Key Considerations for Dimensions of Exported Diesel Generator Sets

When exporting diesel generator sets, dimensions are a critical factor that affects transportation, installation, compliance, and more. Below are detailed considerations:

1. Transportation Size Limits

• Container Standards:
  • 20-foot container: Internal dimensions approx. 5.9m × 2.35m × 2.39m (L × W × H), max weight ~26 tons.
  • 40-foot container: Internal dimensions approx. 12.03m × 2.35m × 2.39m, max weight ~26 tons (High cube: 2.69m).
  • Open-top container: Suitable for oversized units, requires crane loading.
  • Flat rack: Used for extra-wide or non-disassembled units.
  • Note: Leave 10-15cm clearance on each side for packaging (wooden crate/frame) and securing.
• Bulk Shipping:
  • Oversized units may require breakbulk shipping; check port lifting capacity (e.g., height/weight limits).
  • Confirm unloading equipment at the destination port (e.g., shore cranes, floating cranes).
• Road/Rail Transport:
  • Check road restrictions in transit countries (e.g., Europe: max height ~4m, width ~3m, axle load limits).
  • Rail transport must comply with UIC (International Union of Railways) standards.

2. Generator Size vs. Power Output

• Typical Size-Power Ratio:
  • 50-200kW: Usually fits a 20ft container (L 3-4m, W 1-1.5m, H 1.8-2m).
  • 200-500kW: May require a 40ft container or breakbulk shipping.
  • >500kW: Often shipped breakbulk, possibly disassembled .
• Custom Designs:
  • High-density units (e.g., silent models) may be more compact but require thermal management.

3. Installation Space Requirements

• Base Clearance:
  • Allow 0.8-1.5m around the unit for maintenance; 1-1.5m overhead for ventilation/crane access.
  • Provide installation drawings with anchor bolt positions and load-bearing specs (e.g., concrete foundation thickness).
• Ventilation & Cooling:
  • Engine room design must comply with ISO 8528, ensuring airflow (e.g., radiator clearance ≥1m from walls).

4. Packaging & Protection

• Moisture & Shock Proofing:
  • Use anti-corrosion packaging (e.g., VCI film), desiccants, and secure immobilization (straps + wooden frame).
  • Reinforce sensitive components (e.g., control panels) separately.
• Clear Labeling:
  • Mark center of gravity, lifting points (e.g., top lugs), and max load-bearing areas.

5. Destination Country Compliance

• Dimensional Regulations:
  • EU: Must meet EN ISO 8528; some countries restrict canopy sizes.
  • Middle East: High temperatures may require larger cooling space.
  • USA: NFPA 110 mandates fire safety clearances.
• Certification Documents:
  • Provide dimensional drawings and weight distribution charts for customs/installation approval.

6. Special Design Considerations

• Modular Assembly:
  • Oversized units can be split (e.g., fuel tank separate from main unit) to reduce shipping size.
• Silent Models:
  • Soundproof enclosures may add 20-30% volume—clarify with clients beforehand.

7. Documentation & Labeling

• Packing List: Detail dimensions, weight, and contents per crate.
• Warning Labels: E.g., “Off-center gravity,” “Do not stack” (in local language).

8. Logistics Coordination

• Confirm with freight forwarders:
  • Whether oversized transport permits are needed.
  • Destination port fees (e.g., heavy lift surcharges).

Critical Checklist

1. Verify if packaged dimensions fit container limits.
2. Cross-check destination road/rail transport restrictions.
3. Provide installation layout plans to ensure client site compatibility.
4. Ensure packaging meets IPPC fumigation standards (e.g., heat-treated wood).

Proactive dimension planning prevents shipping delays, extra costs, or rejection. Collaborate early with clients, freight forwarders, and installation teams.