An offshore-certified container is not automatically suitable for a hazardous area. Offshore container certification, hazardous-area protection and fire resistance address different risks. A buyer must verify the scope of each approval against the intended location, equipment and operating conditions.
For example, a container may have evidence supporting offshore lifting while its internal electrical installation has no assessed protection for an explosive atmosphere. The lifting evidence remains useful, but it does not answer the hazardous-area question.
What does offshore container certification establish?
DNV-ST-E271, commonly referred to as DNV 2.7-1, addresses offshore containers and their lifting sets, including design, manufacture, testing and inspection. Read the actual certificate and associated documentation to identify the unit and approved scope.
A statement that a unit is “designed to” a standard is different from a certificate issued for the applicable unit or design. Check the issuer, identification, limitations and inspection records. Do not infer certification from a logo, a drawing note or the appearance of the lifting frame.
Structural and handling evidence should be reviewed alongside the requirements for the module's installed function.
What information defines hazardous-area suitability?
Start with the site's hazardous-area classification and intended application. Provide the zone, relevant gas or dust hazards, required equipment protection level or category, temperature requirements and ambient conditions.
DNV's IECEx certification guidance explains the relationship between equipment protection levels or ATEX categories and suitable zones. The applicable regulatory and acceptance route also depends on the project location.
“Zone 2” alone is an incomplete equipment specification. The proposal must also address the relevant substance group, temperature limitations, installation conditions and the protection method selected for the equipment or room.
Tell the supplier whether the process introduces a flammable substance inside the container. An external hazardous atmosphere and an internal release create different design questions.
How can pressurisation protect equipment inside a container?
Room pressurisation can form part of an engineered protection strategy by limiting ingress of the surrounding hazardous atmosphere. Its suitability depends on the room arrangement, protective air supply, monitoring and safety actions.
IEC 60079-13 addresses rooms protected by pressurisation and artificial ventilation within its defined scope. The project should identify the applicable edition and any local adoption or additional requirements.
Useful procurement questions include where protective air is drawn from, how pressure is monitored, whether purging is required and what happens when protection is lost. The answers belong in the approved control philosophy and cause-and-effect documentation.
A fan or a positive-pressure reading alone does not demonstrate a complete protection system. Detection, alarms, interlocks, shutdown actions and any equipment that must remain energised need to be considered together.
Does an A60 fire rating mean explosion protection?
No. A60 concerns fire resistance under the applicable marine fire-test framework. It does not, by itself, establish suitability for an explosive atmosphere or resistance to blast loading.
The IMO 2010 FTP Code provides the relevant marine fire-test framework. Evidence must match the construction and installation being supplied, including applicable doors, windows, ducts, penetrations and joints.
Avoid treating separate labels as interchangeable: offshore handling, fire resistance, hazardous-area protection and any specified blast resistance each need an appropriate design basis and evidence.
Which documents should a buyer request?
Ask for a project-specific documentation schedule before order placement. Depending on scope, it should identify:
- Container and lifting-set certification and identification.
- Hazardous-area design basis and applicable certification or conformity documents.
- Equipment schedule with protection markings and certificate references.
- Conditions or limitations attached to certificates.
- Pressurisation, ventilation, detection and shutdown documentation.
- Fire-resistance evidence for the specified assemblies.
- Factory test plan, installation instructions and site inspection requirements.
Certificates for individual components do not establish acceptance of the complete installed module. Ask who assesses the assembled system and who verifies its connection to the host facility.
Frequently asked questions
Can a container with offshore lifting certification be used in Zone 1?
Only if the complete proposed arrangement also satisfies the applicable Zone 1 requirements and project approval conditions. Lifting certification alone is insufficient.
Is an ATEX or IECEx certificate enough for every project?
Check its scope, conditions, equipment identity and acceptance under the applicable local rules. A component certificate does not replace installation assessment.
Does every electrical item inside a pressurised room need the same Ex protection?
The approved protection concept determines equipment selection and permitted operating conditions. Items that remain energised when room protection is lost require specific consideration.
Discuss Your Hazardous Area Container with TLS
TLS pressurised container solutions support project-specific offshore and hazardous-area applications. Send the intended function, area classification, equipment list, host interfaces and approval requirements to sales@tls-containers.com so the proposed configuration and documentation scope can be reviewed together.
