Direct Answer

DNV-ST-E271 (commonly referenced as DNV 2.7-1), EN 12079, A60 and IEC 60079-13 address different risks and are not interchangeable:

• DNV-ST-E271 / DNV 2.7-1 addresses the approval and certification of offshore containers and their lifting sets.
• EN 12079 addresses offshore-container design, construction, testing, inspection and marking.
• A60 is a passive fire-protection classification for an approved bulkhead, deck, door or other division; it does not certify lifting or explosion protection.
• IEC 60079-13 addresses rooms protected by pressurisation or artificial ventilation in or around explosive atmospheres.

 An offshore pressurised laboratory may need all four requirements because it must be safe to lift, structurally suitable for offshore service, fire-rated where required and protected for the specified hazardous area. The project must define the applicable edition, certification body, protected boundaries and required evidence for each requirement.

What Does Each Requirement Cover?

Key conclusion: A certificate is valid only for its stated product, boundary, edition and scope. A list of standard names is not a compliance strategy.

Is “DNV 2.7-1” Still the Correct Name?

The current DNV standard is titled DNV-ST-E271 2.7-1 Offshore Containers. DNV states that it covers approval and certification requirements for offshore containers and lifting sets, including manufacture, testing, marking and periodic inspection. “DNV 2.7-1” remains widely used in enquiries and project documents, but the contract should identify the exact standard designation, edition and amendments required.

This matters because a generic statement such as “DNV container” does not define:

• whether the container or the lifting set is included;
• whether certification is by DNV or conformity is assessed by another accepted body;
• which edition and amendments apply;
• whether the approval covers a single unit, a type design or production surveillance;
• what inspection is required after modification or during service.

What Does EN 12079 Add?

EN 12079 is commonly specified with an offshore-container project because it addresses transport-related design, construction, testing, inspection and marking. The applicable parts and edition should be stated rather than using “EN 12079 compliant” as a general label.

For a functional container, such as a laboratory, workshop or control cabin, EN 12079 does not approve the internal process. Ventilation, chemical handling, electrical distribution, ergonomics and emergency systems require separate design and acceptance criteria.

What Does an A60 Rating Mean?

An A60 rating applies to an approved fire division, not automatically to every part of a complete module. Under the IMO fire-test framework, an A-class division must resist smoke and flame through the one-hour standard fire test. For A60, the insulation limits also apply for 60 minutes.

The project should identify:

1. which walls, roof, floor, doors, windows, dampers and penetrations form the A60 boundary;

2. the permitted insulation, joint and fixing construction;

3. how cable transits, pipe penetrations and ventilation openings preserve the rating;

4. whether the orientation and dimensions are within the approval scope;

5. which certificates and installation records must be included in the final dossier.

Common error:Specifying “A60 insulation” is not the same as specifying an approved A60 division. The complete tested or approved construction, including penetrations and closures, must be considered.

When Does IEC 60079-13 Apply?

IEC 60079-13:2017 covers the design, construction, assessment, verification and marking of rooms protected by pressurisation or artificial ventilation. Its scope includes rooms in Zone 1 or Zone 2 and configurations with or without internal sources of release, subject to the protection method defined by the standard.

For a pressurised offshore container, the design normally needs to define:

• the external hazardous-area classification;
• any internal source of flammable gas or vapour;
• the source and location of protective air;
• the purge sequence before protected equipment is energised;
• minimum pressure or airflow conditions;
• alarms and automatic actions after loss of pressure or ventilation;
• fire-and-gas detector locations and voting logic;
• which equipment remains energised during an abnormal condition;
• interfaces with platform F&G, ESD and alarm systems.

IEC 60079-13 does not itself establish acceptable temperature, toxicity or general air quality for personnel. Those requirements must be addressed separately by the project.

Does a Zone 1 or Zone 2 Container Need Ex Equipment Inside?

Not every internal item must automatically carry the same Ex rating when a room is protected by a valid pressurisation concept. The answer depends on the protection type, the external zone, internal sources of release, purge and interlock logic, and the approved design.

External equipment exposed to the hazardous area—such as fans, detectors, lights, isolators or emergency-stop devices—must be selected for the actual gas group, temperature class, equipment protection level and environmental conditions. The hazardous-area schedule and certification review should determine the final equipment list.

What Should a Procurement Specification State?

A usable enquiry should define at least:

• module function and whether personnel will occupy it;
• installation location and external hazardous-area classification;
• internal sources of gas, vapour, dust or chemicals;
• required DNV-ST-E271 / DNV 2.7-1 and EN 12079 scope and edition;
• required A0/A60 boundaries, including doors and penetrations;
• IEC 60079-13 protection method and project-specific cause-and-effect logic;
• ATEX, IECEx or other jurisdictional conformity requirements;
• gas group, temperature class and ambient design range;
• third-party approval body and witness points;
• FAT, documentation, lifting-set and final certification requirements.

FAQ:

1. Does DNV-ST-E271 certify a container for Zone 2?

No. DNV-ST-E271 addresses offshore containers and lifting sets. Hazardous-area classification, pressurisation and Ex equipment require separate assessment against the applicable project and explosion-protection requirements.

2. Does A60 mean the container is explosion-proof?

No. A60 is a passive fire-protection classification. Explosion protection depends on hazardous-area design, ignition-source control, pressurisation or ventilation, suitable equipment and safety interlocks.

3. Can a CSC container be lifted offshore?

CSC approval alone does not establish suitability for offshore lifting in open-sea conditions. The structure, lifting set and certification must be verified for the intended offshore operation.

4. Can one certificate cover the complete module?

Usually the final compliance dossier contains several documents because structure, lifting, fire divisions, Ex equipment, pressurisation controls and installed systems have different approval routes. The document index should map every requirement to its certificate, drawing or test record.

5. Which standard should be written first in the enquiry?

Start with the module’s function, operating environment and hazards. Standards should then be assigned to specific risks and systems. Beginning with an unexplained list of standards often creates overlaps, omissions and commercial assumptions.

Conclusion

Offshore-container compliance is a set of coordinated approvals, not a single certificate. DNV-ST-E271 and EN 12079 address offshore transport and lifting-related requirements; A60 addresses fire divisions; IEC 60079-13 addresses pressurised or artificially ventilated rooms. A reliable specification assigns each requirement to a defined boundary, edition, approving body, and acceptance document.

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