DNV 2.7-1 or DNV 2.7-3: How to Choose the Right Standard?

For offshore lifting, transport and equipment deployment, choosing the right DNV standard is not just a paperwork issue. It affects the unit design, lifting arrangement, testing method, certification scope and long-term safety in harsh marine environments.

In simple terms, DNV 2.7-1 is mainly used for offshore containers and cargo carrying units, while DNV 2.7-3 is used for portable offshore units, often with built-in equipment or special functions. If you are sourcing an offshore container, subsea basket, offshore skid, workshop module or equipment package, understanding this difference helps you avoid over-specifying, under-specifying or delaying project approval.

Magindustry supplies DNV-certified offshore equipment including standard offshore CCUs, subsea baskets, offshore skids and customized offshore modules for oil & gas, marine engineering and energy projects.

Quick Answer: DNV 2.7-1 vs DNV 2.7-3

What Is DNV 2.7-1?

DNV 2.7-1 is widely used for offshore containers and cargo carrying units, often called CCUs. These units are built for repeated lifting between supply vessels, offshore platforms and marine worksites.

Common DNV 2.7-1 products include:

● Offshore cargo containers

●Open top containers

●Offshore baskets

●Mud skips and waste skips

●Bottle racks

●Tool containers

●Reefer or special-purpose offshore containers

For example, Magindustry’s DNV 2.7-1/3 offshore containers are available in common sizes such as 6ft, 8ft, 10ft, 15ft, 20ft and 40ft, with custom configurations for project-specific cargo.

What Is DNV 2.7-3?

DNV 2.7-3 applies to portable offshore units. These are not just empty cargo boxes. They are usually designed to carry or integrate equipment that performs a specific offshore function.

Typical DNV 2.7-3 applications include:

●Offshore equipment skids

●ROV-related baskets or units

●Portable service packages

●Special lifting frames

●Equipment modules used on platforms or vessels

●Units with mechanical, hydraulic, electrical or process equipment

A subsea basket or ROV basket, for example, may require closer review of lifting arrangement, equipment securing, loading points and offshore handling conditions.

The Core Difference

The easiest way to distinguish the two standards is to ask one question:

Is the unit mainly used to carry cargo, or is it a portable offshore equipment unit with a defined function?

If it is mainly for transporting materials, tools or general cargo, DNV 2.7-1 is usually the starting point. If the unit contains installed equipment, special operation features or a more complex functional structure, DNV 2.7-3 may be more suitable.

How to Choose the Right Standard

Choose DNV 2.7-1 When You Need

●A certified offshore container or CCU

●Safe lifting from vessel to platform

●Transport of tools, spare parts, equipment or materials

●Standard or customized offshore basket

●Waste skip, mud skip or cargo frame

●A unit mainly used for logistics and cargo handling

For long or oversized cargo, a subsea basket is often a practical option because it supports easier loading, securing and offshore lifting.

Choose DNV 2.7-3 When You Need

●A portable offshore equipment unit

●A skid-mounted system

●A unit with built-in equipment

●Special offshore operational function

●Defined center of gravity and interface points

●Project-specific engineering review

If your unit includes generators, electrical systems, pressure systems or hazardous-area requirements, you may also need to consider other standards alongside DNV, such as explosion-proof or fire-rated requirements. Magindustry also supplies offshore pressurized modules and Zone 2 gensets for offshore and hazardous-area use.

Key Parameters to Confirm Before Ordering

Before requesting a quotation, prepare the following information. It helps the supplier confirm the correct standard, structure and certification route.

1. Application

Explain how the unit will be used: cargo transport, tool storage, subsea operation, waste handling, equipment mounting or offshore service work.

2. Dimensions

Confirm external dimensions, internal usable space and any restrictions from vessel deck, platform layout or transport route.

3. Payload and Tare Weight

The supplier needs to know the maximum cargo weight, unit self-weight and total lifting weight. This affects frame design, pad eyes, sling set and testing.

4. Lifting Method

Confirm whether the unit will be lifted by crane, forklift, spreader frame or special handling equipment. Offshore lifting points must be designed carefully.

5. Center of Gravity

For DNV 2.7-3 portable offshore units, the center of gravity is especially important because installed equipment may create uneven loading.

6. Cargo Type

Long pipes, ROV tools, chemical tanks, gas bottles and heavy machinery all require different securing methods and structural design.

7. Offshore Environment

Confirm marine corrosion level, temperature range, hazardous area classification, fire-rating needs and whether the unit will be used on deck, platform or vessel.

8. Certification and Documentation

Ask what documents are required by the project owner, vessel operator or end user. Typical documents may include drawings, material certificates, test reports, inspection records and DNV-related certification documents.

Common Mistakes to Avoid

One common mistake is using “DNV certified” as a general phrase without confirming the exact standard. DNV 2.7-1 and DNV 2.7-3 are not interchangeable.

Another mistake is choosing only by size. For offshore projects, payload, lifting points, cargo type and operating conditions are often more important than the container length.

A third mistake is ignoring future inspection and maintenance. Offshore units are exposed to salt spray, impact, vibration and repeated lifting, so design quality and documentation should be considered from the beginning.

FAQ

Is DNV 2.7-1 only for containers?

It is mainly used for offshore containers and cargo carrying units, including baskets, skips, racks and other transport units.

Is DNV 2.7-3 better than DNV 2.7-1?

Not necessarily. It depends on the application. DNV 2.7-1 is suitable for offshore cargo transport, while DNV 2.7-3 is more suitable for portable offshore equipment units.

Can one product meet both DNV 2.7-1 and DNV 2.7-3?

Some offshore units may involve requirements from both areas, depending on their structure and use. The final certification scope should be confirmed during engineering review.

What information should I provide for a quotation?

Provide application, size, payload, tare weight target, cargo type, lifting method, operating environment, required certification and any project-specific drawings or specifications.

Conclusion

DNV 2.7-1 and DNV 2.7-3 serve different offshore needs. If your priority is safe cargo transport, DNV 2.7-1 is usually the right direction. If the unit is a portable offshore equipment package with installed systems or special functions, DNV 2.7-3 may be required.

Magindustry provides DNV-certified offshore containers, baskets, skids and customized offshore modules for demanding marine environments. To discuss your project, visit Magindustry Offshore Cargo Carry Units or contact Magindustry.