ISO Tank containers are dedicated on the transport of bulk liquid products and are built under ISO (International Organization for Standardization) standards and designed on a type-of-substance basis, made of stainless steel alloy and surrounded by protective layers.
The ISO tank container is equipped with a system of valves on top and on the bottom to allow the load and unload operations in a safe and clean way It is shaped like a cylinder and can carry between 21,000 and 40,000 liters of liquid.
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These tanks are classified according to its building specifications and the accessories attached to it. This classification determines the type of product that can be transported. The supporting frame is intended to protect the tank, as well as to facilitate stowage, securing and same handling as an ISO container for multimodal transportation.
If handled properly, the frame is capable of withstanding the stresses to which a fully loaded container is subjected.
ISO certification is recognised worldwide as a commitment to continuous improvement in all areas of operations. For organisations, the standard helps ensure that business processes meet the needs of their customers and all regulatory agencies.
For ISO Tank containers, tanks are manufactured in accordance with international regulations and must be inspected and certified. All ISO Tanks must comply with regulations such as size, strength and durability and must be fit for their primary purpose.
ISO Tanks include a Container Security Certificate (CSC) issued by the manufacturer. Official Inspections are carried every 5 and 2.5 years to certify the optimal condition of the ISO tank according official standards. On top of that after each use ISO tanks are revised to guarantee that the equipment is in good transport condition.
All portable liquids, non-hazardous and hazardous liquids, including corrosive, flammable, toxic and explosive liquids, and food grade classified to name a few:
This container eliminates the risks that can arise when transferring liquids from one vessel to storage facilities and provides an extremely safe, cost-effective and viable means of transport.
Once emptied, the tank is transferred to a certified washing station, thoroughly cleaned and inspected to get it ready for the next loading. Although the tanks have a fairly uniform external appearance, construction materials, internal coating and fittings vary.
For more information on cargo transport with ISO Tank contact our dedicated team at:
The ISO Tank Container, also known as the UN portable tank, tank container, ISOtainer, tanktainer, bulk storage container, shipping tank, or intermodal tank, is used for the transportation and storage of hazardous and non-hazardous chemicals, foodstuffs, and liquefied gases.
In the s containers became the preferred way of moving goods around the world. The appeal was that every container conformed to sizes defined by the International Standards Organisation (ISO), 40' x 8' x 8'6' or 20' x 8' x 8'6'. (See Wiki article). Before long, the concept of fitting a stainless steel cylinder inside the standard 20' frame was adopted and the ISO Tank was born. ISO Tanks became the standard for the transportation of liquids (including fuel), chemicals, gases, powders, and even some types of food, around the world.
Steve Darnell, the founder of Qualitank, began work for Trafpac in the s. (Trafpac was one the first ISO Tank companies in the world.) Before long he was running his own tank repair business, and, over time, moved into the sale and hire of used ISO Tanks. Qualitank Services was incorporated in .
An ISO Tank Container (sometimes called 'Tanktainer') is a stainless steel cylindrical vessel, usually made of 316 grade stainless steel, fixed to a mild steel frame, usually welded. The thickness of this container will vary depending on the purpose of the tank and will be rated for a specific working pressure. Beyond that, there are a bewildering array of variants.
For more information, please visit ISO S304 stainless steel horizontal container tank.
Tanks are generally designed for a specific purpose or product and therefore there is no fixed construction that applies to all tanks. Because the product to be carried may heavy (have a specific gravity that restricts the volume that can be carried) and because there are limits to the weight that a loaded ISO Tank can be, the capacity of tanks varies greatly, typically from 21,000 Litres up to 27,000 Litres in a standard sized frame. (Smaller capacities will likely be in a smaller frame ' 8' high rather than 8'6') Capacities beyond this are possible by extending the tank length so it sits outside of the standard frame and these tanks are known as 'Swap Bodies'. Swap Body tank capacities can exceed 34,000 Litres.
One of our 31,000 Litre 'Swap Body' TanksThe majority of tanks have means of heating the product inside the tank to allow the contents to flow more easily. Most commonly this heating is done by passing steam through pipes attached to the tank, which are surrounded by a layer of fibre glass insulation, which in turn is encased in either Glass Reinforced Plastic (GPR) or Aluminium. Some ISO tanks have an electrical heating system. Others have a refrigeration system to keep their contents cool. Occasionally a tank will have a rubber lining as the product being carried is highly corrosive. Some tanks have 2 or more compartments. Some tanks are designed to be pressurised for the transport of gasses. It is common for tanks to have no heating/cooling or insulation and are used for the transport of powders or liquids which flow easily at normal temperatures.
Tanks used for the transportation of dangerous goods must meet standards applicable to the mode of transport. ISO tanks are Intermodal (able to be carried by Road, Rail and Truck) and they must meet standards as defined by the relevant mode of transport. When the tank has been built it will be tested and issued with a certificate specifying which of the standards it meets. The tanks will have a full (hydraulic) test every 5 years and a partial retest (air pressure) at 2.5 years. The most common type of tank is UN type T11 which can carry more than types of dangerous goods. T11 tanks are tested to 6 bars of pressure and have a working pressure of 4 bar. (Qualitank keep a number of tanks available which have current valid test certificates.)
When sourcing our tanks we remove the identifying marks of the previous owner and apply our own numbering system based on internationally accepted code. This means that every single tank or container shipped around the world has its own unique number. Most of our tanks begin with the prefix QTSU'.
Isotainers will have a means of both filling and discharging the contents. The most common discharge is an outlet located on the bottom of the tank and will allow discharge under gravity. (Bottom discharge). Most tanks will have a means of pressurising the vessel to facilitate pumping the contents out. Some tanks will have a pipe going down from on top of the tank to the bottom inside the tank. This facilitates the pressurisation of the tank to allow discharge through this pipe (Top Discharge).
The bottom discharge outlets of UN type T11 tanks must have at least three independent closures that can stop the flow of any contents. 2 open/close valves and a screw on cap qualifies as the third closure.
Bottom DischargeFor inspection purposes there is an opening on top of the unit (man lid) that is 500mm or larger in diameter. Usually this is positioned inside an external fitting known as a spill box. The man lid is sealed with a high-quality gasket. The spill box is as it sounds, it is there to collect any spillage of the tank contents. Within the spill box is often an air valve that allows for the depressurisation of the tank, sometimes with a means of safely collecting or returning the gas back into the tank.
Manlid with Swing BoltsAs ISO Tanks are designed to be pressurised there is an air inlet/outlet valve, usually at the top of the tank.
Air inlet with pressure gauge alongside. Also a blank over flange plate to allow extra fittings on tank.As a tank container is designed to be pressurised then there has to be a pressure relief valve which often also incorporates a vacuum relief in the one piece of equipment.
Pressure Relief Valve(s)To carry dangerous goods on the roads/railways/shipping each tank must be pressure tested, inspected and certified as suitable. On each there must be a data plate on which are stamped important details about the tank. Manufacturer, Serial Number, Year of Manufacture, Date of first test, Date of last test, the type of test (2.5 or 5 year), Tare Weight, and Maximum Gross Weight are some of the information recorded on the data plate.
Data PlateTank Containers are extremely configurable and may be built to safely carry a huge variety of loads, such as:
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A 25,000 litre ISO Tank we have repainted.