In offshore operations, container certification influences far more than compliance paperwork. The selected standard affects engineering requirements, fabrication controls, inspection expectations, project approvals, and whether a unit will be accepted across different offshore environments.
Two standards frequently appear in offshore container projects: DNV 2.7-1 and EN 12079. Both govern offshore containers used for repeated lifting and transport between vessels, offshore installations, and shore bases. However, they differ in origin, certification framework, inspection approach, and typical industry use.
Understanding those differences early can help manufacturers, operators, and procurement teams avoid certification delays, redesign costs, or project approval issues.
DNV 2.7-1 vs EN 12079 — Key Differences
| Attribute | DNV 2.7-1 | EN 12079 |
| Issuing body | DNV | CEN |
| Geographic acceptance | Widely used globally | Strong European presence; also used in some international contexts |
| Primary industry use | International offshore projects | European and established offshore operations |
| Inspection approach | Strong surveyor / classification participation commonly expected | Depends on certification route and project framework |
| Certification framework | DNV certification or classification-based compliance approach | May involve classification societies, certification bodies, or project-specific routes |
| Material traceability | Highly structured documentation and traceability expectations | Required under the standard framework |
| Periodic inspection | Inspection and examination requirements defined within DNV 2.7-1 framework | EN 12079 Part 3 requirements |
| Current industry status | Widely used global offshore standard | Active standard; ISO 10855 increasingly referenced in some projects |
For many projects, the practical distinction comes down to oversight expectations, operator requirements, and certification strategy rather than major differences in core engineering intent.
What Are DNV 2.7-1 and EN 12079?
EN 12079 is a European standard developed through CEN (European Committee for Standardization). It establishes requirements for offshore container design, manufacturing, testing, lifting sets, and periodic inspection.
DNV 2.7-1, issued by DNV, is a widely used offshore container standard across international offshore projects. DNV 2.7-1 and EN 12079 share substantial technical commonality and evolved alongside offshore container industry practice, but DNV 2.7-1 is often associated with stronger classification oversight and survey participation during approval and manufacturing activities.
DNV 2.7-1 Requirements and Scope
DNV 2.7-1 addresses the design, manufacture, testing, marking, and certification of offshore containers intended for offshore lifting operations. Typical requirements include:
- Structural design calculations for offshore lifting loads
- Fabrication and welding requirements using approved procedures
- Material traceability and documentation controls
- Load testing and non-destructive testing (NDT) verification
- Surveyor or classification oversight during key project stages
- Container marking, data plates, and certification documentation
- Inspection and examination requirements throughout the operational lifecycle
One reason DNV 2.7-1 remains prominent in international offshore projects is its emphasis on documented compliance, traceability, and oversight throughout engineering, fabrication, and testing.
EN 12079 Requirements and Scope
EN 12079 is organized into multiple parts covering different aspects of offshore container compliance.
- Part 1 — Design, Manufacturing and Marking establishes requirements for structural design, fabrication, and testing procedures.
- Part 2 — Offshore Lifting Sets addresses sling assemblies, lifting components, and safe lifting arrangements.
- Part 3 — Periodic Inspection and Examination defines inspection intervals, repair expectations, maintenance requirements, and continued operational compliance.
EN 12079 continues to have a strong European presence and is also referenced within certain international operations and existing offshore fleets.
Which Standard Does Your Project Need?
The answer depends on project geography, client specifications, operational environment, and certification expectations.
| Project Scenario | Commonly Preferred Standard |
| International / global offshore project | DNV 2.7-1 |
| European project with existing EN 12079 fleet | EN 12079 or ISO 10855 |
| Project requiring classification oversight | DNV 2.7-1 often preferred |
| New offshore container project | DNV 2.7-1 or ISO 10855 |
| North Sea / UKCS / NCS operations | Depends on operator requirements |
In practice, operator specifications often override general market preference. Some clients mandate a specific compliance route, classification society involvement, or regional standard alignment from the outset.
Can You Certify to Both Standards at the Same Time?
Yes. Dual certification is possible in many offshore container projects.
Because DNV 2.7-1 and EN 12079 share substantial technical overlap, containers may be engineered and documented to satisfy both frameworks where project requirements justify it. This can support greater operational flexibility for fleets serving multiple operators or geographic markets.
The feasibility of dual certification depends on the chosen approval pathway, project scope, and certification requirements.
What the Offshore Container Certification Process Looks Like
Although workflows vary by project and certifying authority, offshore container certification commonly follows a structured process:
- Design submission and engineering review
- Material verification and fabrication approval
- Manufacturing under required oversight or survey participation
- Load testing and NDT verification
- Marking, data plate installation, and certification documentation
- Periodic inspection, examination, and ongoing compliance activities
Early alignment on the applicable standard can streamline approval timelines and reduce the risk of compliance gaps during fabrication or inspection.
Is EN 12079 Being Replaced by ISO 10855?
ISO 10855 has become increasingly referenced across parts of the offshore industry and draws on principles associated with both EN 12079 and established offshore container practice.
However, the shift is not uniform. Many operators and projects continue to specify DNV 2.7-1, EN 12079, ISO 10855, or operator-specific combinations depending on regional requirements, internal specifications, and fleet history.
EN 12079 remains an active and relevant standard, while DNV 2.7-1 continues to be widely used across international offshore projects.
Frequently Asked Questions
- Does DNV 2.7-1 certification automatically include EN 12079 compliance?
Not automatically in every case. Although the standards share significant technical commonality, compliance depends on project scope, certification basis, and approval requirements.
- Can any certification body certify EN 12079?
Certification approaches can vary depending on project requirements and applicable compliance frameworks, including routes involving recognized certification or classification organizations.
- Is EN 12079 still valid in 2025/2026?
Yes. EN 12079 remains an active and recognized offshore container standard.
- What is the difference between DNV 2.7-1 and DNV-ST-E271?
DNV 2.7-1 specifically addresses offshore containers. DNV-ST-E271 is a broader DNV standard framework associated with offshore containers and portable units within a DNV standards structure.
- Is DNV 2.7-1 accepted in European waters?
It is widely used internationally and may be accepted in European operations, subject to operator, regional, and project requirements.
- Can a container certified to EN 12079 be upgraded to DNV 2.7-1?
Potentially, depending on the container’s design basis, inspection history, technical documentation, and any compliance gaps identified during assessment.
- Can offshore containers be dual-certified?
Yes. Dual certification is used in some projects to support broader operational acceptance and fleet flexibility.
References: https://www.tls-containers.com/uploads/1/1/3/0/11305885/en12079-2006_for_offshore_containers.pdf
