Silverwing is now part of Eddyfi Technologies

MFL Corrosion Inspection - XC80



Inspection of Steel Aboveground Storage Tanks Used in the Industry (TWI Exam Preparation Training)

Course Reference:


Course Duration/Credits:

5 days - 24 hours

Course Venue:

Silverwing Middle East, training school, Dubai

Course Date:

Course Objectives

In order to meet the needs of today's fast changing inspection industry, Silverwing (UK) Ltd has developed the "MFL Tank Corrosion Inspection Course with TWI Exam Preparation”.

The course includes notes and summaries on the tank inspection standards referenced in the API 653, EEMUA 159 and UK HSE 481 report.

This comprehensive 24 hour course consists of three 8-hour teaching days. It is designed to accomplish a two-fold training agenda:

  • To train those individuals who are interested in obtaining the TWI Tank Inspection Certification.
  • Train those who require to operate Silverwing Floormap systems as a MFL grade I technician.
  • Train those who require a working knowledge of the intricacies encountered in the working environment.

Silverwing (UK) Ltd is proud of the high pass rate attained by its students who have sat for the TWI MFL personnel certification exam.

Who Should Attend:

The course is intended for Inspection Engineers who are seeking certification as a MFL / NDT technicians or inspectors. Other engineers, managers or technical staffs who are dealing with Steel Aboveground Storage Tanks used in the Petrochemical Industry may also benefit.

Candidates should have the following minimum criteria:

  • English speaking
  • Computer literate in all Microsoft XP professional or later including MS Word as well as MS Excel functions
  • Preferably ASNT Level II UT certification or similar
  • Able to read Jaeger No 2 or equivalent type eye chart at a distance of not more than 305 mm and illustrate a test within last 12 months
  • Able to illustrate completion of colour detection test using Ishihara isochromatic plate within last 3 years

Training Methodology

50% Lectures
30% Workshops, Group Work & Practical Exercises
20% Videos & Software

Course Certificate

Silverwing certificate will be issued to all attendees completing minimum of 75% of the total tuition hours of the course and acceptable examination pass mark for grading as a Level I or Level II MFL/UT technician as appropriate

Course Accreditation

Silverwing courses meet the professional certification and continuing education requirements for participants seeking Continuing Education Units (CEUs) in accordance with the rules & regulations of the International Association for Continuing Education & Training (IACET). IACET is an international authority that evaluates programs according to strict, research-based criteria and guidelines. The CEU is an internationally accepted uniform unit of measurement in qualified courses of continuing education.

The Welding Institute (TWI) recognise the course as a valuable requirement of the Qualification for Tank Bottom Examination (MFL) personnel which is a requirement for any organisation wishing to perform inspection services for Shell BV organisation and their affiliates.

Required Codes and Standards:

Listed below are the effective editions of the publications required for any competent site supervisor Aboveground Storage Tank Inspector.

  • API Standard 653, Tank Inspection, Repair, Alteration, and Reconstruction, Third Edition, December 2001; including Addendum 1 (September 2003) and Addendum 2 (November 2005). IHS Product Code API CERT 653
  • EEMUA Standard 159
  • HSE 481

Course Fee

£350.00 per Delegate. This rate includes Participant’s Pack (Folder, Manual, Hand-outs, etc.), buffet lunch, coffee/tea on arrival, morning & afternoon of each day.


Accommodation is not included in the course fees. However, any accommodation required can be arranged by Silverwing or Silverwing Middle East LLC at the time of booking.

Course Programme

The following programme is planned for this course. However, the course instructor(s) may modify this programme before or during the course for technical reasons with no prior notice to participants. Nevertheless, the course objectives will always be met:

Day 1: MFL

0800 – 0815
0815 – 0830
0830 – 1000
1000 – 1015
1015 – 1045
1045 – 1230
1230 – 1330
Registration & Coffee
Introduction – Causes of corrosion in tank floors, History, magnet properties, polarity, attraction & repulsion, Magnetographs, Field strength(H), Flux density(B), units Telsa , Gauss
Magnetic flow, Materials, ferromagnetic, Diamagnetic non magnetic, permeability, reluctance.
Bar magnets, consequent poles, leakage fields, methods of detection of flux leakage, magnetic particle coils, hall effect, vectors, horizontal and vertical components
1330 – 1445
1445 – 1500
1500 – 1715
1715 – 1730
Methods of magnetisation, permanent magnets, electromagnets, Hysteresis, demagnetisation, magnetic induction, Faradays laws, relationship between speed and induced signal
MFL corrosion detection, schematic layout, Floormap systems, HandScan system, magnet carriage, lift off, hazards & safety precautions, sensor head, sensor arrangement, lift off, electronic module, battery & motor unit
Review day , Questions & Answers session,
End of Day One

Day 2: MFL

0815 – 0830
0830 – 1000
1000 – 1015
1015 – 1230
1230 – 1330
1330 – 1400
1400 – 1500
1500 – 1515
1515 - 1615
1615 – 1715
1715 – 1730
Review previous day
Demonstrations- & practice
Correct Transit case removal of Floormap unit and replacement procedure.
Fitting & removing the battery
Battery Typical run time & charging time
Demonstrations & practice
Sensitivity & stability change that will indicate low battery voltage condition
Battery charger voltage input range & charging procedure
Sensor head adjustment
Sensor head heights for various plate & coating thickness
Floormap controls, power, thickness range, threshold, auto stop, Resets, Channel indicators, drive handle, removable (left) handle, cables & connectors
Setting up the Floormap unit, Warm up time, range selector switch, auto stop offset
Inspection, safety requirements ( HSE 481), Tank cleanliness for inspection, plate numbering, tank datum, scanning patterns, marking up for UT verification
Limitations & sources of error, cleanliness, Weldments & spatter, plate contour & distortion, speed & handling, floor coating & products residue or spillage. Maintenance & cleanliness of Floormap scanner
Review day , Questions & Answers session,

Day 3: Practical sessions, Written & practical tests

0815 – 0830
0800 – 1000
1000 – 1015
1015 – 1230
1230 – 1330
1330 – 1530
1530 – 1545
1545 – 1600
Review previous day
Revision and practice sessions
Revision & practice session
Written tests 2 papers
Software & practical tests
13th June 2016
07thJuly 2016
28th Sept 2016