Silverwing is now part of Eddyfi Technologies

Floormap-R Stop on Defect MFL Tank Bottom Scanner

  • Autostop, stop on defect capability
  • Free scan mode with Real Time Scan (RTS) view
  • MFLi plate view for scan analysis
  • STARS top surface view

Silverwing is world renowned for its advanced Magnetic Flux Leakage (MFL) tank bottom scanning systems, with our mapping Floormap3Di established as the industry benchmark. However, Silverwing recognizes that full tank mapping is not always required and there is also a requirement for rapid MFL screening combined with ultrasonic defect sizing.

The Floormap-R has been designed to meet this demand by bringing together the advanced defect detection capability of our Floormap systems with a simple to use stop on defect scanner system.

Together these innovative features achieve significant advances in corrosion measurement, with the potential to reduce inspection times and significantly enhance the quality of a tank inspection. This enables tank engineers to determine the optimum repair strategy and improve the outcome of Fitness For Service (FFS) assessments, Remaining Life Assessment (RLA), and Risk Based Inspection (RBI) programs.

MFLi3000 Tank Bottom Inspection
MFLi3000 - Stop on defect freescan mode
MFL tank bottom corrosion

High Productivity and Accuracy

The Floormap-R is designed to increase productivity by providing the technician with powerful yet simple analysis tools.

The flexible system adapts to the testing procedures being used, whether it be monitoring a real time display, automatically stopping on a defect or reviewing a whole scan at the end of a run.

Key Features:
  • MFL Scanner with 12", 64 channel MFL head, total 256 sensors
  • Touch screen ruggedized tablet computer for display and control
  • Digital calibration with store/recall
  • Motorised with speed control
  • Variable from 0.5m/s (19.7" / second) to 1m/s (39.4" / second)
  • Real Time Scan (RTS) view of surface for assessing corrosion whilst scanning
  • MFLi plate view for scan analysis with adjustable threshold
  • STARS top surface view displaying top side corrosion
  • Autostop, stop on defect capability with adjustable threshold
  • Through coating inspection up to 1/4" incl FRP, GRP and SS
  • Export of scan images to USB key
  • Floormap3Di upgrade path
On board software functions:
  • Immediate display of plate inspection data
  • Pan and zoom in on defects
  • C-scan / MFL and STARS views
  • Advanced MFL signal processing for improved defect accuracy
  • Individual calibrations per plate to handle different plate thickness (main area, annulars)
  • Touch screen display works with gloves
Calibration scan
Calibration Scan
20%, 40%, 60% & 80% defects.
Floormap-R can calibrate for any defect type using its unique calibration display.
View individual plates in more detail
Calibration Traces
By incorporating two individual thresholds Floormap-R provides additional detection confidence.
Real Time Scan
Real Time Scan
A real time scan displays the last 40 inches scanned.
Endscan View
End-scan View
Unique to Silverwing the Endscan view details all signals captured but the Real Time Scan view only displays those of interest above a variable threshold.
Location and severity of the corrosion
Scan Analysis
Floormap-R scan analysis window allows unprecedented stop-on-defect scan analysis. The signals of interest indicator displays how many defects have been detected above the set threshold.
MFL View - underside corrosion
Underside Corrosion View
Switch to MFL view to show only underside corrosion.
Stars View - topside corrosion
Topside Corrosion View
Switch to STARS view to detail only top side corrosion.
re-locate to an area of corrosion
Relocate to Corrosion Areas
Floormap-R has the ability to re-locate to an area of interest. The operator can either manually return the scanner to an area or select the reverse drive function.
Location and severity of the corrosion
Zoom in on Corroded Areas
When defects are found Floormap-R allows the user to arrow in, investigate further, confirm the defects existence, learn its surface origin, investigate the surrounding area and then export an image to include in the report.

Real Time Scan View

The Real Time Scan (RTS) displays an MFL view of the plate, either colour coded to show the magnitude of MFL response, or set to a simple black/white view of indications above a threshold.

The technician can watch the screen during a scan to see where corrosion is present.

The information is also recorded so once the scanner stops the image remains on screen, removing the need to scan back and forwards over a suspect area.

In the scan mode the Autostop feature can be enabled to stop the scanner whenever an indication goes above a set threshold.

The user then sees an image of the last 40" scanned helping with ultrasonic or pit gauge prove up.

Real time scan with stop on defect
Real Time display of MFL view and End-scan side bar

Surface Profile with STARS Technology

The innovative STARS technology adds an additional 64 channel sensor array to detect variations in magnetic field strength caused by top side defects.

Once a scan is complete the technician can switch to the STARS view to identify top side defects, extremely useful for coated tank floors where it’s not obvious without removing the coating on which side the of the plate the corrosion is originating.

This significantly speeds up the inspection and reporting process and allows engineers to determine an appropriate repair strategy.

STARS works effectively up to 1/4" (6.35 mm) of coating.

STARS top surface defects
High resolution STARS sensor view detailing top side defects

MFLi View

Floormap-R introduces a new high contrast plate view based on the intensity of MFL signal response.

The MFLi defect map uses multiple colour palettes to highlight areas of corrosion, reduce the effect of spurious indications, and most importantly to help classify defect type. A quick review at the end of each scan gives the technician information about the plate condition and the type of corrosion if any is found.

This powerful detection and classification tool can reveal the presence of small diameter pitting, SRB attack, erosion patterns and other features that require further verification.

Floormap-R also has a unique defect detection algorithm that displays the number of indications above the set threshold, and an End-scan view to show where they exist along the scan for rapid review.

Zoom MFLi veiw
High resolution MFLi view detailing top and bottom defects

Saving Scan Images

Floormap-R does not have full data recording and mapping, but still allows the technician to save particular scans of interest with additional notes.

These scans are stored in standard PNG image format that can be viewed with many word processing and image software applications. This gives an added level of confidence to reports, showing corrosion patterns in addition to the normal thickness record given by manual prove up.

Export Image Process
Easy Export Image Process

Calibration Routine

Floormap-R system has a digital calibration system for easy setup, along with traceability of the settings for reporting.

The technician can use either a Silverwing calibration plate or any plate with indications in the range of indications to be found.

A visual graph for threshold setting and gain confirmation ensures the correct sensitivity is set quickly and easily.

MFL Calibration Routine
MFL Calibration Routine

Data Acquisition Software

The on-board computer uses touch screen technology and a proven user interface for ease of use within the hostile storage tank environment. When an inspection surface is scanned, Floormap-R system displays, in real time, all of the corrosion detected.

The real time defect threshold is fully adjustable and is used to display only corrosion above the desired report level. Floormap-R still captures all signals so the threshold can be lowered after a scan is complete to reveal any lower level corrosion.

To perform a detailed analysis the operator can select to view MFLi/MFL for corrosion severity or STARS for top surface view, providing instant feedback on tank condition.

Floormap-R is unique in that it provides two fully adjustable thresholds that work together to provide unparalleled inspection confidence.

To ensure that no defects are overlooked during the real time scanning Floormap-R incorporates a signals of interest indicator. This indicator informs the operator of the location and of how many corrosion defects were recorded above the set threshold. The operator can then return to the corroded area using Floormap-R’s reverse and scan image marker features.

Upgrade Path

Floormap-R sensor head and scanning frame uses the same technology as used by the Floormap3Di advanced mapping system, and can be upgraded with new software and control board to offer full mapping and advanced analysis.

The system can then operate in either Floormap3Di or MFLi3000 mode depending on inspection demands.

Technical Specification

Technical Specification
Principle of operation:
Magnetic Flux Leakage & Magnetic Field Reluctance
Method of detection:
256 Hall Effect sensors, 64 channels
Stop on defect mode with variable threshold
Top and bottom discrimination:
Manual, using STARS technology
Test through coatings:
Up to ¼" (6.35 mm) if non magnetic
Variable from 0.5m/s (19.7" / second) to 1m/s (39.4" / second)
Scan width:
12" (300mm)
Maximum single scan length:
105 ft (32 metres)
Scan coverage:
354 in² / minute ( 9 m² / minute)
Positional accuracy:
± 0.04% (± 3/32" over 26 ft) (± 3 mm over 8 metres)
Method of propulsion:
DC motor, anti-static drive wheels
Heavy duty, multi compound rollers
Real time analysis:
X / Y position, plate view, MFL, MFLi, STARS
Scan Storage:
Internal disk storage with export to USB drive, PNG format
Dimensions, Power & Temperature
Height: 38.7" Width: 20", Length: 27.1" (H: 980.5 mm, Width: 510 mm, Length: 690 mm )
126 lbs (57.5 kg)
Minimum man-way size:
20” (500 mm)
Transit case:
Meets IATA requirements for transporting magnetisable material
Power requirements:
1 x 12V, 25 amp-hour sealed lead acid batteries
Supplied with 2 batteries and 2 chargers for continuous use
Typical battery operational time:
Up to 3 hours
Operating temperature:
-22°F to 131°F(-30°C to 55°C)
Storage temperature:
-31°F to 167°F ( -35°C to 75°C)
10 - 95% RH
Detection Capabilities
Minimum defect detection sensitivity:
0.08" (2 mm) diameter pipe type 50% deep
Minimum defect sizing sensitivity:
20% material loss (ball type) under floor and top surface
Un-scanned area:
3/8" (10 mm) from plate weld, 6.3" x 6.3" (160 mm x 160 mm) corner dead zone
Calibration Plates
Standard Reference Plates:
6 mm – Part No: FMCP30
8 mm – Part No: FMCP28
10 mm – Part No: FMCP29
12 mm – Part No: FMCP31

MFLi3000 - MFL Tank Bottom Inspection, Stop on Defect


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