What is MFL pigging?
Metal Loss / Corrosion (MFL) Pigs are a type of intelligent ILI pig used to measure pipe corrosion and metal loss using Magnetic Flux Leakage techniques.
What is an MFL tool?
In an MFL (or Magnetic Flux Leakage) tool, a magnetic detector is placed between the poles of the magnet to detect the leakage field. Analysts interpret the chart recording of the leakage field to identify damaged areas and to estimate the depth of metal loss.
What is used in MFL pigs to measure thickness in pipeline?
A magnetic flux leakage inspection pig uses magnetism to detect changes in the thickness of the pipe wall (see Figure 1). The pipe wall is magnetised using a strong magnet. Any metal-loss in the pipe wall will cause the induced magnetic field to change.
What is MFL testing?
Magnetic flux leakage (MFL) is a magnetic method of non-destructive testing that is used to detect corrosion, pitting and wall loss in steel structures. Magnetic flux leakage (MFL) is commonly used for inspecting tank floors in the petrochemical industry.
What is a MFL tool in pipeline?
Magnetic Flux Leakage (MFL) testing is a widely used, Non-Destructive Testing (NDT) method for the detection of corrosion and pitting in steel structures. MFL is often used for integrity assessment of pipelines and storage tanks, but the principle can be applied to assets in any industrial sector.
What are inline inspection tools?
In-line inspection (ILI) “tools”, referred to as “intelligent” Pipeline Integrity Gauges (PIG’s) or “smart” PIG’s, carry a variety of sensors to inspect pipelines for internal and external corrosion, geometric deformation, lamination, cracks, and other defects.
What is an ILI tool?
Sophisticated and sensitive in-line inspection (ILI) tools travel through the pipe and measure and record irregularities that may represent corrosion, cracks, laminations, deformations (dents, gouges, etc.), or other defects.