Establishing Excellence through Decades of Engineering Precision
Founded in 1993, Ningbo Jiulong Machinery Manufacturing Co., Ltd (NJMM) has evolved from a specialized workshop into a global powerhouse in the design and fabrication of steel grating, railings, and light steel structures. Our footprint spans two massive production bases in East and North China, operating 12 automated pressure welding lines. This isn't just manufacturing; it's a synthesis of scientific research, digital design, and robust engineering construction. As a leading Custom Galvanized Grating Sizes Supplier, we understand that "one size fits all" is a myth in heavy industry.
With an annual output exceeding 50,000 metric tons, NJMM serves the most demanding sectors—from offshore oil rigs to high-tech pharmaceutical plants. Our commitment to ISO9001, CE, and GOST certifications ensures that every square meter of grating meets rigorous international safety and durability standards. We don't just supply products; we provide detailed engineering support, installation layouts, and the "Information Gain" required for complex procurement decisions.
Integrating Digital Intelligence with Traditional Craftsmanship
We utilize 6 sets of automatic banding robots and 2 sets of irregular grating fabrication platforms, ensuring custom sizes are cut with sub-millimeter accuracy, reducing on-site modifications by 95%.
Our hot-dip galvanization process (post-fabrication) provides superior anti-corrosion properties, extending product life in saline and acidic environments by up to 25 years.
NJMM’s supply chain is built for resilience. With dual production bases, we mitigate regional disruptions, ensuring consistent delivery to Europe, South America, and the Middle East.
The next decade of steel grating will be defined by Smart Infrastructure. NJMM is currently developing sensor-integrated grating systems capable of monitoring load stress and corrosion levels in real-time. By 2026, our "Green Factory" initiative aims to reduce carbon emissions in the galvanization process by 30% through closed-loop heat recovery systems. When you choose NJMM, you are partnering with a factory that looks beyond the steel to the digital future of construction.
Specific Configurations for Global Industrial Applications
Recommended Sizes: JG255/30/100, JG325/30/100, JG405/30/100
Focus on ventilation, light penetration, and explosion-proof properties. Serrated surfaces are mandatory for anti-slip performance in oil-slick conditions.
Recommended Sizes: G505/30/100, JG705/30/100, JG1008/30/100
Heavy-duty loading capacity for dock cranes and equipment protection. High-zinc coating thickness (85μm+) to resist salt-spray corrosion.
Applications: Ceiling, Ditch Covers, Ventilation Screens
Focus on aesthetic neatness and "cleanability." The grid structure prevents grime accumulation while allowing maximum drainage for urban storm-water systems.
A common mistake in procurement is over-specifying steel thickness, leading to unnecessary costs. NJMM’s engineering team uses finite element analysis (FEA) to determine the optimal Custom Galvanized Grating Size based on the clear span and intended load (Pedestrian vs. Vehicular). For instance, a JG325/30/100 configuration offers the perfect balance for standard industrial walkways with a 1200mm span.
We ensure compliance with YB/T4001.1-2007 (China), ANSI/NAAMM MBG531-00 (USA), and BS4592-1:2006 (UK). Our localized support includes providing 3D CAD models and Revit files for BIM (Building Information Modeling) integration, allowing engineers to visualize grating layouts before the first bar is welded.
Global enterprises now demand ESG (Environmental, Social, and Governance) transparency. NJMM’s certification as a "Green Factory" and our ISO14001:2015 environmental management system provide the necessary compliance for Tier-1 construction contractors worldwide.
Per international standards, we maintain a length tolerance of +0/-5mm and width tolerance of +/-5mm. For high-precision projects, our laser-cutting equipment can achieve +/-1.5mm.
Hot-dip galvanization involves dipping the steel in 450°C molten zinc. We calculate thermal expansion during the design phase to ensure that the finished product fits perfectly into your supporting frames.
Yes, we can fabricate serrated surfaces for bearing bars from 25mm to 100mm in thickness, providing maximum slip resistance for wet or oily environments.
With 12 production lines, we can complete 50-ton orders within 7-10 days. Shipping to major ports like Rotterdam, Dubai, or Santos typically takes 25-35 days.
Trusted by the World's Leading Engineering and Construction Firms
Jiulong
