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3D MFL Tank Floor Scanning

3D MFL Tank Floor Scanning: Odera Axiom continues to invest in the latest Technology with the addition of the Silverwing Computerised Magnetic Flux Leakage (MFL) Floormap 3D scanner with STARS technology to provide discrimination between top and bottom surface defects.


Surface profile with STARS technology

The metal bottom of a tank can produce an unnecessary inspection and maintenance effort in comparison to its initial cost. This reflects the difficulty in detecting corrosion of the tank floor, especially on the underside. This in turn can give rise to an insidious loss of product and damage to the environment with the inevitability of a reduction in profits. The metal bottom of a tank can produce an unnecessary inspection and maintenance effort in comparison to its initial cost. This reflects the difficulty in detecting corrosion of the tank floor, especially on the underside. This in turn can give rise to an insidious loss of product and damage to the environment with the inevitability of a reduction in profits.

Odera Axiom Consultants Limited

Whilst it is unusual for a failed floor to lead directly to catastrophic failure of a storage tank, it is not impossible for it to do so. A more common failure mechanism is leakage through the floor damaging the tank foundations, which could lead to instability and eventual catastrophic failure. Nevertheless, the integrity of the original tank bottom remains the prime means of preventing product loss and associated damage to the environment, and thus it needs to be maintained in a sound condition. Recent developments in the methods available to inspect tank floors make remaining life predictions easier. The Floormap3D is the most advanced MFL floor scanner on the market today. Odera Axiom combines this unit with a complimentary inspection tool (Hand Scan HS 100 system) that is ideal for the restricted areas such as adjacent to shell wall; below internal piping and at plate intersections; also for storage tanks of diameters lower than 10 m, petal floor plate designs or in situ heating coils.
The degree of inspection and repair that it is economically sensible to perform before the whole floor is replaced will be influenced by many factors. These obviously include material and contracting costs, but a major factor will be the time and cost of cleaning the tank and preparing it for work. This latter cost will vary greatly depending on whether the tank is holding clean, light product or is handling crude or heavy oil or a dirty liquid.

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