High-Quality Heavy Duty Stainless Steel Grating Suppliers & Factories

Featured Industrial Grating & Stair Treads

Explore our premium selection of certified heavy-duty steel gratings, industrial stair treads, and architectural components designed for extreme environments.

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ABOUT US

Pioneering Heavy Duty Grating Manufacturing Excellence Since 1993

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.

NJMM offers engineering service and support, including the design and installation of the grating solutions and the provision of detailed drawings if required. NJMM is committed to a continuous process to enhance customer service through product quality and delivery. NJMM had got the ISO9001 Quality System Certificate, CE certificate, GHOST certificate and other international certificates.

We believe our products are your best choice.

45,000

m² Total Facility Area

12

Auto Welding Product Lines

50,000+

Tons Annual Output

13+

Global Export Markets

Why Choose Jiulong Machinery

Craftsman Spirit, Global Expertise & Strict Quality Control Framework

Craftsman Spirit, Excellence

NJMM currently has two production bases, covering 45,000m² with 30,000m² workshop space. Equipped with 12 automatic pressure welding lines and 6 banding robots, ensuring top-tier precision for heavy-duty applications.

Quality is Like Life, Product is Character

Certified by ISO9001, ISO14001, ISO45001, and CE. NJMM participated in drafting and revising the YB/T4001 steel grating standard, earning recognition as a National High-Tech Enterprise and Municipal Engineering Center.

Efficient Production, Fast Delivery

Serving South America, Europe, Oceania, Africa, and Southeast Asia. Our "Longta" brand gratings empower mega-projects globally with reliable structural integrity and rapid fulfillment.

Enterprise Culture & Strategic Vision

Company Vision: To be the leader in steel grating market, the preferred supplier & A good corporate citizen.

Enterprise Mission: To provide the top quality products & services with global expertise; To build a harmonious environment for employees growing together with the company; To contribute to the advancement of both industry & society.

Global Macro-Industry Solutions & Applications

Engineered for extreme structural loads, chemical resistance, and heavy industrial environments.

Platform Walkway & Petrochemical

Widely utilized in refineries, light chemical industries, and mechanochemistry. Features superior ventilation, light transmission, heat dissipation, and explosion-proof properties.

Port Terminal & Heavy Engineering

Applied in shipyards, steel plants, mining, and military engineering. Offers robust load capacity, efficient drainage, and maintenance-free durability via hot-dip galvanization.

Cross-Sector Infrastructure

Essential for water treatment plants, cement factories, power plants, and high-altitude walkways. Minimizes wind resistance and maximizes safety with anti-slip serrated designs.

Comprehensive Product Portfolio

Discover our extensive range of forge-welded steel gratings, aluminum gratings, and specialized structural stair treads.

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Frequently Asked Questions (FAQ)

Expert answers regarding heavy-duty steel gratings, technical specifications, and global procurement.

1. What makes heavy-duty stainless steel grating suitable for extreme environments?

Heavy-duty stainless steel gratings offer exceptional tensile strength, superior corrosion resistance against chemical agents, and high load-bearing capabilities. Coupled with hot-dip galvanization or premium stainless steel grades (such as 304/316), they endure harsh marine, petrochemical, and industrial conditions without structural degradation.

2. How do I select the right bar grating specification for my industrial project?

Selection depends on span distance, expected static/dynamic load requirements, environmental corrosiveness, and safety considerations (e.g., slip resistance). Our engineering team at NJMM provides customized design support and detailed technical drawings based on international standards like YB/T4001 and ANSI/NAAMM.

3. What international certifications do Jiulong Machinery's products hold?

Our manufacturing processes and products comply with strict international benchmarks, holding ISO9001 Quality Management System, ISO14001 Environmental Management, ISO45001 Occupational Health & Safety, CE certification, and GOST certificates.

4. What is the typical lead time and annual production capacity for global orders?

With 12 advanced automatic pressure welding lines across two major production bases, NJMM achieves an annual output exceeding 50,000 metric tons, ensuring rapid turnaround times and efficient global logistics to over 13 countries and regions.