Summary
The DNV 2.7-1 standard is vital for ensuring the safety and reliability of offshore containers, particularly those designed for refrigeration units.
Developed by DNV (Det Norske Veritas), this standard outlines stringent requirements related to the design, construction, materials, testing, and inspections of offshore containers to ensure their durability in harsh marine conditions.
Offshore reefer containers certified under this standard, such as the ICEWAVE and ICE STORM units, are equipped with advanced temperature management systems, making them ideal for transporting perishable goods while minimising spoilage and ensuring compliance with regulatory requirements in offshore logistics.
When it comes to offshore oil and gas business, DNV Certified is a very common term. Even more so when it comes to purchasing an offshore reefer container.
As it is a very technical term, most offshore reefer purchasers do not take the DNV certification into account. This article explains what you should look out for when it comes to DNV Certification, what certification is needed for offshore reefer containers and more.
Introduction
When it comes to purchasing an offshore reefer container, the DNV 2.7-1 certification is a critical standard, particularly for businesses in the oil and gas industry.
As it is a very technical term, most offshore reefer purchasers do not take the DNV certification into account. Some may prioritise functionality over compliance, overlooking the importance of DNV 2.7-1 in ensuring safety, durability, and regulatory adherence.
This article explains what to look for in DNV Certification, what certification is needed for offshore reefer containers, and more.
What does DNV stand for?
DNV stands for Det Norske Veritas. Established in 1864, the shipping of goods and passengers was not reliable at that time. Therefore, a committee was formed to evaluate and regulate the classification of ships and to reduce uncertainties. The goal of DNV is to establish criteria that guarantee the safety of ocean-going vessels.
Previously, it was known as DNV GL as it was a joint classification with Det Norske Veritas (DNV) and Germainicher Lloyd (GL) to form the DNV GL Group. Since 2017, DNV GL has been working to phase away from the standalone name ‘DNV’ but it is still widely used to this day.
Why is it important to have a DNV certification?
DNV certification assures users and customers about the reliability and quality of the devices onboard ships. A DNV certification allows companies such as offshore reefer container providers to position themselves as a trusted player in the shipping industry and is a real asset.
Having DNV certification also gives customers, purchasers and users peace of mind as the certification ensures the reliability of the vessels.
What is an offshore reefer container?
Offshore reefer containers, also known as refrigerated containers, are used to transport goods and items that require temperature control during transit. Typically, products such as meat, fruit, vegetables and dairy are being shipped.
A reefer container is fitted with a refrigeration unit. This refrigerated unit is connected to an electrical power supply and can be supplied with warm or cold air through an air duct system.
The most essential component of an offshore reefer container is its temperature consistency. During long-distance transportation, temperature consistency helps keep goods fresh and prevent any spoilage.
What is a DNV 2.7-1 offshore reefer container?
The DNV classification refers to adherence to meeting Det Norske Veritas’s stringent standard, which ensures the quality, safety, and structural integrity of containers used in demanding environments.
This DNV 2.7-1 reefer container is specifically designed as a mobile unit capable of safely transporting goods and equipment with a maximum gross mass of not more than 25,000 kilograms across open seas, too, from, or between fixed and floating facilities and ships.
With DNV 2.7-1 certified, offshore reefer container is also used for offshore lifting that is designed for installation rather than repetitive transportation.
What is the difference between DNV 2.7-1 and DNV 2.7-3 certification for offshore containers?
According to DNVGL-ST-E273 Section 1.4.3, a POU (portable offshore unit) is a package or unit intended for repeated or single offshore transport and installation/lifting which may also be designed for subsea lifting.
Although the definitions of DN 2.7-1 and DNV 2.7-3 may seem to be similar, it’s important to understand their primary differences.
This is especially important for design engineers as the design approach is fundamentally different between the two standards.
DNVGL-ST-E271 adheres to a “design by code” philosophy, while DNVGL-ST-E273 followas “design by analysis” approach.
Design by code: DNV 2.7-1 containers
Design by code is a fairly straightforward process.
Basically, if the offshore container falls within specified categories, then you apply the designated design criteria.
The code’s inherent structure limits the design engineer’s subjective decision-making, which results in a more streamlined review process by DNVGL.
This results in a faster and less expensive design review cycle.
Design by analysis: DNV 2.7-3 containers
Design by analysis puts more responsibility on the design engineer for defining the design basis including limits of operation, load case scenarios, and selecting and/or defining proper acceptance criteria.
Since the design engineer assumes more ownership of the design process, the engineering review phase of the certification process is more in-depth and requires a longer review cycle, and is usually more expensive than the design review for 2.7-1.
What is the DNV 2.7-1 standard?
DNV 2.7-1 Standard for Certification was first published in May 1989 as “DNV Certification note 2.7-1 Offshore Freight Containers”.
It was prepared in accordance with other regulations at the time, whether international codes, national requirements, or rules published by Det Norske Veritas (DNV).
The Standard for Certification is concerned with the certification of all types of offshore containers as transport units.
The three typical phases of transport covered by the DNV 2.7-1 standard include:
- shoreside transport (e.g. by forklift truck)
- transport by a supply vessel
- lifting to and from offshore installations
The Standard for Certification includes design requirements related to all three phases.
Under conditions in which offshore containers are often transported and handled, the “normal” rate of wear and tear is high, and damage necessitating repair will occur.
However, containers designed and certified according to this Standard for Certification should have sufficient strength to withstand the harsh forces encountered in offshore operations, and not suffer complete failure even if subjected to more extreme loads.
How are offshore reefer containers tested?
Offshore containers need to be tested through specific methods to ensure that they are made up to spec, and safe to use.
Both DNV 2.7-1 and 2.7-3 are standard defining requirements and recommended practices covering the transport of offshore containers and portable offshore units.
The standards cover the specific areas of design, manufacturing, testing, certification, and periodic inspection.
Both standards cover the lifting frames of containers but, in most instances, not the equipment contained within the frames.
The requirements are defined based on safe use concerning:
- lives
- environment
- hazard to the vessel or offshore installation
Both standards cover aspects of the safe lifting and handling of these offshore containers and units between two floating vessels and between vessels and fixed or floating offshore installations.
What are the other certifications for offshore reefer containers?
Besides the DNV certification, there are 2 other popular certifications for offshore reefer containers.
These certifications are:
- ISO 10855: This international standard defines five requirements, including design, construction, inspection, testing, and in-service examinations of offshore containers and lifting sets, to ensure their safety and durability in marine environments.
- EN 12079: A European standard that specifies the design, testing, and production requirements for offshore containers to ensure they can withstand harsh offshore conditions.
Note that EN 12079 has been replaced by ISO 10855, which is now the globally recognised standard.
MGS offshore DNV 2.7-1 reefer containers
At MGS Offshore, the reefer containers offered are all DNV 2.7-1 certified, such as:
DNV 2.7-1 standard ICESTORM reefer containers
ICESTORM technology is not used anywhere else. The microprocessor controller integrates solid-state electronics and enormous processing power so that the refrigeration cycle is at its optimum at all times.
The microprocessor controls the fresh air exchange, records fresh air exchange data and ensures food and produce freshness. Certified with the DNV 2.7-1 standard, these offshore reefer containers are a testament to consistent product quality and protect against high and damaging levels of carbon dioxide level.
It also provides ventilation on demand, protecting the products being shipped as the ICESTORM reefer container provides venting in response to continuing changes in respiratory gases.
DNV 2.7-1 ICE WAVE reefer container
The DNV 2.7-1 certified ICE WAVE Reefer Container is designed so that produce and cargo reach their destinations at optimum temperature. The temperature distribution on this reefer container allows for quick regulation and recovery when doors are open and closed. This means that the temperature goes back to its optimal levels, keeping the shipment fresh.
With a temperature setting range of -30°C to +20°C, the hygienic and easy to clean DNV2.7-1 certified refrigerated container supports offshore heavy duty applications and has a high internal volume capacity of a maximum of 12.2cu.m.
Frequently Asked Questions (FAQs)
What materials are typically used in offshore containers to comply with DNV 2.7-1?
DNV 2.7-1 offshore containers are typically made from high-strength materials like carbon steel, carbon-manganese steel, or low-alloy steel to ensure durability, corrosion resistance, and structural integrity in harsh offshore environments.
These materials are chosen to withstand heavy loads, rough handling, and extreme marine conditions.
How often do offshore containers need to be inspected to meet DNV 2.7-1 standards?
Offshore containers must be inspected periodically, typically every 12 months, to meet DNV 2.7-1 standards. This inspection ensures that the containers remain compliant with safety and operational requirements.
Additionally, after any substantial repairs or modifications, a re-certification may be necessary.
What are the consequences of not meeting the DNV 2.7-1 inspection requirements?
Failing to meet DNV 2.7-1 inspection requirements can lead to several serious consequences, such as:
- Legal liabilities, fines, and penalties from regulatory authorities.
- Safety risks, including accidents, injuries, or environmental damage.
- Loss of certification, rendering the container unusable in offshore operations.
How does the DNV 2.7-1 compliance address the environmental impact of offshore containers?
The DNV 2.7-1 standard minimises the environmental impact of offshore containers by requiring durable, corrosion-resistant materials to reduce waste, leak-proof designs to prevent spills, and reusable construction for an extended lifespan.
It also ensures compliance with international environmental regulations, promoting sustainability and protecting marine ecosystems during offshore operations.
How does the DNV certification process differ from other standards?
DNV 2.7-1 containers implement a comprehensive approach, which includes detailed design reviews, extensive documentation requirements, and mandatory prototype testing for compliance.
It emphasises quality assurance through inspections during production and ensures that manufacturers adhere to strict safety and performance criteria.
Conclusion
The DNV2.7-1 certification has certainly reassured customers that the quality of goods during shipment is ensured to arrive in good condition.
From food and beverage industries to shipping meat, fresh produce, and dairy products and extending to oil & gas platforms, it is best to use a DNV Certified Offshore Reefer Container so that the goods do not spoil on the way during shipping.
For more information, download our the MGS DNV2.7-1 PDF file and check out ICEWAVE 8FT offshore reefer container and ICE STORM 10FT offshore container for purchases.
Business Director
A graduate (Business) from KDU, Jason Tan, is the current Business Director (Sales) for MGS Icestorm and has been associated with the company for the past 10 years.
With over 13 years in the shipping industry, he has had a significant contribution to Malaysia’s oil and gas industry in the engine and boat supply sector.
His expertise includes managing offshore catering business, offshore reefer containers, AI technology, offshore gas tanks, A60 pressurized cabins, etc. His contributions have helped establish MGS, in partnership (joint venture) with Thermo King and Honeywell to produce state of art Offshore Reefer Container products.