge-welded technology ensures the bearing bar and cross bar are fused into a single structural unit, offering a higher strength-to-weight ratio than traditional manual welding.
For wet and oily environments, serrated steel grating is no longer optional. Our research into "Micro-Serration" technology provides enhanced grip without compromising the structural integrity of the bars.
Founded in 1993, Ningbo Jiulong Machinery Manufacturing Co., Ltd is a modern comprehensive enterprise integrating scientific research, design, and precision manufacturing. With two massive production bases in East and North China, we have become the "Leader in Steel Grating Market."
Our vision is to be the preferred supplier and a good corporate citizen. We have invested heavily in 6 sets of automatic banding robots and 2 sets of irregular grating fabrication platforms to ensure we can meet any architectural challenge.
Jiulong
