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Magnetic Flux Leakage (MFL)

Overview of Magnetic Flux Leakage (MFL)

Magnetic Flux Leakage (MFL) is a nondestructive examination technique that uses electromagnetism to inspect for flaws or material degradation in steel structures. In the oil and gas industry, it is often used to search for flaws in piping and pipelines, as well as aboveground storage tank floors. MFL uses magnets to temporarily magnetize the structure. If there are flaws present, the magnetic field created will show distortions, signaling the presence of things like corrosion, pitting, and wall loss. 

 

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Acoustic Emission Testing (AET) Advanced Ultrasonic Backscatter Technique (AUBT) Eddy Current Array (ECA) Electro Magnetic Acoustic Transducers (EMAT) Guided Wave Ultrasonics (GWUT) Infrared Inspection Liquid Penetrant Examination (LPE) Magnetic Particle Testing (MPT) Meandering Winding Magnetometer Array (MWMA) Pulse Reflectometry Pulsed Eddy Current (PEC) Radiography Remote Field Eddy Current (RFEC) Ultrasonic Testing (UT)
Articles about Magnetic Flux Leakage (MFL)
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    By Matt Ellinger at DNV GL

    The purpose of this article is to describe the various in-line inspection (ILI) technologies that are currently available to the market. The pros, cons, and applicability of each type of tool will be discussed in greater detail.

  • July/August 2015 Inspectioneering Journal
    By Robert Frater at Engineering & Inspection Services, LLC

    Refinery, petrochemical, and storage tank operators are responsible for properly cleaning facility tanks on a periodic maintenance basis, typically in 20 to 30 year increments. This article provides a suggested “checklist” of inspection activities to ensure safe and reliable operations after cleaning.

  • Blog
    June 1, 2015 By Nick Schmoyer at Inspectioneering

    Nondestructive Testing (NDT) makes up the majority of testing performed in our industry. There many different types of nondestructive testing techniques. Each method has its own advantages and disadvantages; each can detect different types of flaws. Some are simple to perform, others are difficult. Some are used on several different types of equipment, others are more restricted.

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    We talk about heat exchangers quite a bit here on Inspectioneering, most recently in the January/February issue of the Journal. This is because heat exchangers are vital pieces of equipment in nearly every type of plant or facility.

  • September/October 2014 Inspectioneering Journal
    By John Tiratsoo at Pipelines International

    The pigging industry has developed a tremendous range of techniques and technologies, and it is probably fair to say that there are few pipelines in the world that cannot be cleaned and inspected, although the success of such operations will often depend on the available budget.

  • Partner Content

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  • January/February 2014 Inspectioneering Journal
    By Bob Lasser at Imperium, Inc., and Daniel Oehl at Imperium, Inc.

    Technicians inspecting oil & gas installations and petrochemical plants employ a wide variety of nondestructive testing (NDT) techniques. A new technology has recently been developed that utilizes a real-time portable imaging device which has distinct advantages in finding internal corrosion.

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