Introduction

In the demanding and hazardous environments of petrochemical engineering, operational safety and equipment reliability are not just priorities—they are imperatives. Dongqi Crane proudly presents its state-of-the-art Explosion-Proof Bridge/Overhead Crane with Hook, specifically engineered to meet the rigorous demands of the petrochemical industry. With a robust 75/20-ton lifting capacity and full CE certification, this crane represents the pinnacle of safety, durability, and performance in hazardous location material handling.

Key Features and Design Philosophy

1. Advanced Explosion-Proof Protection System

At the core of this crane is its comprehensive explosion-proof design, essential for environments where flammable gases, vapors, or combustible dusts may be present.

• Explosion-Proof Electrical Components: All electrical elements—including motors, control panels, limit switches, and wiring—are housed within specially designed enclosures that prevent internal sparks or excessive heat from igniting external atmospheric hazards.
• Mechanical Safety Design: The crane features anti-spark mechanisms on hooks, trolleys, and moving parts. Surfaces are designed to minimize friction-induced sparks, with specialized coatings and materials used in critical contact areas.
• Temperature Control: Rigorous thermal management ensures that all components operate below the ignition temperatures of specified hazardous substances.

2. Dual-Hook Capacity Configuration (75/20t)

The unique 75/20-ton dual-hook system offers exceptional operational versatility:

• Main Hook (75-ton): Designed for heavy lifting of large process equipment, reactors, columns, and other substantial components common in petrochemical facilities.
• Auxiliary Hook (20-ton): Provides precision handling for smaller loads, maintenance activities, and balancing operations, enhancing overall operational efficiency.
• Independent Control Systems: Each hook operates with separate control mechanisms, allowing simultaneous or independent operation as workflow demands.

3. CE Certification Compliance

Dongqi’s explosion-proof crane meets all CE marking requirements, demonstrating compliance with essential health, safety, and environmental protection standards:

• Machinery Directive 2006/42/EC: Ensuring comprehensive safety in design and construction.
• ATEX Directive 2014/34/EU: Specifically addressing equipment intended for use in explosive atmospheres.
• Electromagnetic Compatibility Directive: Guaranteeing safe operation without interfering with other equipment.
• Full Documentation: Complete technical files, risk assessments, and declarations of conformity accompany each crane.

Technical Specifications and Parameters

Structural Components

• Capacity Configuration: 75/20t dual-hook system
• Span: Customizable from 10.5m to 31.5m (standard), with extended spans available
• Lifting Height: Up to 30m (adjustable based on facility requirements)
• Work Class: A6 (heavy duty service) according to FEM 9.511 standards
• Control System: Variable frequency drive (VFD) for smooth acceleration/deceleration

Explosion-Proof Classifications

• Gas Group: IIA, IIB, or IIC (depending on specific hazard assessment)
• Temperature Class: T1-T6 (based on maximum surface temperature requirements)
• Protection Level: IP65 or higher for electrical components
• Zone Classification: Suitable for Zone 1, Zone 2, Zone 21, or Zone 22 hazardous areas

Performance Characteristics

• Lifting Speed: 0.5-2.5 m/min (main hook), 2.0-7.0 m/min (auxiliary hook) – adjustable via VFD
• Traveling Speed: 20-32 m/min (crane), 16-25 m/min (trolley)
• Positioning Accuracy: ±10mm with optional precision positioning systems
• Noise Level: <85dB(A) in operation

Petrochemical Industry Applications

Refinery Operations

• Reactor Installation and Maintenance: Safe handling of catalytic cracking units, hydrotreaters, and reformers.
• Column and Vessel Handling: Precise placement of distillation columns, scrubbers, and separators.
• Heat Exchanger Maintenance: Careful removal and replacement of tube bundles and shell assemblies.

Chemical Processing Plants

• Batch Reactor Handling: Movement of pressurized vessels and mixing systems.
• Pipeline Module Installation: Lifting of pre-fabricated pipe racks and process modules.
• Catalyst Handling: Safe transport of sensitive and often valuable catalyst materials.

Storage and Terminal Facilities

• Tank Maintenance: Handling of roof sections, internal components, and associated equipment.
• Loading Arm Installation: Precise placement of fluid transfer systems.
• Emergency Response Equipment: Capability to move containment systems and response gear when needed.

LNG and Cryogenic Facilities

• Cold Box Installation: Handling of delicate heat exchanger assemblies.
• Insulation Work: Placement of complex insulation systems around process equipment.
• Compressor and Turbine Maintenance: Careful removal and replacement of rotating equipment.

Safety Systems and Operational Features

Multi-Layer Protection Mechanisms

1. Overload Protection: Electronic limiter with automatic cut-off prevents exceeding rated capacity
2. Dual Braking Systems: Fail-safe mechanical and electrical braking on all motions
3. Anti-Collision Systems: Infrared or radar-based systems prevent interference with adjacent cranes or structures
4. Emergency Stop Circuits: Multiple accessible stop buttons with lock-out/tag-out provisions
5. Load Moment Protection: Prevents dangerous load swings and tipping scenarios

Environmental Adaptations

• Corrosion Resistance: Special coatings and stainless steel components withstand aggressive chemical atmospheres
• Temperature Tolerance: Designed for operations from -20°C to +55°C (extended ranges available)
• Sealed Components: Protection against dust, moisture, and chemical ingress
• Lighting Systems: Explosion-proof LED work lights with appropriate hazardous area ratings

Why Choose Dongqi Explosion-Proof Cranes?

Engineering Excellence

Dongqi combines decades of crane manufacturing experience with specialized expertise in hazardous environment equipment. Our engineering team works closely with petrochemical clients to understand specific operational challenges and develop tailored solutions.

Quality Assurance

Every explosion-proof crane undergoes rigorous testing:

• Factory Acceptance Tests: Full functional testing under simulated conditions
• Explosion-Proof Verification: Third-party validation of protective measures
• Load Testing: 125% static load test and 110% dynamic load test
• Documentation Review: Complete verification of all safety and compliance documentation

Lifecycle Support

• Installation Supervision: Certified technicians ensure proper installation and commissioning
• Training Programs: Comprehensive operator and maintenance training
• Preventive Maintenance Plans: Scheduled service programs to maximize uptime
• Spare Parts Availability: Guaranteed availability of critical components
• Technical Support: 24/7 emergency support for critical operations

Cost Efficiency

• Reduced Downtime: Reliable performance minimizes production interruptions
• Lower Insurance Premiums: Certified safety systems often qualify for reduced insurance costs
• Energy Efficiency: Variable frequency drives reduce power consumption by up to 40%
• Long Service Life: Robust construction and quality components extend operational lifetime

Customization Options

Dongqi understands that each petrochemical facility has unique requirements. Available customizations include:

• Specialized hook configurations (rotating, motorized, or custom grabs)
• Remote control systems (wired or radio, with explosion-proof certification)
• Automated positioning systems for repetitive operations
• Special environmental protections (enhanced corrosion resistance, wider temperature ranges)
• Integration with plant DCS or SCADA systems
• Special lighting configurations for specific work areas
• Fire-resistant hydraulic systems where applicable

Compliance and Certification Documentation

Each Dongqi explosion-proof crane ships with complete documentation:

1. CE Declaration of Conformity
2. ATEX Certification for explosive atmospheres
3. Full test reports and inspection certificates
4. Risk assessment documentation
5. Installation and maintenance manuals
6. Electrical schematics and explosion-proof containment drawings
7. Component certification files for all protected elements
8. Recommended spare parts list and maintenance schedule

Conclusion

In the high-stakes environment of petrochemical engineering, equipment failure is not an option. The Dongqi 75/20t Explosion-Proof Bridge Crane with CE Certification represents more than just material handling equipment—it embodies a comprehensive safety philosophy engineered into every component and system.

By choosing Dongqi, petrochemical companies secure not only a lifting solution but a partnership with experts in hazardous environment crane technology. Our commitment to quality, safety, and reliability ensures that your operations proceed with maximum efficiency and minimum risk.

For detailed specifications, site-specific configurations, or to arrange a consultation with our explosion-proof crane specialists, contact Dongqi Crane today. Let us help you engineer safety and efficiency into your most critical lifting operations.

---

Dongqi Crane: Engineering Safety, Lifting Progress