Shipping Subsea Lifting Frames: A Comprehensive Guide

Assess the Cargo

Pre-Shipment Inspection

A thorough pre-shipment inspection is vital. Verify dimensions, weight, center of gravity, material (steel, aluminum, etc.), and any unique features affecting handling and transport. Document this inspection meticulously.

Detailed Specifications

Record precise dimensions (length, width, height), weight (including ballast), and the calculated center of gravity. Note structural features, potential weak points, or areas needing extra protection. Material composition (e.g., steel grade, aluminum alloy) is crucial for determining handling and securing methods.

Choosing the Optimal Shipping Method

Breakbulk Shipping

Vessel Types

Heavy-lift vessels, including semi-submersible and specialised heavy-lift ships.

Pros

Suitable for extremely large and heavy frames exceeding other methods' capacity.

Cons

High cost, longer transit times, infrequent sailings.

Weight Limits

Virtually unlimited, depending on vessel capacity.

Out of Gauge (OOG) using Flat Racks

Vessel Types

Container ships with sufficient deck space and crane capacity.

Pros

Good cargo visibility and accessibility; relatively cost-effective for large but manageable frames.

Cons

Susceptible to weather damage if inadequately protected.

Weight Limits

Typically up to 100 tonnes, depending on flat rack and vessel specifications.

OOG using Open-Top Containers

Vessel Types

Container ships with sufficient crane capacity.

Pros

Suitable for frames exceeding height restrictions but within weight and other dimensional limits.

Cons

Limited protection from the elements.

Weight Limits

Typically up to 40 tonnes, depending on container and vessel specifications.

Secure Necessary Permits and Documentation

Required Documentation

Export/import licenses, commercial invoice, packing list, bill of lading, certificate of origin, phytosanitary or other certificates, IMO, ISPS documentation, and other relevant permits specific to the cargo and destination.

Customs Broker

Using a customs broker is recommended to navigate international regulations and ensure smooth customs clearance.

Packaging and Crating

Protective Measures

While often shipped without crating, consider protective coatings for corrosion protection, padding to prevent impact damage, and weatherproofing. Material choice depends on the frame's design and transit conditions.

Crating Materials

Options include plywood, steel, or specialised composite materials, depending on size, weight, and fragility.

Lashing and Securing

Techniques and Materials

Use robust lashing and securing techniques with wire rope, chains, and high-strength straps. Consult experienced riggers and lashing specialists. Thorough documentation of the securing process is essential.

Port Selection

Criteria

Choose ports equipped to handle OOG cargo and heavy-lift operations. Consider proximity to the final destination, availability of specialised equipment (cranes, heavy-lift vehicles), and port infrastructure for oversized and heavy cargo.

Vessel Selection

Key Factors

Beyond lifting capacity, consider vessel stability, deck space, crane type and capacity, and suitability for handling OOG cargo. Confirm compliance with safety regulations and standards.

Transportation to Port

Specialized Transport

Arrange transport using specialised heavy-duty vehicles capable of handling oversized and heavy loads. Obtain necessary permits for oversized loads on public roads.

Loading and Unloading

Safety Procedures

Supervise loading and unloading using appropriate safety equipment and procedures to prevent damage and ensure personnel safety. This includes specialised lifting equipment and trained personnel.

Insurance

Comprehensive Coverage

Secure comprehensive cargo insurance, such as all-risks coverage or Institute Cargo Clauses, to cover potential damage or loss during transit.

Tracking and Monitoring

Real-time Tracking

Use GPS and vessel tracking systems to monitor shipment location and progress.

Delivery and Unpacking

Safe Unloading

Oversee unloading and unpacking at the destination port, employing appropriate safety procedures to prevent damage and ensure personnel safety.

Important Considerations

Weight Distribution

Ensure even weight distribution to prevent instability. Specify tolerances based on the frame's design and transport method.

Weather Conditions

Account for potential weather impacts and implement appropriate protective measures.

Compliance

Adhere to all relevant safety regulations and international shipping standards, including ISO and IMO regulations.

Experienced Professionals

Engage experienced professionals throughout the process, including freight forwarders specializing in OOG cargo, heavy-lift operators, and riggers. Information on such services may be available from Shipping International.