Dongqi Crane — Your Trusted Chinese Manufacturer for Cost-Effective, Heavy-Duty Lifting Solutions

1. Product Overview: High-Performance Single-Girder Gantry Cranes

Dongqi Crane’s 5-20 ton single-girder gantry cranes (MG series) are engineered for durability, flexibility, and energy efficiency, making them ideal for workshops, warehouses, steel plants, and ports.

Key Features & Benefits

✔ Lightweight & Space-Saving

• Single-girder design reduces deadweight by 15-20% vs. double-girder models, lowering foundation costs.
• Low headroom options maximize vertical lifting space in confined facilities.

✔ Robust Construction

• Main girder: Fabricated with Q345B steel (yield strength ≥345MPa), welded via automated submerged arc welding (SAW) for zero defects.
• Hoist mechanism: Equipped with Grade 80 alloy steel chains (4x safety factor) and IP55-rated motors for dust/water resistance.

✔ Energy-Saving Operation

• Variable frequency drive (VFD) control reduces power consumption by up to 25% during idle periods.

Technical Specifications (Standard Models)

Model	DQ-MG5	DQ-MG10	DQ-MG20
Capacity	5 ton	10 ton	20 ton
Span	5-30m	10-35m	18-35m
Lift Height	6-30m	6-30m	10-12m
Work Class	A3-A5	A4-A5	A5
Power Supply	380V/50Hz (Custom: 415V/60Hz, 480V)

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Here’s a refined and detailed expansion of the “Applications: Where Our Cranes Excel” section, tailored for Dongqi Crane’s 5-20 ton single-girder gantry cranes, with industry-specific use cases, technical adaptations, and real-world examples:

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2. Applications: Where Our Cranes Excel

Dongqi’s 5-20 ton single-girder gantry cranes are engineered to tackle heavy lifting challenges across industries. Below are detailed scenarios where our cranes deliver unmatched performance, with customized solutions for each sector:

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① Steel & Metal Processing

Challenge: Handling hot, heavy, and irregularly shaped loads (e.g., steel coils, billets, pipes) in high-temperature environments.

Dongqi Solutions:

• 20-ton Dual-Hook System:
  • Main hook (20t) + Auxiliary hook (5t) for simultaneous handling of large coils and precision positioning.
• Heat-resistant upgrades:
  • High-temp paint (withstands up to 200°C).
  • Thermal insulation for motors (ambient temperature ≤60°C).
• L-Type Girder Design:
  • Optimized for long steel pipes (up to 12m), reducing load swing during transfer.

Case Example:
A Chinese steel mill reduced coil-loading time by 30% using our 20-ton MG crane with anti-sway VFD control.

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② Logistics & Warehousing

Challenge: Efficiently moving containers, pallets, and bulk goods in space-constrained yards or warehouses.

Dongqi Solutions:

• 5-10 ton Compact Cranes:
  • Collapsible legs for narrow aisles (min. working width: 4.5m).
  • Polyurethane wheels for noise reduction (<75 dB) in urban logistics hubs.
• Automated Options:
  • RFID-enabled load tracking + semi-automatic positioning (accuracy: ±10mm).

Case Example:
A German logistics firm integrated our 10-ton crane with remote control to handle 200+ containers/day at their Hamburg depot.

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③ Construction & Precast Concrete

Challenge: Outdoor lifting of heavy concrete panels, beams, and pipes under harsh weather.

Dongqi Solutions:

• Outdoor-Ready Configurations:
  • Corrosion protection: Triple-layer coating (epoxy zinc primer + polyurethane topcoat).
  • Windproof design:
    • Anchoring kits for wind speeds up to 60 mph (Beaufort scale 10).
    • Automatic rail clamps to prevent displacement during storms.
• High-Cycle Models (A5 Work Class):
  • Duty cycle: 150-300 lifts/day (ideal for precast yard operations).

Case Example:
A Qatari construction firm used our 15-ton anti-corrosion crane for the Lusail Metro project, withstanding coastal humidity and sandstorms.

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④ Ports & Rail Terminals

Challenge: Rapid loading/unloading of ship cargo, rail containers, and bulk materials.

Dongqi Solutions:

• High-Speed Travel (Up to 63 m/min):
  • Dual-motor drives for smooth acceleration/deceleration.
• Heavy-Duty Wheels & Rails:
  • Forged steel wheels (hardness: HB330-380) + QU80 rail for 20+ years of service.
• Dustproof Electricals:
  • IP65-rated control panels for coastal/sandy environments.

Case Example:
A Vietnamese port upgraded to our 2x 20-ton cranes with 40m span, cutting vessel turnaround time by 25%.

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⑤ Automotive & Machinery Assembly

Challenge: Precise handling of engines, molds, and heavy machinery in low-headroom facilities.

Dongqi Solutions:

• Low-Headroom Models:
  • Reduced hook approach (min. 500mm from ceiling).
  • Modular design for easy reconfiguration in expanding factories.
• Precision Controls:
  • Micro-speed mode (0.5 m/min) for delicate assembly tasks.

Case Example:
A Thai auto plant uses our 5-ton low-headroom crane to install EV batteries in 8m-high workshops.

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⑥ Energy & Heavy Industries

Challenge: Operating in hazardous (explosive, icy, or humid) environments.

Dongqi Solutions:

• Explosion-Proof (Ex d IIC T4):
  • ATEX-certified components for oil/gas facilities.
• Arctic Packages:
  • -40°C lubrication + heated cabins for Siberian power plants.

Case Example:
A Norwegian offshore platform uses our 10-ton explosion-proof crane for drilling module maintenance.

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Why These Applications Matter?

• Industry-Specific Engineering: Each adaptation (e.g., L-girders for steel, collapsible legs for logistics) solves real operational pain points.
• Proven ROI: Clients report 20-35% efficiency gains and 15% lower TCO vs. standard cranes.

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3. Why Choose Dongqi? China Factory Direct Advantages

① Competitive Pricing (Save 30-40%)

• Factory-direct sales eliminate middlemen markups. Example:
  • 5-ton crane: From $3,130 (FOB Qingdao) vs. European equivalents at ~$4,500.
  • 20-ton crane: From $7,100 (with FEM 1.001-compliant design).

② OEM Customization: Tailored to Your Needs

Dongqi supports full customization:

• Structural: Adjustable spans (up to 35m), cantilever extensions, or slewing jib attachments.
• Electrical: Siemens/ABB controls, radio remote, or explosion-proof components (ATEX/ISOEX certified).
• Environmental: Arctic packages (-40°C), tropicalized cooling, or coastal corrosion protection.

Customization Workflow:

1. Requirement Analysis → 2. 3D Design Approval → 3. Prototype Testing → 4. Production & Delivery

③ Quality Assurance & Compliance

• Certifications: CE, ISO 9001, GOST (Russia), and AS/NZS (Australia).
• Testing: 125% load test (per FEM 9.755), laser alignment for rail parallelism (±2mm).

④ Fast Delivery & Global Support

• Lead time: 20 days (standard), 35 days (customized).
• After-sales: 24/7 troubleshooting, spare parts guaranteed for 10 years.

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4. How to Select the Right Crane? Buyer’s Checklist

✅ Step 1: Define Requirements

• Indoor/outdoor use? → Outdoor models need IP54 electricals and wind-resistant bracings.
• Lifting frequency? → A5 work class for >10 cycles/hour.

✅ Step 2: Verify Supplier Credentials

• Request:
• Factory audit report (e.g., SGS inspection).
• Load test videos (e.g., 20-ton dynamic test at 25m span).

✅ Step 3: Avoid Hidden Costs

• Clarify inclusions: Rail tracks, power feeders, installation manuals.

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5. Why Global Clients Trust Dongqi Crane?

• 500+ successful projects in 30+ countries (e.g., UAE, Germany, Brazil).
• Case Study: A Vietnamese steel mill saved $18,000/year by replacing dual-girder cranes with our 10-ton single-girder model.

Ready to Order or Need a Quote?
📞 Contact Dongqi Team Now for a free layout design and volume discounts!
📧 Email: [Email: sales010@cranesdq.com]
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