ROSEN Tank Bottom Inspection Blind Zone Scanner

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Reducing uninspected areas in tank floors

Page last modified
November 21 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

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Technology Readiness Level

[8/9]

Development Technology demonstration Mature / Proven
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The ROSEN Group is a leading global provider of cutting-edge solutions for all areas of the integrity management process. Since its origins as a one-man business in 1981, ROSEN has grown rapidly and continues to do so. Today the business is still privately owned and employs a team of more than 3,000, operating in more than 120 countries. The four key areas of expertise include:

  • Inspection of critical industrial assets to ensure reliable and effective operation
  • Customized engineering consultancy ensuring efficient asset integrity management
  • Production and supply of customized novel systems and products
  • Market-driven research and development providing “added value” products and services
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