Explore our high-performance manufacturing lineup engineered for ultimate drainage efficiency and superior structural durability.
Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) was founded in 1993, emerging as a premier global leader engaged in the specialized design and manufacturing of steel grating, heavy-duty stormwater grates, stair treads, railings, platforms, and complex light steel structures. As a modern comprehensive enterprise integrating advanced scientific research, precision machinery manufacturing, and large-scale engineering construction, NJMM sets the industry benchmark for quality and reliability.
Operating out of two major production bases strategically situated in the East and North of China, NJMM commands an impressive manufacturing infrastructure. We house 12 state-of-the-art steel grating automated pressure-welding production lines, complemented by high-precision auxiliary processing and rigorous testing facilities—including robotic welding arms, high-powered fiber laser cutting systems, and digital control panel tailoring machines. Our massive annual output capacity exceeding 50,000 metric tons guarantees seamless supply chain execution for global procurement projects.
Beyond manufacturing excellence, NJMM delivers comprehensive engineering services and technical support. From bespoke stormwater drainage planning and structural load calculation to precision installation layout and detailed CAD/BIM drawing provisions, our expert engineering team ensures compliance with international standards such as ISO9001, CE, and GOST certifications.
Deep dive into macroeconomic infrastructure demands, material science breakthroughs, and evolving municipal engineering requirements.
Urban sprawl and intensifying climate anomalies have radically transformed municipal stormwater management frameworks worldwide. Municipalities across South America, Europe, Oceania, Africa, West Asia, Southeast Asia, and the Middle East are heavily upgrading their civil drainage systems. Procurement professionals now mandate high-grade stainless steel stormwater grates that combine exceptional hydraulic capacity with superior corrosion resistance under aggressive chemical and coastal environments.
NJMM’s market distribution highlights our capability to fulfill stringent international compliance mandates, providing reliable stormwater solutions that withstand heavy vehicular loading while maintaining pedestrian safety and anti-slip performance.
Modern infrastructure requires integrated engineering solutions. Stainless steel stormwater grates act as the first line of defense against urban flooding, debris obstruction, and structural erosion. Our technical roadmap leverages computer-aided stress analysis and automated resistance welding to produce trench covers and grating systems with optimized weight-to-load ratios.
By minimizing raw material consumption while maximizing structural resilience, NJMM helps EPC contractors and project developers reduce carbon footprints, accelerate construction timelines, and eliminate ongoing maintenance expenditures.
Adherence to rigorous international standards is non-negotiable in critical infrastructure. NJMM operates under certified management systems including ISO9001:2015 Quality Management, ISO14001:2015 Environmental Management, and ISO45001:2018 Occupational Health and Safety. As a recognized high-tech enterprise and municipal engineering research center, we actively participate in drafting and revising national steel grating standards (such as YB/T4001), guaranteeing that every stormwater grate delivered meets or exceeds global regulatory benchmarks.
Engineered for extreme environments, heavy chemical exposure, and high-load traffic zones.
Platform walkways, drainage trenches, and safety grates designed to withstand corrosive chemical agents, explosive atmospheres, and heavy industrial foot traffic.
High-grade marine stormwater covers providing exceptional resistance against saltwater corrosion, tidal fluctuations, and heavy container terminal loading.
Roadside trench covers, pedestrian pathways, and airport stormwater management systems ensuring rapid water runoff and lifelong durability.
Expert answers to common engineering and procurement inquiries regarding stainless steel stormwater grates.
We primarily utilize Austenitic stainless steel grades such as AISI 304 and AISI 316/316L. Grade 304 offers excellent general corrosion resistance for standard municipal projects, while Grade 316 provides superior resistance against chlorides, marine environments, and harsh chemical processing plants.
Yes. As a direct manufacturer with 12 automated production lines and advanced CAD/CAM design capabilities, we customize bearing bar thickness, depth, pitch spacing, and slip-resistant serrations to meet exact AASHTO, EN 1433, or local load class ratings (from pedestrian light duty to heavy vehicular Class D400).
Thanks to our large production capacity exceeding 50,000 tons annually and fully automated manufacturing processes, standard production cycles range from 15 to 25 days depending on project volume and specific surface treatment requirements.
NJMM operates under strict ISO9001 quality control protocols. Every batch undergoes dimensional inspection, weld integrity testing, load-bearing verification, and chemical composition analysis prior to secure crating and global dispatch.
Discover our comprehensive range of certified steel gratings, stair treads, and structural components.
Jiulong
