DNV Reefer Containers
Cargostore is the world’s largest supplier of DNV Reefer Containers (also called Refrigerated Containers). We supply a full range of DNV Reefers from the standard 20ft and 40ft to the DNV Dual Voltage Twin Room Reefer with global delivery. We also supply a wide range of ISO Refrigerated Containers.
Browse our range below or email us at email@example.com to discuss your project.
What Does Reefer Mean in Shipping?
A ‘Reefer’ in shipping terms is a portable refrigerated container. These can come in either standard ISO containers which are used on ships to transport frozen goods from one location to another, or in the higher certification standard of DNV 2,7-1. The DNV reefers are stronger and more robust so they can withstand being bumped on the side of ships and offshore platforms as they are transfered from ship to platform or ship to ship whilst out at sea.
Want to know more? Check out our article ‘What is a Reefer Container and how do they work?
Need to program your reefer container? We’ve got you covered in this handy programming guide.
How Are Reefer Containers Powered?
ISO and DNV reefer containers require three-phase alternating current (AC) power. That uninterrupted electricity supply must be provided by either:
- an external power source
- a clip-on generator (‘genset’) attached to the shipping container.
Cargostore is the world’s largest supplier of heavy-duty reefer containers built to the stringent DNV standard for challenging offshore working environments.
How Do Reefer Containers Work?
Without external power, reefer containers need power supplied short-term (one hour to three days) by a generator.
Cargostore gensets meet industry standards. They are 15KW, 18.75KVA, 460V AC, 3-Phase 60Hz with a:
- 130 US gallon (292-litre) fuel tank
- 2-litre engine (with speed sensor and governor)
- timesaving RG15 pin-mounting bracket (attaching/disconnecting the genset takes just minutes).
Are Reefer Containers Insulated?
DNV and ISO reefer containers have some insulation (0.8 to 1.2 mm) but are not the same as insulated containers:
- Insulated containers are unpowered and airtight; they are designed to store goods at a fixed temperature.
- Powered ISO and DNV reefer containers store frozen and chilled goods typically at -18 to -35 degrees C.
Why Are Reefer Containers White?
DNV and ISO reefer containers are painted white because this colour reflects more sunlight and so absorbs less heat. This means a lower workload for the refrigerating unit so it will:
- use less three-phase AC power – saving energy
- be less likely to break down
- need less ongoing maintenance and have a longer working lifespan.
What Is PTI In Reefer Containers?
A PTI is a pre-trip inspection of any DNV or ISO reefer container before its release to ensure:
- it is structurally sound
- the interior is clean and ready for cargo storage
- the refrigeration unit, temperature control, genset and recording device work correctly.
Checks includes fasteners, bolts, hatches, doors, couplings, brackets, coil, wiring, pipes, drain hose, pressures and noise.
Can Reefer Containers Heat?
DNV and ISO reefer containers are not just for sub-zero storage of goods: they can also keep a cargo warm.
Standard offshore reefers have an operational temperature range of -35 to +30 degrees C (and in ambient up to +50 degrees C). Provided they have power, they can maintain a warm temperature inside – regardless of conditions outside.