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Handscan Tank Bottom Corrosion Screening

Handscan MFL corrosion detection mini-scanner is designed to complement the Floormap range floor scanners.

Signals from corrosion, above the operator-controllable threshold, appear as visual and audible alarms. Its low-profile and extendable handle enable scanning in otherwise inaccessible areas of storage tanks such as the shell-to-annular area, under pipe work and heater coils.

Inspection data from the Handscan can be added into the SIMS reporting software manually when used in conjunction with the Floormap floor scanners to produce a complete fingerprint of a tank floor’s condition.

How It Works

The operator first connects the sensor cable to the scanner head and electronics module. The MFL control module is then turned on, the required floor thickness configured, and the alarm sensitivity is adjusted using a reference pipe with known artificial defects. All the operator has to do then is push the scanner head and monitor the MFL control module for alarms. Any area identified by Handscan can then be marked for further analysis with a secondary inspection technique, usually ultrasonic testing (UT).

Features

  • High PoD of corrosion issues
  • Easy to use by semi-skilled operator
  • Alternative heads available for internal scanning of small vessels and pipes
  • Ideal solution for small-diameter tanks under 15 m (49.2 ft) with petal design
  • Low profile with extendable handle
  • Suitable for shell-to-annular areas and under pipework
  • Latest-generation permanent magnet technology
  • Separate battery-operated light MFL control module
  • Cost-effective inspection too
Product Downloads
Specification

Operational principle

Magnetic-flux leakage

Detection

16 off Hall effect sensors

Scan width

150 mm (6 in)

Propulsion method

Manual pushing/pulling

Speed

0.5 m/s (1.6 ft/s)

Handle

Extendable

Profile

Required clearance under pipework: 120 mm (4.7 in)

Maximum thickness

15 mm (0.6 in)

Test through coatings

Yes, if non magnetic

Maximum coating thickness

6 mm (0.24 in)

Maximum sensitivity

10% underfloor on uncoated 6 mm (0.24 in) plates

20% underfloor on coated 6 mm (0.24 in) plates

Cable

5 m (16.4 ft)

Power requirements

12 V battery operation

Transit case

Meets IATA requirements for transporting magnetizable material

Operating weight

18 kg (39.6 lb)—scanner head and MFL control module

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