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ROSEN Tank Bottom Inspection Blind Zone Scanner
Reducing uninspected areas in tank floors
Page last modified
May 11 2023
The Blind Zone Scanner introduces a new feature for the ROSEN Tank Bottom Inspection Service (TBIT Ultra) for inspection of aboveground storage tanks. The smaller configuration of the measurement unit itself means the Blind Zone Scanner is able to reach area that would otherwise remain uninspected due to the physical limitations of conventional tank floor scanners. Similar to the TBIT Ultra floor scanner, the Blind Zone Scanner uses high-resolution MFL sensors and an automated detection and sizing algorithm that significantly increases the probability of detection while reducing personnel time in confined spaces.
Pro/con
Ability to scan below obstacles such as internal piping and heating coils
Automated defect detection and sizing (more reliable and more accurate than manual UT)
Full capture and storage of high-resolution mapping data
Provision of indications and location (coordinates) of metal loss
Measurement of liftoff between sensors and steel plate
Data stitching, i.e. the alignment of data sets from tank floor scanner (TBIT Ultra) and Blind Zone Scanner
Not suitable for inspection of large surfaces
Specification
Detection threshold
0.2t Ø3mm [0.12”] × 0.2t
Internal/external discrimination
Yes
Plate thickness
4-8mm [0.156”-0.315”]
No. of sensors
270 (Hall + EC)
Scan speed
Less than a minute per blind zone (245mm × 245mm [10” × 10”]
Sizing accuracy depth
±0.1t
Relative Business Impact
Technology Readiness Level
[8/9]
Development
Technology demonstration
Mature / Proven
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