Direct Answer

An offshore reefer container should be selected according to the cargo type, target temperature, transit duration, airflow requirements, power supply and offshore lifting conditions. The refrigeration unit’s temperature range alone is not enough, because actual cargo temperature is also affected by pre-cooling, loading density, door openings and power interruptions.

TLS offshore reefer containers can be used for fruit, vegetables, dairy products, meat and other temperature-sensitive cargo. Depending on project requirements, they can be fitted with Daikin, Carrier or Thermo King refrigeration equipment. TLS product information lists a typical temperature range of −20°C to +25°C, with options including forklift pockets, door curtains, shelving and customised internal layouts. DNV 2.7-1, EN 12079 and CSC requirements can also be considered according to the transport and lifting method.

 What Is the Difference Between an Offshore Reefer and a Standard Reefer Container?

Key conclusion: A standard reefer container should not be used as an offshore lifting container unless its structure, lifting arrangement and certification have been verified for that application.

What Five Factors Should Be Confirmed Before Selection?

1. Cargo Requirements

Specify the cargo type, packaging, weight, target cargo temperature, permitted variation and transit duration. Pharmaceuticals, chemicals and dangerous goods may be subject to additional regulations; container certification alone does not confirm suitability for these cargoes.

2. Pre-Cooling Condition

A reefer container is generally intended to maintain cargo that has already reached its required temperature. The refrigeration setpoint is not the same as cargo core temperature, so cargo temperature should be checked before loading.

3. Airflow and Fresh-Air Exchange

Cargo must not block the supply-air or return-air paths. Fresh fruit and vegetables respire, producing heat, moisture and carbon dioxide, and may therefore require fresh-air exchange. Settings intended for fresh produce should not be applied automatically to frozen cargo.

4. Power Supply and Monitoring

Ports, vessels, vehicles and offshore platforms may use different power arrangements. Confirm the voltage, frequency, plug type, backup power, temperature recording and abnormal-condition alarms across the entire transport route.

5. Structure and Certification

DNV 2.7-1 and EN 12079 primarily address offshore-container structure and safe lifting, while CSC primarily relates to container transport safety. None of these requirements independently verifies temperature uniformity or cargo condition.

What Information Does TLS Need for a Quotation?

- Cargo type, packaging, weight and loading method;

- Target temperature, permitted variation and fresh-air requirements;

- Transport route, transit duration and ambient temperature;

- Power supply, plug type, backup power and monitoring interfaces;

- Dimensions, payload and maximum gross-weight limits;

- DNV 2.7-1, EN 12079, CSC or other applicable requirements;

- Required shelving, door curtains, forklift pockets and alarm options;

- Quantity, delivery location and required delivery date.

Frequently Asked Questions

1. What is the typical temperature range of a TLS offshore reefer container?

TLS product information lists a typical temperature range of −20°C to +25°C. The final operating range depends on the refrigeration unit, ambient conditions, container size and cargo requirements, and should be confirmed in the approved project data sheet.

2. Is the refrigeration setpoint the same as the actual cargo temperature?

No. The controller measures temperature at a defined supply-air or return-air location. Cargo core temperature may respond more slowly and is also affected by pre-cooling and airflow through the load.

3. Does a temperature data logger prove that the cargo remained compliant?

Not by itself. A data logger records the temperature at its measurement point. For high-risk cargo, probe position, calibration, initial cargo temperature and multi-point temperature distribution may also need to be considered.

4. Does DNV 2.7-1 certify refrigeration performance?

No. DNV 2.7-1 primarily addresses offshore-container structure and lifting. Refrigeration capacity and temperature uniformity must be verified separately.

Conclusion

The reliability of an offshore reefer container depends on correct selection, cargo pre-cooling, proper loading, continuous power and temperature monitoring. Procurement specifications should define both the cold-chain conditions and offshore lifting requirements, rather than comparing only refrigeration brands or minimum setpoint temperatures.

TLS Offshore Containers / TLS Energy is a global supplier of standard and customised containerised solutions. 

Wherever you are in the world, TLS can help you. Please contact us.

Direct Answer

When selecting an offshore accommodation module, first define the number of occupants, installation location, fire-protection requirements, offshore lifting conditions and platform interfaces. Size and bed capacity alone are not sufficient selection criteria.

TLS provides customised accommodation, office, galley, mess and sanitary modules. TLS accommodation modules can be configured for 1–8 people, with options including beds, storage lockers, en-suite bathrooms, hot-water systems, air conditioning, workspaces, fire and gas detection, and quick connection to platform services. Depending on the project scope, modules can be engineered to meet requirements such as DNV 2.7-1, EN 12079, A60 fire rating or applicable ABS guidelines.

How Is an Offshore Accommodation Module Different from a Standard Portable Building?

An offshore accommodation module must provide a suitable living environment while also supporting offshore transport, lifting, deck installation, exposure to salt-laden air and emergency evacuation.

Key conclusion: A standard land-based portable building should not be used as offshore accommodation unless its structure, fire safety and lifting arrangements have been verified for the intended offshore application.

What Five Factors Should Be Confirmed Before Selection?

1. Occupancy and Function

Define the normal occupancy, shift pattern and required functions, such as sleeping, office, dining and sanitary areas. Bed capacity must also account for evacuation routes, storage, cleaning access and maintenance space.

2. Fire Protection and Certification

DNV 2.7-1 and EN 12079 primarily address the design, manufacture, testing and safe lifting of offshore containers. An A60 rating addresses the fire integrity and insulation performance of an approved division. These requirements serve different purposes and must be specified separately for each project.

3. HVAC

Heating, ventilation and air-conditioning should be designed around occupancy, outdoor temperature and humidity, fresh-air demand, internal heat loads and noise limits. Sanitary areas also require appropriate extraction to prevent odours from entering occupied spaces.

4. Platform Interfaces

Confirm the interfaces for power, communications, water supply, drainage, hot water, fire alarms and public-address or general-alarm systems. Factory-installed equipment reduces onsite work, but it does not eliminate connection, integration and testing after delivery.

5. Installation and Module Connection

TLS modules can be supplied with twist locks, deck-mounting pads and module-linking kits. Stacked or connected arrangements still require project-specific review of deck loads, structural connections, fire boundaries and escape routes.

What Information Does TLS Need for a Quotation?

- Project type, module function and number of occupants;

- General arrangement, dimensions and weight limits;

- Installation location, environmental conditions and hazardous-area classification;

- DNV, EN 12079, A60, ABS or other applicable requirements;

- HVAC, furniture, sanitary and fire-safety configurations;

- Platform utility and control-system interfaces;

- Required quantity, delivery location and delivery schedule.

Frequently Asked Questions

1. Can an A60 accommodation module be installed directly in a Zone 2 area?

Not automatically. A60 addresses fire protection, while Zone 2 classification addresses ignition risks in a potentially explosive gas atmosphere. Pressurisation, hazardous-area electrical equipment and loss-of-pressure shutdown logic must be assessed separately.

2. How many people can one offshore accommodation module house?

TLS offers customised accommodation solutions for 1–8 people. Final capacity depends on module dimensions, bed layout, sanitary facilities, evacuation space and project approval requirements.

3. Can multiple accommodation modules be connected?

Yes. However, the combined arrangement must be reviewed as one system for structural connections, fire zones, evacuation, HVAC, water and drainage, and platform interfaces.

4. What is the most important information to provide before requesting a quotation?

The essential inputs are the occupancy and function schedule, general arrangement, installation environment, certification requirements and platform interfaces. Clear project data enables a more accurate technical proposal and quotation.

Conclusion

Selecting an offshore accommodation module means balancing personnel needs with offshore lifting, fire safety and platform integration. Define the occupancy, functions and installation conditions first; then determine the module dimensions, certification scope and internal configuration.

Contact TLS Offshore Containers to request a preliminary technical review or quotation.

Further product information:

• TLS 20ft offshore accommodation container brochure

• TLS ABS-approved offshore accommodation module brochure

Summary

An offshore accommodation container is a purpose-engineered living module that combines an offshore-capable structure with fire protection, climate control, sanitary facilities, utilities and personnel amenities. Selecting one should begin with the host facility, occupancy, installation location, fire boundary, environmental conditions and required approvals - not with container size alone.

TLS offers accommodation solutions ranging from compact 20ft units with two private rooms and a shared bathroom to larger, linkable multi-person modules. The final specification, certification scope and installed systems are determined by the requirements of each project.

What Is an Offshore Accommodation Container?

An offshore accommodation container is a transportable module designed to provide living or support space on offshore platforms, vessels, barges and other marine facilities. Depending on the layout, it may serve as a sleeping cabin, office, changing room, recreation room, mess module or another occupied space.

It is not simply a shipping container fitted with beds. A suitable offshore accommodation module must address several functions as one system:

• structural strength for transport, lifting and installation;
• the fire integrity required at the intended location;
• heating, cooling and ventilation;
• electrical, communication and alarm interfaces;
• freshwater, grey-water and black-water connections;
• safe access, escape and internal circulation;
• furniture and sanitary arrangements suitable for the stated occupancy; and
• compatibility with the host platform or vessel.

These requirements are interdependent. For example, a ventilation penetration can affect a fire-rated boundary, while an internal layout can affect escape routes, maintenance access and utility routing. The module therefore has to be engineered as a complete occupied space.

Which Standards and Approvals May Apply?

The applicable compliance package depends on the host facility, flag or coastal-state requirements, installation location and project specification. Buyers should define the required approval basis before detailed design.

DNV 2.7-1 and EN 12079

DNV-ST-E271, commonly referred to as DNV 2.7-1, provides requirements for the approval and certification of offshore containers and their lifting sets. It addresses matters such as design, manufacturing, testing, marking and inspection. EN 12079 is also commonly specified for offshore containers.

These standards are important for offshore handling and structural certification, but they do not by themselves define every habitability, fire, electrical or host-installation requirement for an accommodation module.

ABS approval for portable accommodation modules

For modules intended for installation on ABS-classed vessels or offshore units, the ABS Guide for Portable Accommodation Modules may form part of the approval basis. Its scope covers the design, construction, installation and survey of accommodation modules, including structural, piping, electrical, ventilation, fire-integrity, layout and placement considerations.

TLS has developed ABS-approved accommodation module configurations. Approval should nevertheless be confirmed against the exact module design, host facility and project scope being purchased.

A-60 fire protection

Where an A-60 boundary is required, fire performance depends on the tested assembly, not on insulation material alone. Bulkheads, decks, doors, penetrations, ventilation openings, dampers and joints must be treated as part of the complete fire-protection arrangement.

An A-60 designation refers to integrity and insulation performance under the applicable prescribed fire-test conditions for 60 minutes. It should not be used as a general claim that a module is suitable for every fire scenario. The required fire rating and the boundaries to which it applies must be established from the project fire-safety plan.

Maritime Labour Convention considerations

Where the Maritime Labour Convention, 2006 applies, the host vessel's accommodation arrangements may need to address room dimensions, heating and ventilation, noise and vibration, sanitary facilities, lighting and other factors that affect seafarers' health and well-being. Compliance is determined within the context of the vessel, flag administration and applicable inspection regime; it should not be inferred solely from the supply of a standalone module.

What Can a 20ft TLS Offshore Accommodation Container Include?

One TLS 20ft configuration uses two independent single-person rooms with a shared bathroom. The brochure identifies the following nominal dimensions:

• external: 6,058 mm long, 2,438 mm wide and 2,896 mm high;
• internal: 5,528 mm long, 2,332 mm wide and 2,716 mm high.

The illustrated configuration includes a bed, wardrobe, desk, chair, lighting, sockets, TV bracket and data/telephone/TV interfaces in each room. The central bathroom includes a toilet, washbasin, shower and mirror.

Depending on the agreed specification, the module may also incorporate:

• A-60 insulation and self-closing A-60 doors;
• marine coating and anti-slip PVC flooring;
• heating and cooling air-conditioning;
• bathroom mechanical exhaust with fire dampers;
• distribution equipment, lighting, switches and external electrical interfaces;
• flame-retardant marine/offshore cabling;
• pre-wiring for fire alarm, sensing, public-address or communication systems; and
• freshwater inlet plus grey-water and black-water outlets.

The brochure describes construction materials intended for environments from -30 degrees C to +70 degrees C. This range should be treated as a design input to confirm for the specific unit and project. HVAC capacity, electrical ratings, equipment selections and guaranteed internal conditions must be checked against the actual ambient temperature, solar load, occupancy and host utilities.

When Is a Larger Linkable Module More Suitable?

A larger accommodation module may be preferable when a project requires higher occupancy, en-suite sanitary spaces or a multi-module accommodation block.

One TLS ABS-approved reference design is approximately 9,800 mm long, 3,400 mm wide and 3,048 mm high, with a stated weight below 17.5 tonnes. The illustrated arrangement accommodates up to eight people in two rooms and provides wet-unit facilities. It includes features such as bunks, lockers, workspaces, HVAC, fire and gas detection, sprinklers, emergency lighting, PAGA connections and utility interfaces.

The design also demonstrates how modules can be connected by structural, mechanical and architectural linking kits. An internal central corridor can allow personnel to move between linked modules without repeatedly entering the open deck environment. ISO corner blocks, deck-mounting pads and twist locks assist installation, while the lifting arrangement is engineered for offshore handling.

Stacking or linking must never be assumed from appearance alone. The permitted number of tiers, occupancy condition, host motions, deck loads, sea-fastening arrangement, wind criteria, lifting set and approval basis must all be verified for the selected design and installation.

What Should Buyers Define Before Requesting a Quotation?

A useful enquiry should describe how and where the module will operate. At minimum, the supplier needs the following information:

1. Host facility and location: vessel, fixed platform, floating installation, barge or onshore site, together with the intended installation area.
2. Service and occupancy: sleeping, office, recreation or mixed use; number of occupants; single beds or bunks; and expected occupancy duration.
3. Module arrangement: 20ft or custom dimensions, room layout, bathroom configuration, linking requirements and proposed stacking level.
4. Certification basis: DNV 2.7-1/EN 12079, ABS, CSC, flag requirements, client specifications and any other stated approval.
5. Fire and hazardous-area requirements: required fire rating, fire-boundary locations, area classification and external-equipment requirements.
6. Design environment: minimum and maximum ambient temperatures, humidity, salt exposure, wind, host motions and any project-specific corrosion system.
7. Electrical interfaces: incoming voltage, frequency, socket standard, load schedule, earthing philosophy and connection type.
8. HVAC and ventilation: occupancy, heat load, redundancy, fresh-air requirement, bathroom extraction and external design conditions.
9. Safety and communications: fire and gas interfaces, PAGA, telephone, network, TV, emergency lighting, detectors and shutdown philosophy.
10. Plumbing interfaces: freshwater and seawater requirements, water heating, drainage, pipe sizes, connection locations and host-system conditions.
11. Transport and installation: lifting restrictions, maximum weight, deck loading, tie-down method, access route and available installation equipment.
12. Documentation and testing: drawing list, calculations, certificates, inspection points, FAT scope and delivery documentation.

Providing these inputs early allows the structure, layout and utilities to be developed together and reduces late changes during approval or site installation.

Frequently Asked Questions

Does every offshore accommodation container need DNV 2.7-1 certification?

Not automatically. The required certification depends on how the module will be transported, lifted, installed and operated, as well as the requirements of the host facility and project. DNV 2.7-1 is widely specified for offshore containers and lifting sets, but the complete compliance basis must be agreed for each application.

Does an A-60 door make the whole module A-60 rated?

No. Fire performance applies to a complete tested or approved assembly. Doors, walls, floors, ceilings, penetrations, dampers and connection details must all preserve the required boundary performance.

Can offshore accommodation modules be stacked and linked?

Yes, if the selected design and installation arrangement are approved for that purpose. Stacking capacity, occupancy during operating conditions, module connections, deck loads, access and escape routes must be verified rather than assumed.

Can TLS customize the internal layout?

Yes. Layouts can be developed for different occupancy levels and functions, subject to structural, fire, escape, habitability, utility and approval constraints. Typical options include single-person rooms, bunk rooms, en-suite or shared bathrooms, offices and linked accommodation blocks.

What is the most important first step when selecting a module?

Define the host facility, occupancy, installation location and approval basis before choosing a size or furniture arrangement. These inputs determine the structural, fire, hazardous-area and utility requirements that shape the entire module.

Request a Project-Specific Accommodation Module Review

TLS Offshore Containers supplies standard and customized containerized solutions for offshore and industrial applications. To discuss an accommodation module, send TLS your intended occupancy, preferred layout, installation location, required certification, ambient conditions, electrical supply, utility interfaces and target delivery schedule.

Contact TLS Offshore Containers to request a preliminary technical review or quotation.

Further product information:

• TLS 20ft offshore accommodation container brochure

• TLS ABS-approved offshore accommodation module brochure