Dafang offered customized solution of 50-ton double girder overhead crane for a Mongolian steel mill. Dafang technical team specifically designed this large-capacity crane to address local operational challenges such as extreme temperatures as low as -30°C, heavy snowfall, and high dust levels. This QD 50 ton overhead crane features freeze-resistant, corrosion-resistant, and high-safety designs, along with full-process compliance certification. The solution achieved a 30% increase in operational efficiency and a 35% reduction in maintenance and operational costs. Dafang earned high praise from the client and set a benchmark for similar equipment selection at Mongolian steel mills.
I. Mongolian Project Background
As a resource-based economy, Mongolia's steel industry is the core of its industrial sector, supporting key areas like mineral extraction and infrastructure development. Local steel mills face extreme climate and operational challenges, including winter temperatures dropping to -30°C with daily fluctuations over 30°C, frequent heavy snowstorms, high-risk "Dzud" disasters, dust and high-temperature corrosion in the hot season, and requirements for high-altitude operations and long-span material handling.
This project customized a large-span double-girder bridge crane for a key Mongolian steel mill for molten steel transfer, billet loading/unloading, and equipment maintenance. It had to meet four core requirements: low-temperature freeze resistance, high-dust protection, heavy-load stability, and regulatory safety compliance.
II. Steel Mill Overhead Crane Project Challenges
- 1. Difficulty in Adapting to Extreme Climates: Low temperatures lead to metal embrittlement, hydraulic system failures, and electrical component malfunctions; heavy snowfall can easily cause equipment overload, affecting structural strength and stability.
- 2. Complex Operating Conditions at Steel Mills: High-temperature and dusty environments accelerate equipment corrosion and component wear; handling molten steel demands precision and safety to prevent leaks and collisions.
- 3. High Requirements for Cross-Regional Adaptability: Must comply with Mongolian National Safety Standards (MNS 4990:2015), relevant GOST specifications, and international ISO standards, while ensuring transportation, installation, and local operation and maintenance convenience.
- 4. Long Delivery and Operation/Maintenance Cycles: Mongolia's underdeveloped logistics infrastructure makes equipment transportation difficult; harsh winter construction conditions limit installation and commissioning timelines, requiring timely spare parts supply and technical support.
III. Features of the Custom-Designed Dafang Crane
(I) Specialized Design for Low-Temperature Environments
- 1. Freeze-resistant materials: The main girder and end beams use Q345D/E low-temperature toughness steel, passing the Charpy V-notch impact test to prevent -40°C brittleness fracture.
- 2. Snow-accumulation prevention: The main girder has a slightly angled open-web truss design to reduce snow and ice; snow-melting devices are installed at key spots to avoid operation impact.
- 3. Cold-resistant Electrical and Hydraulic systems: The electrical system uses low-temperature-resistant PLCs, servo motors, and IP65-rated sealed cables; the hydraulic system uses low-temperature hydraulic oil and a preheating device for cold-start and stable operation.
(II) Design Adapted to Steel Mill Operating Condition
- 1. High protection: The machine has a dual-layer anti-corrosion coating; critical components are hot-dip galvanized to resist dust corrosion; the cab has double-layer insulated glass and air conditioning for safety and comfort.
- 2. Heavy-load stability: It features a double-girder box-type structure optimized by finite element analysis, with deflection within L/700 for heavy loads like molten steel and steel billets.
- 3. Safety redundancy: It is equipped with multiple safety devices, including overload limiters, anti-collision devices, emergency stop buttons, and travel limit switches, meeting the MNS 4990:2015 safety standard.
(III) Cross-Regional Compliance and O&M Design
- 1. Full-Process Compliance Certification: Completed Mongolian national safety certification, GOST standard adaptation, and ISO 9001 quality certification in advance to ensure equipment compliance with local regulations.
- 2. Modular and Maintenance-Friendly Design: Key components are standardized and modularized for easy disassembly and transportation. Maintenance platforms and access ladders are provided to simplify maintenance, and multilingual operation manuals and remote technical support are available.
- 3. Adaptability to Multiple Control Modes: Supports cab operation, ground remote control, and wireless remote control to accommodate various steel-mill operational scenarios and enhance flexibility.
IV. 50 Ton Bridge Crane Specifications Table
| Specification | Specific Configuration | Application Notes |
|---|---|---|
| Rated Lifting Capacity | 20t/32t/50t (customizable) | Covers mainstream lifting needs such as molten steel ladles, steel billets, and equipment spare parts |
| Span | 16m/20m/24m (customizable) | Compatible with standard steel mill workshop layouts, meeting the needs of long-span material handling |
| Lifting Height | 12m-18m | Compatible with varying operational height requirements in steel mills, such as blast furnaces and raw material yards |
| Duty Class | A6 (Heavy Duty) | Meets the requirements for high-frequency, high-intensity continuous operations in steel mills |
| Operating Temperature | -30℃～+50℃ | Covers Mongolia’s extreme year-round climate, ensuring stable operation |
| Protection Rating | IP65 | Resists dust, rain, and snow in steel mills, extending equipment lifespan |
| Travel Speed | Gantry speed: 20 m/min, Trolley speed: 30 m/min, Hoisting speed: 1.6–16 m/min | Balances operational efficiency with precision |
| Safety Features | Overload limiter, anti-collision device, emergency stop, travel limit switches, anti-slip platform | Complies with Mongolian MNS 4990:2015 safety standards |
| Control Methods | Cab + wireless remote control + ground-level remote control | Adaptable to diverse operational scenarios in steel mills |
V. Project Progress and Achievements
(I) Project Progress
- 1. Requirements Alignment and Solution Design: Researched Mongolian steel mill's operating conditions, climate data, and compliance requirements. Designed a customized solution and passed client and third-party audits.
- 2. Manufacturing and Quality Control: Used freeze-resistant steel and anti-corrosion processes, adhered to ISO 9001 standards. Completed core tasks like main girder welding and electrical system assembly, and passed factory acceptance testing.
- 3. Packaging, Transportation, and On-Site Installation: Employed modular packaging for Mongolia's remote logistics. Shipped equipment before winter, finished on-site installation and commissioning before heavy snow, and trained operators.
- 4. Trial Operation and Acceptance: The equipment passed full-function tests, met Mongolian safety standards and steel mill's production requirements, and was successfully accepted and delivered.
(II) Achievements
- 1. Improved Operational Efficiency: The double-girder structure and precision control system increased hoisting efficiency by 30%, met peak-season continuous operation demand, and reduced downtime.
- 2. Reduced O&M Costs: Modular design and standardized spare parts shortened the maintenance cycle by 25% and increased spare part replacement efficiency by 40%, lowering long-term O&M costs.
- 3. Enhanced Safety Performance: Multiple safety protection devices and freeze-resistant design ensured zero safety incidents, safeguarded operators and equipment, and complied with Mongolian industrial safety regulations.
- 4. Optimized Local Adaptation: Equipment optimized for Mongolia's climate and operating conditions became the benchmark for local steel mills, enhancing the Dafang brand's influence in Mongolia's industrial sector.
VI. Customer Feedback
Mr. Batbold, Production Director at a Mongolian Steel Mill:
“The previously purchased cranes from a local crane supplier frequently occurred startup failures during Mongolian winters. After heavy snowfall, we had to manually clear the snow before operations could resume, severely impacting production. Dafang’s low-temperature preheating system and snow-resistant design have resolved these core pain points. The crane can start up quickly and operate stably even at -30°C, with no climate-related downtime throughout the year. It is also easy to operate, and workers can become proficient after just one week of training. Moreover, the maintenance costs have been reduced by 35% than before. It perfectly meets our practical needs.”
Mr. Munkh, Equipment Operations and Maintenance Manager at a Mongolian Steel Mill:
“The Dafang team’s response speed exceeded our expectations—for minor issues encountered during equipment operation, remote technical support provides solutions within an hour, and spare parts from the local inventory can be delivered within three days.
Compared to the brands we partnered with previously, Dafang’s full lifecycle service gives us complete peace of mind, and we have already planned to purchase their equipment again for our new plant expansion project.”
VII. Key Highlights of Equipment Selection Comparison in the Mongolian Market
| Comparison Criteria | Dafang Crane | Competitive Products in the Mongolian Market (European, American, Japanese, and Korean Brands) | Core Advantages |
|---|---|---|---|
| Extreme Cold Adaptability | Designed specifically for -30°C, featuring preheating and snow-prevention systems; structural steel passes low-temperature impact tests | General-purpose design with no specialized cold-weather optimization; high failure rate in winter | Superior climate adaptability ensures stable year-round operation |
| Compliance Certification | All MNS, GOST, and ISO certifications completed in advance, eliminating compliance risks upon deployment | Customers must coordinate local certifications independently; complex processes and long lead times | Streamlined deployment process, saving project time and costs |
| Operating and Maintenance | Modular design + local spare parts inventory, short maintenance cycles, and low spare parts costs rely on imports; | Core components spare parts procurement cycles are long (1–3 months) and costs are high | Costs More economical long-term operation and maintenance, reducing downtime losses |
| Delivery Cycle | Customized production + optimized logistics solutions, 3-month delivery and installation cycle | Overseas production + long-distance transportation, 6–8-month delivery cycle | Quickly responds to steel mills’ capacity expansion needs |
| Localized Services | Equipped with a Mongolian-speaking technical team, providing remote + on-site support | English-only service, slow on-site support response (over 72 hours) | Smoother communication, more efficient problem resolution |
VIII. Why Choose Dafang 50 Ton Overhead Crane?
1. Customization Experience for Extreme Operating Conditions: With expertise in extreme conditions like low-temperature, high-dust and heavy-load, we have export experience to Mongolia and Central Asia. We meet steel mills' core needs and solve climate-related challenges.
2. End-to-End Compliance Capabilities: We proactively align with Mongolian MNS, GOST, ISO and other standards, offering comprehensive certification services to reduce compliance risks and ensure smooth equipment deployment and operation.
4. Cost-Effectiveness and Reliability: Using modular design and high-quality freeze-resistant and corrosion-resistant materials, we ensure equipment performance and longevity while cutting procurement and operational costs, balancing economic efficiency with reliability.
3. Full Lifecycle Services: We offer one-stop services ranging from solution design, manufacturing, and transportation/installation to operation, maintenance training and spare parts supply. Our remote technical support team responds quickly to equipment maintenance needs in Mongolia.
5. Local Reputation and Support: We've supplied equipment to many steel mills in Mongolia, achieving stable operation and long zero-downtime periods. This has won recognition from local clients and industry associations, and we've set up a mature local service system.
