Inspection Preparation, Setup and Operation
38
•
The external conditioning (e.g., location of the tank, soil, and altitude).
•
The age of the storage tank and its inspection history.
•
Identify the history of the product stored in the storage tank and the condition of the plate
coating (if any).
•
Tank Diameter: required to calculate the annular ring.
3.
Check the cleanliness of the inspection surface. In poor conditions the scanning bridge can
attract loose ferrous material, which can sometimes interfere with the accuracy of MFL
indications.
IMPORTANT
It is recommended that the scanning bridge is regularly cleaned at intervals during inspection
if this is the case. To aid scanning head cleaning it is recommended to set the magnet position
to zero before cleaning as most magnetic debris will fall away from the scanner without
further action since there is no magnetic attracting force.
4.
Locate the tank datum position. When viewing a tank floor from above, the plates can be seen
to align in both the vertical and horizontal plane as illustrated below.
Figure 24: Tank floor aligning for horizontal and vertical plane
Identifying a tank datum is important as the plate numbering system, the plate reference and
the plate orientation are all referenced to the tank datum. The tank datum position is established
within a tank by:
5.
Looking at the tank floor from above.
6.
Establishing the plate rows that run parallel.
7.
Orientating yourself to look perpendicular to the plate rows.
Figure 25: Identifying parallel plate rows
Figure 26: Orientating to be perpendicular to plate rows
Ve
rt
ic
al
Horizontal
Summary of Contents for Floormap X
Page 1: ...User s Manual Floormap X MFL Array Tank Floor Inspection Solution...
Page 10: ...10 Chapter 1 Precautions and conventions...
Page 16: ...General Precautions and Conventions 16 1 5 EU Declaration of Conformity...
Page 19: ...19 Chapter 2 FloormapX System Overview...
Page 35: ...35 Chapter 3 Inspection Preparation Setup and Operation...
Page 43: ...43 Chapter 4 SIMS GO Data Acquisition Software...
Page 69: ...69 Chapter 5 SIMS PRO...
