The global tank container fleet comprises a range of tank types including tanks for liquids, liquefied gases, powders, swap tanks and specials. Tanks below 20ft length such as those typical of the offshore oil industry are not included in this Survey. The tank container is highly regulated and is required to meet stringent standards of operation, including statutory periodic inspection and renewal of test certification. However, there is no global register of tank containers. Data must be collected by systematically requesting tank owners and operators to provide company fleet numbers and manufacturers to report new production. Where firm data is not provided, this Survey provides estimates based on internet research and consultation with experienced industry representatives. Reported figures are recorded as received or, in the case of the charts within the report, the result of the percentage calculation of data. It is not intended to suggest that calculated figures are accurate to an exact number. Readers should round up, or down, as required.

 Leased fleet listings are not included in the total industry fleet figures, except for the relatively few estimated stocks that are idle. The balance of “on lease” tanks is typically estimated to be leased to operators (65%) and shippers and other tank users (35%). This percentage might vary by leasing company according to their market strengths and objectives, but is an estimated average. The trend is for a greater proportion leased to operators but for consistency with previous surveys the percentage breakdown remains unchanged. 

  Whereas there is a trend to outsource tank logistics to tank operators, there remains a fleet of tanks directly controlled by shippers and others. Shipper (also referred to as producers or consignors) fleet and others are challenging to assess because of the vast number of shippers and others worldwide. It is especially difficult to compile a list of shipper-owned tank containers, because tank ownership is a relatively small part of their core business and – as a result – fleet figures are not freely available. This also applies to other tank users – such as shipping lines, military authorities, railways, oil companies, mining industry and China domestic. Estimates of the 

total “others” are included in the Survey. 

  As a result of the trend to outsource tank logistics it is estimated that the shipper and others owned fleet is static. Operators might provide logistics services for shipper-owned tanks, but the tanks are not included as operator tanks for the purpose of this survey. It is estimated that on average about 35% of the total leasing company fleet is leased directly to shippers and others. In the 2013 Survey it was estimated that shippers and others might own, on average, about the same number of tanks that are leased into their fleet. This number remains unchanged in the 2016 Survey and in preceding years. Users of the Survey can make adjustments to suit their needs. More details on the methodology are given as explanations accompanying tables and figures. 


Post time: 01-03-2018
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