15 Ton Explosion-Proof Overhead Crane Successfully Deployed in Nigerian Factory

Project Background

In 2025, Dongqi Crane designed and manufactured two sets of high-performance explosion-proof overhead cranes for a client in Nigeria’s oil and gas processing sector. The client operates a demanding workshop environment that handles heavy equipment, valves, and steel components requiring frequent lifting and positioning during production and maintenance activities.

The primary challenge was ensuring operational safety in an environment where flammable gases and vapors may be present. In such conditions, any spark from standard crane equipment could lead to serious consequences, making specialized explosion-proof handling equipment essential for both safety and compliance with international standards.

Client Requirements

The client presented specific operational requirements that demanded a tailored solution:

• Safe lifting solution suitable for hazardous working environments
• Lifting capacity of 15 tons to handle their heaviest equipment
• Crane span of 13 meters to fit the workshop layout
• Lifting height of 8.95 meters ensuring adequate clearance
• Power supply: 400V, 50Hz, 3 Phase matching Nigeria’s industrial standard
• Two crane units for parallel operations
• Complete system with runway beams
• Explosion-proof standard: Ex II 2 G Ex de IIC T4 for gas-risk areas

Our Solution: QDX Series European Double Girder Explosion-Proof Cranes

Dongqi Crane provided a comprehensive solution incorporating the QDX series European double girder overhead crane, specifically customized for the client’s needs.

Crane Design Specifications

• Crane Type: QDX European-style double girder overhead crane
• Lifting Capacity: 15 tons
• Span: 13 meters
• Lifting Height: 8.95 meters
• Power Supply: 400V, 50Hz, 3 Phase
• Quantity: 2 units

Explosion-Proof Configuration

The cranes were engineered with complete explosion-proof protection meeting Ex II 2 G Ex de IIC T4 standards, ensuring safe operation in environments with potentially explosive gases. This comprehensive safety approach included:

• Explosion-proof electrical components throughout the system
• Specialized crane wheels made of materials that prevent friction sparks
• Enhanced safety features for all motors and electrical equipment

Factory testing of the explosion-proof overhead crane prior to shipment

Advanced Features

The QDX series cranes provided several technological advantages:

• Compact structure with low headroom design for optimal space utilization
• Lightweight construction reducing wheel pressure and building stress
• Modular design for easier maintenance and component replacement
• Advanced control systems for smooth and precise operation

Project Execution

The project followed a systematic approach to ensure quality and timely delivery:

1. Detailed Engineering: Preparation of workshop-specific drawings based on precise measurements
2. Fabrication & Testing: Manufacturing followed by comprehensive factory testing including load tests and functional checks
3. Secure Packaging: Special protective measures for long-distance sea transportation to Nigeria
4. Installation Support: Remote guidance and technical support for proper installation and commissioning

Results and Client Benefits

After installation, the client observed significant improvements in their operations:

• Enhanced Safety: The explosion-proof design eliminated spark-related hazards, allowing safe material handling in potentially explosive environments
• Space Optimization: The low headroom hoist and compact crane design maximized lifting height within the limited workshop space
• Reduced Downtime: High-quality components and explosion-proof protection resulted in fewer maintenance interruptions
• Operational Efficiency: Both cranes operated seamlessly along the runway system, enabling parallel lifting tasks
• Regulatory Compliance: Full adherence to international safety standards for hazardous environments

Conclusion

This project successfully delivered two customized 15-ton explosion-proof overhead cranes that perfectly matched the client’s operational requirements and environmental challenges. The solution demonstrates Dongqi Crane’s capability to provide specialized lifting equipment for demanding industrial sectors, particularly in hazardous environments like oil and gas processing.

The implementation highlights the importance of choosing properly designed explosion-proof crane systems for industries in Nigeria and similar markets where safety and reliability are paramount.

---

Dongqi Crane specializes in providing customized overhead crane solutions for various industries worldwide. For more information about our explosion-proof cranes or other lifting equipment, contact our engineering team today.