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20' Porthole Container

This type of container is often referred to not as a refrigerated container but as an insulated container, as it has no integral refrigeration unit. The lack of a refrigeration unit allows such containers to have a larger internal volume and payload than integral units. On board, the inside of the container is supplied with cold air via the ship's central cooling plant. The air flows through the container in the same way as in integral units. Cold air is blown in at the bottom and the "warm" air is removed at the top.

Off the ship, the temperature is controlled by a terminal refrigeration system or "clip-on units". After completion of transport, the "clip-on units" may be returned using special frameworks, dimensions of which match those of a 20' container

On the opposite end wall from the door, the containers are provided with openings for supply and return air. In general, supply air is blown into the lower opening, distributed by means of the gratings in the container floor, conveyed upwards through the cargo and discharged via the return air opening. This type of container also requires adequate air flow. For this purpose, appropriate air ducts must be provided in the floor and the ceiling and the cargo must be sensibly packaged and stowed.

Porthole containers do not have an integral temperature display. Either such a display is installed in the terminal refrigeration systems or the "clip-on units" or the temperature values may be obtained from the ship's central cooling plant.

If the porthole-containers are provided with "clip-on units" when ashore, they no longer fulfill ISO requirements with regard to dimensions.

Dimensions / weights

The following are some of the most important details relating to refrigerated container types.
The data was taken from Hapag- Lloyd, Hamburg.

Insulated container: 20' long and 8' high, with steel frame, walls of sandwich construction
Internal dimensions Door openings Weights Volume

[m≥]
Length

[mm]
Width

[mm]
Max. load height

[mm]
Width

[mm]
Height

[mm]
Gross

[kg]
Tare

[kg]
Net

[kg]
5724 2286 2014 2286 2067 24000 2550 21450 26,4
5770 2260 2110 2260 2090 24000 2900 21100 27,5
5770 2260 2110 2260 2090 27000 2900 24100 27,5

 

Integral Unit: 20' long and 8'6" high, with steel frame, walls of sandwich construction
Internal dimensions Door openings Weights Volume

[m≥]
Footnote
Length

[mm]
Width

[mm]
Height

[mm]
Max. load height

[mm]
Width

[mm]
Height

[mm]
Gross

[kg]
Tare

[kg]
Net

[kg]
5479 2286 2257 2157 2286 2220 30480 3160 27320 28,3 1)
5459 2295 2268 2168 2291 2259 30480 3050 27430 28,4 2)
5448 2290 2264 2164 2286 2260 30480 3060 27420 28,3 2)
5534 2316 2331 2231 2316 2290 30480 3030 27450 29,9 2)
5529 2316 2331 2290 2316 2290 30480 2960 27520 29,9 2)
5535 2284 2270 2224 2290 2264 30480 2942 27538 28,7 2)

1) Not suitable for transporting foodstuffs
2) Suitable for clip-on generators


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fax        +380 56 - 721 95 55
email     info@marinetrans.eu


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