Objective
To investigate the feasibility of an improved system (Floorscanner) to inspect floors of large oil storage tanks.
Failure of such huge tanks containing up to 100,000m3 of crude oil can result in catastrophic effects to the environment. Particularly the soil side of the steel floors of these tanks is prone to unpredictable corrosion and leakage.
A few years ago the partners developed a floorscanner from an invention by UKAEA. This inspection tool uses the magnetic flux distortion method which copes very well with unprepared tank floor conditions. The prototype floorscanner was able to detect reliably localized corrosion of floors in a cost effective way. Subsequently this tool proved its usefulness in practice, but also that it has its limitations, viz: the floorscanner can only detect localized corrosion and in tank floors with a nominal thickness of up to 6 mm.
There is an increasing need from the industry to improve the performance of the tool to make it suitable for :
* local corrosion detection in plates with thicknesses up to 20 mm;
* detection of general corrosion.
These requirements cannot easily be met without considerable development work which is close to but reyond the present knowledge of the partners. Already, several potential solutions have been identified.
There is a strong preference for magnetic methods which also enables implementation of both solutions into one inspection tool.
The methods envisaged require considerable fundamental and experimental work. The result of this feasibility study ultimately will be worked out in a basic specification for a tool meeting the indicated targets of detection of local and general, corrosion in tank floor plated with thicknesses up to 20 mm.
Such a system is of paramount importance to the European Community and elsewhere because it enables early detection of weak spots in oil storage tanks which are a potential hazard to the environment if not properly monitored and maintained.
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Programme(s)
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Funding Scheme
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Coordinator
3046 NC ROTTERDAM
Netherlands
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